{"id":540,"date":"2018-02-23T23:39:06","date_gmt":"2018-02-23T15:39:06","guid":{"rendered":"http:\/\/60.205.208.74\/2018\/02\/23\/swift-%e4%b8%8b%e6%a0%87%e8%84%9a%e6%9c%ac\/"},"modified":"2018-02-23T23:39:06","modified_gmt":"2018-02-23T15:39:06","slug":"swift-%e4%b8%8b%e6%a0%87%e8%84%9a%e6%9c%ac","status":"publish","type":"post","link":"https:\/\/www.puzi7.net\/?p=540","title":{"rendered":"Swift \u4e0b\u6807\u811a\u672c"},"content":{"rendered":"<span itemprop=\"description\"><div class=\"article-body\">\n<div class=\"article-intro\" id=\"content\">\n<h1>Swift \u4e0b\u6807\u811a\u672c<\/h1>\n<p>\u4e0b\u6807\u811a\u672c \u53ef\u4ee5\u5b9a\u4e49\u5728\u7c7b\uff08Class\uff09\u3001\u7ed3\u6784\u4f53\uff08structure\uff09\u548c\u679a\u4e3e\uff08enumeration\uff09\u8fd9\u4e9b\u76ee\u6807\u4e2d\uff0c\u53ef\u4ee5\u8ba4\u4e3a\u662f\u8bbf\u95ee\u5bf9\u8c61\u3001\u96c6\u5408\u6216\u5e8f\u5217\u7684\u5feb\u6377\u65b9\u5f0f\uff0c\u4e0d\u9700\u8981\u518d\u8c03\u7528\u5b9e\u4f8b\u7684\u7279\u5b9a\u7684\u8d4b\u503c\u548c\u8bbf\u95ee\u65b9\u6cd5\u3002<\/p>\n<p>\u4e3e\u4f8b\u6765\u8bf4\uff0c\u7528\u4e0b\u6807\u811a\u672c\u8bbf\u95ee\u4e00\u4e2a\u6570\u7ec4(Array)\u5b9e\u4f8b\u4e2d\u7684\u5143\u7d20\u53ef\u4ee5\u8fd9\u6837\u5199 someArray[index] \uff0c\u8bbf\u95ee\u5b57\u5178(Dictionary)\u5b9e\u4f8b\u4e2d\u7684\u5143\u7d20\u53ef\u4ee5\u8fd9\u6837\u5199 someDictionary[key]\u3002<\/p>\n<p>\u5bf9\u4e8e\u540c\u4e00\u4e2a\u76ee\u6807\u53ef\u4ee5\u5b9a\u4e49\u591a\u4e2a\u4e0b\u6807\u811a\u672c\uff0c\u901a\u8fc7\u7d22\u5f15\u503c\u7c7b\u578b\u7684\u4e0d\u540c\u6765\u8fdb\u884c\u91cd\u8f7d\uff0c\u800c\u4e14\u7d22\u5f15\u503c\u7684\u4e2a\u6570\u53ef\u4ee5\u662f\u591a\u4e2a\u3002<\/p>\n<hr>\n<h2>\u4e0b\u6807\u811a\u672c\u8bed\u6cd5\u53ca\u5e94\u7528<\/p>\n<h3>\u8bed\u6cd5<\/h3>\n<\/h2>\n<p>\u4e0b\u6807\u811a\u672c\u5141\u8bb8\u4f60\u901a\u8fc7\u5728\u5b9e\u4f8b\u540e\u9762\u7684\u65b9\u62ec\u53f7\u4e2d\u4f20\u5165\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u7684\u7d22\u5f15\u503c\u6765\u5bf9\u5b9e\u4f8b\u8fdb\u884c\u8bbf\u95ee\u548c\u8d4b\u503c\u3002<\/p>\n<p>\u8bed\u6cd5\u7c7b\u4f3c\u4e8e\u5b9e\u4f8b\u65b9\u6cd5\u548c\u8ba1\u7b97\u578b\u5c5e\u6027\u7684\u6df7\u5408\u3002<\/p>\n<p>\u4e0e\u5b9a\u4e49\u5b9e\u4f8b\u65b9\u6cd5\u7c7b\u4f3c\uff0c\u5b9a\u4e49\u4e0b\u6807\u811a\u672c\u4f7f\u7528subscript\u5173\u952e\u5b57\uff0c\u663e\u5f0f\u58f0\u660e\u5165\u53c2\uff08\u4e00\u4e2a\u6216\u591a\u4e2a\uff09\u548c\u8fd4\u56de\u7c7b\u578b\u3002<\/p>\n<p>\u4e0e\u5b9e\u4f8b\u65b9\u6cd5\u4e0d\u540c\u7684\u662f\u4e0b\u6807\u811a\u672c\u53ef\u4ee5\u8bbe\u5b9a\u4e3a\u8bfb\u5199\u6216\u53ea\u8bfb\u3002\u8fd9\u79cd\u65b9\u5f0f\u53c8\u6709\u70b9\u50cf\u8ba1\u7b97\u578b\u5c5e\u6027\u7684getter\u548csetter\uff1a<\/p>\n<pre>\nsubscript(index: Int) -&gt; Int {\n    get {\n        \/\/ \u7528\u4e8e\u4e0b\u6807\u811a\u672c\u503c\u7684\u58f0\u660e\n    }\n    set(newValue) {\n        \/\/ \u6267\u884c\u8d4b\u503c\u64cd\u4f5c\n    }\n}\n<\/pre>\n<h3>\u5b9e\u4f8b 1<\/h3>\n<pre>\nimport Cocoa\n\nstruct subexample {\n    let decrementer: Int\n    subscript(index: Int) -&gt; Int {\n        return decrementer \/ index\n    }\n}\nlet division = subexample(decrementer: 100)\n\nprint(\"100 \u9664\u4ee5 9 \u7b49\u4e8e \\(division[9])\")\nprint(\"100 \u9664\u4ee5 2 \u7b49\u4e8e \\(division[2])\")\nprint(\"100 \u9664\u4ee5 3 \u7b49\u4e8e \\(division[3])\")\nprint(\"100 \u9664\u4ee5 5 \u7b49\u4e8e \\(division[5])\")\nprint(\"100 \u9664\u4ee5 7 \u7b49\u4e8e \\(division[7])\")\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n100 \u9664\u4ee5 9 \u7b49\u4e8e 11\n100 \u9664\u4ee5 2 \u7b49\u4e8e 50\n100 \u9664\u4ee5 3 \u7b49\u4e8e 33\n100 \u9664\u4ee5 5 \u7b49\u4e8e 20\n100 \u9664\u4ee5 7 \u7b49\u4e8e 14\n<\/pre>\n<p>\u5728\u4e0a\u4f8b\u4e2d\uff0c\u901a\u8fc7 subexample \u7ed3\u6784\u4f53\u521b\u5efa\u4e86\u4e00\u4e2a\u9664\u6cd5\u8fd0\u7b97\u7684\u5b9e\u4f8b\u3002\u6570\u503c 100 \u4f5c\u4e3a\u7ed3\u6784\u4f53\u6784\u9020\u51fd\u6570\u4f20\u5165\u53c2\u6570\u521d\u59cb\u5316\u5b9e\u4f8b\u6210\u5458 decrementer\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u4e0b\u6807\u811a\u672c\u6765\u5f97\u5230\u7ed3\u679c\uff0c\u6bd4\u5982 division[2] \u5373\u4e3a 100 \u9664\u4ee5 2\u3002<\/p>\n<h3>\u5b9e\u4f8b 2<\/h3>\n<pre>\nimport Cocoa\n\nclass daysofaweek {\n    private var days = [\"Sunday\", \"Monday\", \"Tuesday\", \"Wednesday\",\n        \"Thursday\", \"Friday\", \"saturday\"]\n    subscript(index: Int) -&gt; String {\n        get {\n            return days[index]   \/\/ \u58f0\u660e\u4e0b\u6807\u811a\u672c\u7684\u503c\n        }\n        set(newValue) {\n            self.days[index] = newValue   \/\/ \u6267\u884c\u8d4b\u503c\u64cd\u4f5c\n        }\n    }\n}\nvar p = daysofaweek()\n\nprint(p[0])\nprint(p[1])\nprint(p[2])\nprint(p[3])\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\nSunday\nMonday\nTuesday\nWednesday\n<\/pre>\n<h3>\u7528\u6cd5<\/h3>\n<p>\n\u6839\u636e\u4f7f\u7528\u573a\u666f\u4e0d\u540c\u4e0b\u6807\u811a\u672c\u4e5f\u5177\u6709\u4e0d\u540c\u7684\u542b\u4e49\u3002<\/p>\n<p>\u901a\u5e38\u4e0b\u6807\u811a\u672c\u662f\u7528\u6765\u8bbf\u95ee\u96c6\u5408\uff08collection\uff09\uff0c\u5217\u8868\uff08list\uff09\u6216\u5e8f\u5217\uff08sequence\uff09\u4e2d\u5143\u7d20\u7684\u5feb\u6377\u65b9\u5f0f\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u5728\u4f60\u81ea\u5df1\u7279\u5b9a\u7684\u7c7b\u6216\u7ed3\u6784\u4f53\u4e2d\u81ea\u7531\u7684\u5b9e\u73b0\u4e0b\u6807\u811a\u672c\u6765\u63d0\u4f9b\u5408\u9002\u7684\u529f\u80fd\u3002\n<\/p>\n<p>\n\u4f8b\u5982\uff0cSwift \u7684\u5b57\u5178\uff08Dictionary\uff09\u5b9e\u73b0\u4e86\u901a\u8fc7\u4e0b\u6807\u811a\u672c\u5bf9\u5176\u5b9e\u4f8b\u4e2d\u5b58\u653e\u7684\u503c\u8fdb\u884c\u5b58\u53d6\u64cd\u4f5c\u3002\u5728\u4e0b\u6807\u811a\u672c\u4e2d\u4f7f\u7528\u548c\u5b57\u5178\u7d22\u5f15\u76f8\u540c\u7c7b\u578b\u7684\u503c\uff0c\u5e76\u4e14\u628a\u4e00\u4e2a\u5b57\u5178\u503c\u7c7b\u578b\u7684\u503c\u8d4b\u503c\u7ed9\u8fd9\u4e2a\u4e0b\u6807\u811a\u6765\u4e3a\u5b57\u5178\u8bbe\u503c\uff1a<\/p>\n<pre>\nimport