{"id":550,"date":"2018-02-23T23:39:15","date_gmt":"2018-02-23T15:39:15","guid":{"rendered":"http:\/\/60.205.208.74\/2018\/02\/23\/swift-%e8%ae%bf%e9%97%ae%e6%8e%a7%e5%88%b6\/"},"modified":"2018-02-23T23:39:15","modified_gmt":"2018-02-23T15:39:15","slug":"swift-%e8%ae%bf%e9%97%ae%e6%8e%a7%e5%88%b6","status":"publish","type":"post","link":"https:\/\/www.puzi7.net\/?p=550","title":{"rendered":"Swift \u8bbf\u95ee\u63a7\u5236"},"content":{"rendered":"<span itemprop=\"description\"><div class=\"article-body\">\n<div class=\"article-intro\" id=\"content\">\n<h1>Swift \u8bbf\u95ee\u63a7\u5236<\/h1>\n<p>\u8bbf\u95ee\u63a7\u5236\u53ef\u4ee5\u9650\u5b9a\u5176\u4ed6\u6e90\u6587\u4ef6\u6216\u6a21\u5757\u4e2d\u4ee3\u7801\u5bf9\u4f60\u4ee3\u7801\u7684\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u660e\u786e\u5730\u7ed9\u5355\u4e2a\u7c7b\u578b\uff08\u7c7b\u3001\u7ed3\u6784\u4f53\u3001\u679a\u4e3e\uff09\u8bbe\u7f6e\u8bbf\u95ee\u7ea7\u522b\uff0c\u4e5f\u53ef\u4ee5\u7ed9\u8fd9\u4e9b\u7c7b\u578b\u7684\u5c5e\u6027\u3001\u51fd\u6570\u3001\u521d\u59cb\u5316\u65b9\u6cd5\u3001\u57fa\u672c\u7c7b\u578b\u3001\u4e0b\u6807\u7d22\u5f15\u7b49\u8bbe\u7f6e\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<p>\u534f\u8bae\u4e5f\u53ef\u4ee5\u88ab\u9650\u5b9a\u5728\u4e00\u5b9a\u7684\u8303\u56f4\u5185\u4f7f\u7528\uff0c\u5305\u62ec\u534f\u8bae\u91cc\u7684\u5168\u5c40\u5e38\u91cf\u3001\u53d8\u91cf\u548c\u51fd\u6570\u3002<\/p>\n<p>\u8bbf\u95ee\u63a7\u5236\u57fa\u4e8e\u6a21\u5757\u4e0e\u6e90\u6587\u4ef6\u3002<\/p>\n<p>\u6a21\u5757\u6307\u7684\u662f\u4ee5\u72ec\u7acb\u5355\u5143\u6784\u5efa\u548c\u53d1\u5e03\u7684 Framework \u6216 Application\u3002\u5728 Swift \u4e2d\u7684\u4e00\u4e2a\u6a21\u5757\u53ef\u4ee5\u4f7f\u7528 import \u5173\u952e\u5b57\u5f15\u5165\u53e6\u5916\u4e00\u4e2a\u6a21\u5757\u3002<\/p>\n<p>\n\u6e90\u6587\u4ef6\u662f\u5355\u4e2a\u6e90\u7801\u6587\u4ef6\uff0c\u5b83\u901a\u5e38\u5c5e\u4e8e\u4e00\u4e2a\u6a21\u5757\uff0c \u6e90\u6587\u4ef6\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u7c7b\u548c\u51fd\u6570 \u7684\u5b9a\u4e49\u3002<\/p>\n<p>Swift \u4e3a\u4ee3\u7801\u4e2d\u7684\u5b9e\u4f53\u63d0\u4f9b\u4e86\u56db\u79cd\u4e0d\u540c\u7684\u8bbf\u95ee\u7ea7\u522b:public\u3001internal\u3001fileprivate\u3001private\u3002<\/p>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>\u8bbf\u95ee\u7ea7\u522b<\/th>\n<th>\u5b9a\u4e49<\/th>\n<\/tr>\n<tr>\n<td>public<\/td>\n<td>\u53ef\u4ee5\u8bbf\u95ee\u81ea\u5df1\u6a21\u5757\u4e2d\u6e90\u6587\u4ef6\u91cc\u7684\u4efb\u4f55\u5b9e\u4f53\uff0c\u522b\u4eba\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5f15\u5165\u8be5\u6a21\u5757\u6765\u8bbf\u95ee\u6e90\u6587\u4ef6\u91cc\u7684\u6240\u6709\u5b9e\u4f53\u3002<\/td>\n<\/tr>\n<tr>\n<td>internal<\/td>\n<td>\u53ef\u4ee5\u8bbf\u95ee\u81ea\u5df1\u6a21\u5757\u4e2d\u6e90\u6587\u4ef6\u91cc\u7684\u4efb\u4f55\u5b9e\u4f53\uff0c\u4f46\u662f\u522b\u4eba\u4e0d\u80fd\u8bbf\u95ee\u8be5\u6a21\u5757\u4e2d\u6e90\u6587\u4ef6\u91cc\u7684\u5b9e\u4f53\u3002<\/td>\n<\/tr>\n<tr>\n<td>fileprivate<\/td>\n<td>\u6587\u4ef6\u5185\u79c1\u6709\uff0c\u53ea\u80fd\u5728\u5f53\u524d\u6e90\u6587\u4ef6\u4e2d\u4f7f\u7528\u3002<\/td>\n<\/tr>\n<tr>\n<td>private<\/td>\n<td>\u53ea\u80fd\u5728\u7c7b\u4e2d\u8bbf\u95ee\uff0c\u79bb\u5f00\u4e86\u8fd9\u4e2a\u7c7b\u6216\u8005\u7ed3\u6784\u4f53\u7684\u4f5c\u7528\u57df\u5916\u9762\u5c31\u65e0\u6cd5\u8bbf\u95ee\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>public \u4e3a\u6700\u9ad8\u7ea7\u8bbf\u95ee\u7ea7\u522b\uff0cprivate \u4e3a\u6700\u4f4e\u7ea7\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<h3>\u8bed\u6cd5<\/h3>\n<p>\u901a\u8fc7\u4fee\u9970\u7b26public\u3001internal\u3001fileprivate\u3001private\u6765\u58f0\u660e\u5b9e\u4f53\u7684\u8bbf\u95ee\u7ea7\u522b\uff1a<\/p>\n<div class=\"example\">\n<h2 class=\"example_head\">\u5b9e\u4f8b<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-reserved\">public<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">SomePublicClass<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">internal<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">SomeInternalClass<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">fileprivate<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">SomeFilePrivateClass<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-reserved\">private<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">SomePrivateClass<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-reserved\">public<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">somePublicVariable<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-number\">0<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">internal<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">someInternalConstant<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-number\">0<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">fileprivate<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">someFilePrivateFunction<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-reserved\">private<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">somePrivateFunction<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-brackets\">}<\/span><\/div>\n<\/div>\n<\/div>\n<p>\u9664\u975e\u6709\u7279\u6b8a\u7684\u8bf4\u660e\uff0c\u5426\u5219\u5b9e\u4f53\u90fd\u4f7f\u7528\u9ed8\u8ba4\u7684\u8bbf\u95ee\u7ea7\u522b internal\u3002<\/p>\n<div class=\"example\">\n<h2 class=\"example_head\">\u672a\u6307\u5b9a\u8bbf\u95ee\u7ea7\u522b\u9ed8\u8ba4\u4e3a internal<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">SomeInternalClass<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\">              <\/span><span class=\"hl-comment\">\/\/ \u8bbf\u95ee\u7ea7\u522b\u4e3a internal<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">someInternalConstant<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-number\">0<\/span><span class=\"hl-code\">            <\/span><span class=\"hl-comment\">\/\/ \u8bbf\u95ee\u7ea7\u522b\u4e3a internal<\/span><\/div>\n<\/div>\n<\/div>\n<hr>\n<h2>\u51fd\u6570\u7c7b\u578b\u8bbf\u95ee\u6743\u9650<\/h2>\n<p>\u51fd\u6570\u7684\u8bbf\u95ee\u7ea7\u522b\u9700\u8981\u6839\u636e\u8be5\u51fd\u6570\u7684\u53c2\u6570\u7c7b\u578b\u548c\u8fd4\u56de\u7c7b\u578b\u7684\u8bbf\u95ee\u7ea7\u522b\u5f97\u51fa\u3002<\/p>\n<p>\u4e0b\u9762\u7684\u4f8b\u5b50\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3asomeFunction\u5168\u5c40\u51fd\u6570\uff0c\u5e76\u4e14\u6ca1\u6709\u660e\u786e\u5730\u7533\u660e\u5176\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<pre>\nfunc someFunction() -&gt; (SomeInternalClass, SomePrivateClass) {\n    \/\/ \u51fd\u6570\u5b9e\u73b0\n}\n<\/pre>\n<p>\u51fd\u6570\u4e2d\u5176\u4e2d\u4e00\u4e2a\u7c7b SomeInternalClass \u7684\u8bbf\u95ee\u7ea7\u522b\u662f internal\uff0c\u53e6\u4e00\u4e2a SomePrivateClass \u7684\u8bbf\u95ee\u7ea7\u522b\u662f private\u3002\u6240\u4ee5\u6839\u636e\u5143\u7ec4\u8bbf\u95ee\u7ea7\u522b\u7684\u539f\u5219\uff0c\u8be5\u5143\u7ec4\u7684\u8bbf\u95ee\u7ea7\u522b\u662f private\uff08\u5143\u7ec4\u7684\u8bbf\u95ee\u7ea7\u522b\u4e0e\u5143\u7ec4\u4e2d\u8bbf\u95ee\u7ea7\u522b\u6700\u4f4e\u7684\u7c7b\u578b\u4e00\u81f4\uff09\u3002<\/p>\n<p>\n\u56e0\u4e3a\u8be5\u51fd\u6570\u8fd4\u56de\u7c7b\u578b\u7684\u8bbf\u95ee\u7ea7\u522b\u662f private\uff0c\u6240\u4ee5\u4f60\u5fc5\u987b\u4f7f\u7528 private \u4fee\u9970\u7b26\uff0c\u660e\u786e\u7684\u58f0\u660e\u8be5\u51fd\u6570\uff1a<\/p>\n<pre>\nprivate func someFunction() -&gt; (SomeInternalClass, SomePrivateClass) {\n    \/\/ \u51fd\u6570\u5b9e\u73b0\n}\n<\/pre>\n<p>\n\u5c06\u8be5\u51fd\u6570\u7533\u660e\u4e3a public \u6216 internal\uff0c\u6216\u8005\u4f7f\u7528\u9ed8\u8ba4\u7684\u8bbf\u95ee\u7ea7\u522b internal \u90fd\u662f\u9519\u8bef\u7684\uff0c\u56e0\u4e3a\u5982\u679c\u8fd9\u6837\u4f60\u5c31\u65e0\u6cd5\u8bbf\u95ee private \u7ea7\u522b\u7684\u8fd4\u56de\u503c\u3002<\/p>\n<hr>\n<h2>\u679a\u4e3e\u7c7b\u578b\u8bbf\u95ee\u6743\u9650<\/h2>\n<p>\u679a\u4e3e\u4e2d\u6210\u5458\u7684\u8bbf\u95ee\u7ea7\u522b\u7ee7\u627f\u81ea\u8be5\u679a\u4e3e\uff0c\u4f60\u4e0d\u80fd\u4e3a\u679a\u4e3e\u4e2d\u7684\u6210\u5458\u5355\u72ec\u7533\u660e\u4e0d\u540c\u7684\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<h3>\u5b9e\u4f8b<\/h3>\n<p>\u6bd4\u5982\u4e0b\u9762\u7684\u4f8b\u5b50\uff0c\u679a\u4e3e Student \u88ab\u660e\u786e\u7684\u7533\u660e\u4e3a public \u7ea7\u522b\uff0c\u90a3\u4e48\u5b83\u7684\u6210\u5458 Name\uff0cMark \u7684\u8bbf\u95ee\u7ea7\u522b\u540c\u6837\u4e5f\u662f public\uff1a<\/p>\n<div class=\"example\">\n<h2 class=\"example_head\">\u5b9e\u4f8b<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-reserved\">public<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">enum<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Student<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-reserved\">case<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Name<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">String<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-reserved\">case<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Mark<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-code\">,<\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-code\">,<\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">studDetails<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">Student<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">Name<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">Swift<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">studMarks<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">Student<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">Mark<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-number\">98<\/span><span class=\"hl-code\">,<\/span><span class=\"hl-number\">97<\/span><span class=\"hl-code\">,<\/span><span class=\"hl-number\">95<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-reserved\">switch<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">studMarks<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-reserved\">case<\/span><span class=\"hl-code\"> .<\/span><span class=\"hl-identifier\">Name<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">studName<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\">:<br \/>\n    <\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u5b66\u751f\u540d: <\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(studName).<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-reserved\">case<\/span><span class=\"hl-code\"> .<\/span><span class=\"hl-identifier\">Mark<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Mark1<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Mark2<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Mark3<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\">:<br \/>\n    <\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u5b66\u751f\u6210\u7ee9: <\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(Mark1),<\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(Mark2),<\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(Mark3)<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><\/div>\n<\/div>\n<\/div>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n\u5b66\u751f\u6210\u7ee9: 98,97,95\n<\/pre>\n<hr>\n<h2>\u5b50\u7c7b\u8bbf\u95ee\u6743\u9650<br \/>\n<\/h2>\n<p>\u5b50\u7c7b\u7684\u8bbf\u95ee\u7ea7\u522b\u4e0d\u5f97\u9ad8\u4e8e\u7236\u7c7b\u7684\u8bbf\u95ee\u7ea7\u522b\u3002\u6bd4\u5982\u8bf4\uff0c\u7236\u7c7b\u7684\u8bbf\u95ee\u7ea7\u522b\u662finternal\uff0c\u5b50\u7c7b\u7684\u8bbf\u95ee\u7ea7\u522b\u5c31\u4e0d\u80fd\u7533\u660e\u4e3apublic\u3002<\/p>\n<div class=\"example\">\n<h2 class=\"example_head\">\u5b9e\u4f8b<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-reserved\">public<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">SuperClass<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">fileprivate<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">show<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u8d85\u7c7b<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-comment\">\/\/ \u8bbf\u95ee\u7ea7\u522b\u4e0d\u80fd\u4f4e\u4e8e\u8d85\u7c7b internal &gt; public<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">internal<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">SubClass<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">SuperClass<\/span><span class=\"hl-code\">  <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">override<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">internal<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">show<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u5b50\u7c7b<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">sup<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">SuperClass<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">sup<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">show<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">sub<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">SubClass<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">sub<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">show<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><\/div>\n<\/div>\n<\/div>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n\u8d85\u7c7b\n\u5b50\u7c7b\n<\/pre>\n<hr>\n<h2>\u5e38\u91cf\u3001\u53d8\u91cf\u3001\u5c5e\u6027\u3001\u4e0b\u6807\u8bbf\u95ee\u6743\u9650<\/h2>\n<p>\u5e38\u91cf\u3001\u53d8\u91cf\u3001\u5c5e\u6027\u4e0d\u80fd\u62e5\u6709\u6bd4\u5b83\u4eec\u7684\u7c7b\u578b\u66f4\u9ad8\u7684\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<p>\u6bd4\u5982\u8bf4\uff0c\u4f60\u5b9a\u4e49\u4e00\u4e2apublic\u7ea7\u522b\u7684\u5c5e\u6027\uff0c\u4f46\u662f\u5b83\u7684\u7c7b\u578b\u662fprivate\u7ea7\u522b\u7684\uff0c\u8fd9\u662f\u7f16\u8bd1\u5668\u6240\u4e0d\u5141\u8bb8\u7684\u3002<\/p>\n<p>\u540c\u6837\uff0c\u4e0b\u6807\u4e5f\u4e0d\u80fd\u62e5\u6709\u6bd4\u7d22\u5f15\u7c7b\u578b\u6216\u8fd4\u56de\u7c7b\u578b\u66f4\u9ad8\u7684\u8bbf\u95ee\u7ea7\u522b\u3002\n<\/p>\n<p>\n\u5982\u679c\u5e38\u91cf\u3001\u53d8\u91cf\u3001\u5c5e\u6027\u3001\u4e0b\u6807\u7d22\u5f15\u7684\u5b9a\u4e49\u7c7b\u578b\u662fprivate\u7ea7\u522b\u7684\uff0c\u90a3\u4e48\u5b83\u4eec\u5fc5\u987b\u8981\u660e\u786e\u7684\u7533\u660e\u8bbf\u95ee\u7ea7\u522b\u4e3aprivate:<\/p>\n<pre>private var privateInstance = SomePrivateClass()<\/pre>\n<hr>\n<h2>Getter \u548c Setter\u8bbf\u95ee\u6743\u9650<\/h2>\n<p>\u5e38\u91cf\u3001\u53d8\u91cf\u3001\u5c5e\u6027\u3001\u4e0b\u6807\u7d22\u5f15\u7684Getters\u548cSetters\u7684\u8bbf\u95ee\u7ea7\u522b\u7ee7\u627f\u81ea\u5b83\u4eec\u6240\u5c5e\u6210\u5458\u7684\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<p>Setter\u7684\u8bbf\u95ee\u7ea7\u522b\u53ef\u4ee5\u4f4e\u4e8e\u5bf9\u5e94\u7684Getter\u7684\u8bbf\u95ee\u7ea7\u522b\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u63a7\u5236\u53d8\u91cf\u3001\u5c5e\u6027\u6216\u4e0b\u6807\u7d22\u5f15\u7684\u8bfb\u5199\u6743\u9650\u3002<\/p>\n<div class=\"example\">\n<h2 class=\"example_head\">\u5b9e\u4f8b<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Samplepgm<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">fileprivate<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">counter<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-number\">0<\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">willSet<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">newTotal<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n            <\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u8ba1\u6570\u5668: <\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(newTotal)<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">didSet<\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n            <\/span><span class=\"hl-reserved\">if<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">counter<\/span><span class=\"hl-code\"> &gt; <\/span><span class=\"hl-identifier\">oldValue<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n                <\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u65b0\u589e\u52a0\u6570\u91cf <\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(counter &#8211; oldValue)<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n            <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">NewCounter<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">Samplepgm<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">NewCounter<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">counter<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-number\">100<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">NewCounter<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">counter<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-number\">800<\/span><\/div>\n<\/div>\n<\/div>\n<p>counter \u7684\u8bbf\u95ee\u7ea7\u522b\u4e3a fileprivate\uff0c\u5728\u6587\u4ef6\u5185\u53ef\u4ee5\u8bbf\u95ee\u3002<\/p>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n\u8ba1\u6570\u5668: 100\n\u65b0\u589e\u52a0\u6570\u91cf 100\n\u8ba1\u6570\u5668: 800\n\u65b0\u589e\u52a0\u6570\u91cf 700\n<\/pre>\n<hr>\n<h2>\u6784\u9020\u5668\u548c\u9ed8\u8ba4\u6784\u9020\u5668\u8bbf\u95ee\u6743\u9650<\/h2>\n<h3>\u521d\u59cb\u5316<\/h3>\n<p>\u6211\u4eec\u53ef\u4ee5\u7ed9\u81ea\u5b9a\u4e49\u7684\u521d\u59cb\u5316\u65b9\u6cd5\u7533\u660e\u8bbf\u95ee\u7ea7\u522b\uff0c\u4f46\u662f\u8981\u4e0d\u9ad8\u4e8e\u5b83\u6240\u5c5e\u7c7b\u7684\u8bbf\u95ee\u7ea7\u522b\u3002\u4f46\u5fc5\u8981\u6784\u9020\u5668\u4f8b\u5916\uff0c\u5b83\u7684\u8bbf\u95ee\u7ea7\u522b\u5fc5\u987b\u548c\u6240\u5c5e\u7c7b\u7684\u8bbf\u95ee\u7ea7\u522b\u76f8\u540c\u3002\n<\/p>\n<p>\n\u5982\u540c\u51fd\u6570\u6216\u65b9\u6cd5\u53c2\u6570\uff0c\u521d\u59cb\u5316\u65b9\u6cd5\u53c2\u6570\u7684\u8bbf\u95ee\u7ea7\u522b\u4e5f\u4e0d\u80fd\u4f4e\u4e8e\u521d\u59cb\u5316\u65b9\u6cd5\u7684\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<h3>\u9ed8\u8ba4\u521d\u59cb\u5316\u65b9\u6cd5<\/h3>\n<p>Swift\u4e3a\u7ed3\u6784\u4f53\u3001\u7c7b\u90fd\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9ed8\u8ba4\u7684\u65e0\u53c2\u521d\u59cb\u5316\u65b9\u6cd5\uff0c\u7528\u4e8e\u7ed9\u5b83\u4eec\u7684\u6240\u6709\u5c5e\u6027\u63d0\u4f9b\u8d4b\u503c\u64cd\u4f5c\uff0c\u4f46\u4e0d\u4f1a\u7ed9\u51fa\u5177\u4f53\u503c\u3002<\/p>\n<p>\u9ed8\u8ba4\u521d\u59cb\u5316\u65b9\u6cd5\u7684\u8bbf\u95ee\u7ea7\u522b\u4e0e\u6240\u5c5e\u7c7b\u578b\u7684\u8bbf\u95ee\u7ea7\u522b\u76f8\u540c\u3002<\/p>\n<h3>\u5b9e\u4f8b<\/h3>\n<p>\n\u5728\u6bcf\u4e2a\u5b50\u7c7b\u7684 init()  \u65b9\u6cd5\u524d\u4f7f\u7528 required \u5173\u952e\u5b57\u58f0\u660e\u8bbf\u95ee\u6743\u9650\u3002<\/p>\n<div class=\"example\">\n<h2 class=\"example_head\">\u5b9e\u4f8b<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">classA<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">required<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">init<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">a<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-number\">10<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">a<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">classB<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">classA<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">required<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">init<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">b<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-number\">30<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">b<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">res<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">classA<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">show<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">classB<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><\/div>\n<\/div>\n<\/div>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n10\n30\n10\n<\/pre>\n<hr>\n<h2>\u534f\u8bae\u8bbf\u95ee\u6743\u9650<\/h2>\n<p>\u5982\u679c\u60f3\u4e3a\u4e00\u4e2a\u534f\u8bae\u660e\u786e\u7684\u7533\u660e\u8bbf\u95ee\u7ea7\u522b\uff0c\u90a3\u4e48\u9700\u8981\u6ce8\u610f\u4e00\u70b9\uff0c\u5c31\u662f\u4f60\u8981\u786e\u4fdd\u8be5\u534f\u8bae\u53ea\u5728\u4f60\u7533\u660e\u7684\u8bbf\u95ee\u7ea7\u522b\u4f5c\u7528\u57df\u4e2d\u4f7f\u7528\u3002<\/p>\n<p>\u5982\u679c\u4f60\u5b9a\u4e49\u4e86\u4e00\u4e2apublic\u8bbf\u95ee\u7ea7\u522b\u7684\u534f\u8bae\uff0c\u90a3\u4e48\u5b9e\u73b0\u8be5\u534f\u8bae\u63d0\u4f9b\u7684\u5fc5\u8981\u51fd\u6570\u4e5f\u4f1a\u662fpublic\u7684\u8bbf\u95ee\u7ea7\u522b\u3002\u8fd9\u4e00\u70b9\u4e0d\u540c\u4e8e\u5176\u4ed6\u7c7b\u578b\uff0c\u6bd4\u5982\uff0cpublic\u8bbf\u95ee\u7ea7\u522b\u7684\u5176\u4ed6\u7c7b\u578b\uff0c\u4ed6\u4eec\u6210\u5458\u7684\u8bbf\u95ee\u7ea7\u522b\u4e3ainternal\u3002<\/p>\n<div class=\"example\">\n<h2 class=\"example_head\">\u5b9e\u4f8b<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-reserved\">public<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">protocol<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">TcpProtocol<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">init<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-reserved\">public<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">MainClass<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-comment\">\/\/ local storage<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">init<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">self<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-comment\">\/\/ initialization<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-types\">class<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">SubClass<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">MainClass<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">TcpProtocol<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">no2<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">init<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">no2<\/span><span class=\"hl-code\"> : <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">self<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">no2<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">no2<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">super<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">init<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">:<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p>    <\/span><span class=\"hl-comment\">\/\/ Requires only one parameter for convenient method<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">required<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">override<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">convenience<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">init<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\">  <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">self<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">init<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">:<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">no2<\/span><span class=\"hl-code\">:<\/span><span class=\"hl-number\">0<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">res<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">MainClass<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-number\">20<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">show<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">SubClass<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">no1<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-number\">30<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">no2<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-number\">50<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">res is: <\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(res.no1)<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">res is: <\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(show.no1)<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">res is: <\/span><span class=\"hl-special\">\\<\/span><span class=\"hl-string\">(show.no2)<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><\/div>\n<\/div>\n<\/div>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\nres is: 20\nres is: 30\nres is: 50\n<\/pre>\n<hr>\n<h2>\u6269\u5c55\u8bbf\u95ee\u6743\u9650<\/h2>\n<p>\u4f60\u53ef\u4ee5\u5728\u6761\u4ef6\u5141\u8bb8\u7684\u60c5\u51b5\u4e0b\u5bf9\u7c7b\u3001\u7ed3\u6784\u4f53\u3001\u679a\u4e3e\u8fdb\u884c\u6269\u5c55\u3002\u6269\u5c55\u6210\u5458\u5e94\u8be5\u5177\u6709\u548c\u539f\u59cb\u7c7b\u6210\u5458\u4e00\u81f4\u7684\u8bbf\u95ee\u7ea7\u522b\u3002\u6bd4\u5982\u4f60\u6269\u5c55\u4e86\u4e00\u4e2a\u516c\u5171\u7c7b\u578b\uff0c\u90a3\u4e48\u4f60\u65b0\u52a0\u7684\u6210\u5458\u5e94\u8be5\u5177\u6709\u548c\u539f\u59cb\u6210\u5458\u4e00\u6837\u7684\u9ed8\u8ba4\u7684internal\u8bbf\u95ee\u7ea7\u522b\u3002\n<\/p>\n<\/p>\n<p>\n\u6216\u8005\uff0c\u4f60\u53ef\u4ee5\u660e\u786e\u7533\u660e\u6269\u5c55\u7684\u8bbf\u95ee\u7ea7\u522b\uff08\u6bd4\u5982\u4f7f\u7528private extension\uff09\u7ed9\u8be5\u6269\u5c55\u5185\u6240\u6709\u6210\u5458\u7533\u660e\u4e00\u4e2a\u65b0\u7684\u9ed8\u8ba4\u8bbf\u95ee\u7ea7\u522b\u3002\u8fd9\u4e2a\u65b0\u7684\u9ed8\u8ba4\u8bbf\u95ee\u7ea7\u522b\u4ecd\u7136\u53ef\u4ee5\u88ab\u5355\u72ec\u6210\u5458\u6240\u7533\u660e\u7684\u8bbf\u95ee\u7ea7\u522b\u6240\u8986\u76d6\u3002<\/p>\n<hr>\n<h2>\u6cdb\u578b\u8bbf\u95ee\u6743\u9650<\/h2>\n<p>\u6cdb\u578b\u7c7b\u578b\u6216\u6cdb\u578b\u51fd\u6570\u7684\u8bbf\u95ee\u7ea7\u522b\u53d6\u6cdb\u578b\u7c7b\u578b\u3001\u51fd\u6570\u672c\u8eab\u3001\u6cdb\u578b\u7c7b\u578b\u53c2\u6570\u4e09\u8005\u4e2d\u7684\u6700\u4f4e\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<div class=\"example\">\n<h2 class=\"example_head\">\u5b9e\u4f8b<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-reserved\">public<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-types\">struct<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">TOS<\/span><span class=\"hl-code\">&lt;<\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-code\">&gt; <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-brackets\">[<\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-brackets\">]<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-reserved\">private<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">mutating<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">item<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">append<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">item<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p>    <\/span><span class=\"hl-identifier\">mutating<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">pop<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> -&gt; <\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-reserved\">return<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">removeLast<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">TOS<\/span><span class=\"hl-code\">&lt;<\/span><span class=\"hl-identifier\">String<\/span><span class=\"hl-code\">&gt;<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">Swift<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u6cdb\u578b<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u7c7b\u578b\u53c2\u6570<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u7c7b\u578b\u53c2\u6570\u540d<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">let<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">deletetos<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">pop<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><\/div>\n<\/div>\n<\/div>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n[\"Swift\"]\n[\"Swift\", \"\u6cdb\u578b\"]\n[\"Swift\", \"\u6cdb\u578b\", \"\u7c7b\u578b\u53c2\u6570\"]\n[\"Swift\", \"\u6cdb\u578b\", \"\u7c7b\u578b\u53c2\u6570\", \"\u7c7b\u578b\u53c2\u6570\u540d\"]\n<\/pre>\n<hr>\n<h2>\u7c7b\u578b\u522b\u540d<\/h2>\n<p>\u4efb\u4f55\u4f60\u5b9a\u4e49\u7684\u7c7b\u578b\u522b\u540d\u90fd\u4f1a\u88ab\u5f53\u4f5c\u4e0d\u540c\u7684\u7c7b\u578b\uff0c\u4ee5\u4fbf\u4e8e\u8fdb\u884c\u8bbf\u95ee\u63a7\u5236\u3002\u4e00\u4e2a\u7c7b\u578b\u522b\u540d\u7684\u8bbf\u95ee\u7ea7\u522b\u4e0d\u53ef\u9ad8\u4e8e\u539f\u7c7b\u578b\u7684\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<p>\u6bd4\u5982\u8bf4\uff0c\u4e00\u4e2aprivate\u7ea7\u522b\u7684\u7c7b\u578b\u522b\u540d\u53ef\u4ee5\u8bbe\u5b9a\u7ed9\u4e00\u4e2apublic\u3001internal\u3001private\u7684\u7c7b\u578b\uff0c\u4f46\u662f\u4e00\u4e2apublic\u7ea7\u522b\u7684\u7c7b\u578b\u522b\u540d\u53ea\u80fd\u8bbe\u5b9a\u7ed9\u4e00\u4e2apublic\u7ea7\u522b\u7684\u7c7b\u578b\uff0c\u4e0d\u80fd\u8bbe\u5b9a\u7ed9internal\u6216private \u7ea7\u522b\u7684\u7c7b\u578b\u3002<\/p>\n<blockquote>\n<p>\u6ce8\u610f\uff1a\u8fd9\u6761\u89c4\u5219\u4e5f\u9002\u7528\u4e8e\u4e3a\u6ee1\u8db3\u534f\u8bae\u4e00\u81f4\u6027\u800c\u7ed9\u76f8\u5173\u7c7b\u578b\u547d\u540d\u522b\u540d\u7684\u60c5\u51b5\u3002<\/p>\n<\/blockquote>\n<div class=\"example\">\n<h2 class=\"example_head\">\u5b9e\u4f8b<\/h2>\n<div class=\"example_code\">\n<div class=\"hl-main\"><span class=\"hl-reserved\">public<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">protocol<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Container<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">typealias<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">ItemType<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">mutating<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">append<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">item<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">ItemType<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">count<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">get<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">subscript<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">i<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> -&gt; <\/span><span class=\"hl-identifier\">ItemType<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">get<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-types\">struct<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">Stack<\/span><span class=\"hl-code\">&lt;<\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-code\">&gt;: <\/span><span class=\"hl-identifier\">Container<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-comment\">\/\/ original Stack&lt;T&gt; implementation<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-brackets\">[<\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-brackets\">]<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">mutating<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">item<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">append<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">item<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p>    <\/span><span class=\"hl-identifier\">mutating<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">pop<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> -&gt; <\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-reserved\">return<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">removeLast<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p>    <\/span><span class=\"hl-comment\">\/\/ conformance to the Container protocol<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">mutating<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">append<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">item<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-identifier\">self<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">item<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p>    <\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">count<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-reserved\">return<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">count<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p>    <\/span><span class=\"hl-identifier\">subscript<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">i<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Int<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> -&gt; <\/span><span class=\"hl-identifier\">T<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-reserved\">return<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-brackets\">[<\/span><span class=\"hl-identifier\">i<\/span><span class=\"hl-brackets\">]<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">func<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">allItemsMatch<\/span><span class=\"hl-code\">&lt;<br \/>\n    <\/span><span class=\"hl-identifier\">C1<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Container<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">C2<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Container<\/span><span class=\"hl-code\"><br \/>\n    <\/span><span class=\"hl-identifier\">where<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">C1<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">ItemType<\/span><span class=\"hl-code\"> == <\/span><span class=\"hl-identifier\">C2<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">ItemType<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">C1<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">ItemType<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">Equatable<\/span><span class=\"hl-code\">&gt;<br \/>\n    <\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">someContainer<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">C1<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-identifier\">anotherContainer<\/span><span class=\"hl-code\">: <\/span><span class=\"hl-identifier\">C2<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"> -&gt; <\/span><span class=\"hl-identifier\">Bool<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-comment\">\/\/ check that both containers contain the same number of items<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-reserved\">if<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">someContainer<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">count<\/span><span class=\"hl-code\"> != <\/span><span class=\"hl-identifier\">anotherContainer<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">count<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n            <\/span><span class=\"hl-reserved\">return<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-reserved\">false<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p>        <\/span><span class=\"hl-comment\">\/\/ check each pair of items to see if they are equivalent<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-reserved\">for<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">i<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">in<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-number\">0<\/span><span class=\"hl-code\">..&lt;<\/span><span class=\"hl-identifier\">someContainer<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">count<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n            <\/span><span class=\"hl-reserved\">if<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">someContainer<\/span><span class=\"hl-brackets\">[<\/span><span class=\"hl-identifier\">i<\/span><span class=\"hl-brackets\">]<\/span><span class=\"hl-code\"> != <\/span><span class=\"hl-identifier\">anotherContainer<\/span><span class=\"hl-brackets\">[<\/span><span class=\"hl-identifier\">i<\/span><span class=\"hl-brackets\">]<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-brackets\">{<\/span><span class=\"hl-code\"><br \/>\n                <\/span><span class=\"hl-reserved\">return<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-reserved\">false<\/span><span class=\"hl-code\"><br \/>\n            <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p>        <\/span><span class=\"hl-comment\">\/\/ all items match, so return true<\/span><span class=\"hl-comment\"><\/span><span class=\"hl-code\"><br \/>\n        <\/span><span class=\"hl-reserved\">return<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-reserved\">true<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-brackets\">}<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-identifier\">Stack<\/span><span class=\"hl-code\">&lt;<\/span><span class=\"hl-identifier\">String<\/span><span class=\"hl-code\">&gt;<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">Swift<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u6cdb\u578b<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">push<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">Where \u8bed\u53e5<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">tos<\/span><span class=\"hl-code\">.<\/span><span class=\"hl-identifier\">items<\/span><span class=\"hl-brackets\">)<\/span><span class=\"hl-code\"><\/p>\n<p><\/span><span class=\"hl-identifier\">var<\/span><span class=\"hl-code\"> <\/span><span class=\"hl-identifier\">eos<\/span><span class=\"hl-code\"> = <\/span><span class=\"hl-brackets\">[<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">Swift<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">\u6cdb\u578b<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-code\">, <\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-string\">Where \u8bed\u53e5<\/span><span class=\"hl-quotes\">&#8220;<\/span><span class=\"hl-brackets\">]<\/span><span class=\"hl-code\"><br \/>\n<\/span><span class=\"hl-identifier\">print<\/span><span class=\"hl-brackets\">(<\/span><span class=\"hl-identifier\">eos<\/span><span class=\"hl-brackets\">)<\/span><\/div>\n<\/div>\n<\/div>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n[\"Swift\"]\n[\"Swift\", \"\u6cdb\u578b\"]\n[\"Swift\", \"\u6cdb\u578b\", \"Where \u8bed\u53e5\"]\n[\"Swift\", \"\u6cdb\u578b\", \"Where \u8bed\u53e5\"]\n<\/pre>\n<\/p><\/div>\n<\/p><\/div>\n<span>","protected":false},"excerpt":{"rendered":"<p class=\"excerpt\"><span itemprop=\"description\">Swift \u8bbf\u95ee\u63a7\u5236 \u8bbf\u95ee\u63a7\u5236\u53ef\u4ee5\u9650\u5b9a\u5176\u4ed6\u6e90\u6587\u4ef6\u6216\u6a21\u5757\u4e2d\u4ee3\u7801\u5bf9\u4f60\u4ee3\u7801\u7684\u8bbf\u95ee\u7ea7\u522b\u3002 \u4f60\u53ef\u4ee5\u660e&hellip;<\/span><\/p>\n<p class=\"more-link-p btn-align-right\"><a class=\"green zoom-btn\" href=\"https:\/\/www.puzi7.net\/?p=550\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26,28],"tags":[74,119],"class_list":["post-550","post","type-post","status-publish","format-standard","hentry","category-mobile","category-swift","tag-ios","tag-swift","zoom-theme-has-thumb"],"_links":{"self":[{"href":"https:\/\/www.puzi7.net\/index.php?rest_route=\/wp\/v2\/posts\/550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.puzi7.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.puzi7.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=550"}],"version-history":[{"count":0,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=\/wp\/v2\/posts\/550\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}