Cocoa\n\nvar numberOfLegs = [\"spider\": 8, \"ant\": 6, \"cat\": 4]\nnumberOfLegs[\"bird\"] = 2\n\nprint(numberOfLegs)\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n[\"ant\": 6, \"bird\": 2, \"cat\": 4, \"spider\": 8]\n<\/pre>\n<p>\u4e0a\u4f8b\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3anumberOfLegs\u7684\u53d8\u91cf\u5e76\u7528\u4e00\u4e2a\u5b57\u5178\u5b57\u9762\u91cf\u521d\u59cb\u5316\u51fa\u4e86\u5305\u542b\u4e09\u5bf9\u952e\u503c\u7684\u5b57\u5178\u5b9e\u4f8b\u3002numberOfLegs\u7684\u5b57\u5178\u5b58\u653e\u503c\u7c7b\u578b\u63a8\u65ad\u4e3aDictionary<string int>\u3002\u5b57\u5178\u5b9e\u4f8b\u521b\u5efa\u5b8c\u6210\u4e4b\u540e\u901a\u8fc7\u4e0b\u6807\u811a\u672c\u7684\u65b9\u5f0f\u5c06\u6574\u578b\u503c2\u8d4b\u503c\u5230\u5b57\u5178\u5b9e\u4f8b\u7684\u7d22\u5f15\u4e3abird\u7684\u4f4d\u7f6e\u4e2d\u3002<\/string><\/p>\n<hr>\n<h2>\u4e0b\u6807\u811a\u672c\u9009\u9879<\/h2>\n<p>\u4e0b\u6807\u811a\u672c\u5141\u8bb8\u4efb\u610f\u6570\u91cf\u7684\u5165\u53c2\u7d22\u5f15\uff0c\u5e76\u4e14\u6bcf\u4e2a\u5165\u53c2\u7c7b\u578b\u4e5f\u6ca1\u6709\u9650\u5236\u3002<\/p>\n<p>\u4e0b\u6807\u811a\u672c\u7684\u8fd4\u56de\u503c\u4e5f\u53ef\u4ee5\u662f\u4efb\u4f55\u7c7b\u578b\u3002<\/p>\n<p>\u4e0b\u6807\u811a\u672c\u53ef\u4ee5\u4f7f\u7528\u53d8\u91cf\u53c2\u6570\u548c\u53ef\u53d8\u53c2\u6570\u3002<\/p>\n<p>\u4e00\u4e2a\u7c7b\u6216\u7ed3\u6784\u4f53\u53ef\u4ee5\u6839\u636e\u81ea\u8eab\u9700\u8981\u63d0\u4f9b\u591a\u4e2a\u4e0b\u6807\u811a\u672c\u5b9e\u73b0\uff0c\u5728\u5b9a\u4e49\u4e0b\u6807\u811a\u672c\u65f6\u901a\u8fc7\u4f20\u5165\u53c2\u6570\u7684\u7c7b\u578b\u8fdb\u884c\u533a\u5206\uff0c\u4f7f\u7528\u4e0b\u6807\u811a\u672c\u65f6\u4f1a\u81ea\u52a8\u5339\u914d\u5408\u9002\u7684\u4e0b\u6807\u811a\u672c\u5b9e\u73b0\u8fd0\u884c\uff0c\u8fd9\u5c31\u662f<b>\u4e0b\u6807\u811a\u672c\u7684\u91cd\u8f7d<\/b>\u3002<\/p>\n<pre>\nimport Cocoa\n\nstruct Matrix {\n    let rows: Int, columns: Int\n    var print: [Double]\n    init(rows: Int, columns: Int) {\n        self.rows = rows\n        self.columns = columns\n        print = Array(repeating: 0.0, count: rows * columns)\n    }\n    subscript(row: Int, column: Int) -&gt; Double {\n        get {\n            return print[(row * columns) + column]\n        }\n        set {\n            print[(row * columns) + column] = newValue\n        }\n    }\n}\n\/\/ \u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684 3 \u884c 3 \u5217\u7684Matrix\u5b9e\u4f8b\nvar mat = Matrix(rows: 3, columns: 3)\n\n\/\/ \u901a\u8fc7\u4e0b\u6807\u811a\u672c\u8bbe\u7f6e\u503c\nmat[0,0] = 1.0\nmat[0,1] = 2.0\nmat[1,0] = 3.0\nmat[1,1] = 5.0\n\n\/\/ \u901a\u8fc7\u4e0b\u6807\u811a\u672c\u83b7\u53d6\u503c\nprint(\"\\(mat[0,0])\")\nprint(\"\\(mat[0,1])\")\nprint(\"\\(mat[1,0])\")\nprint(\"\\(mat[1,1])\")\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n1.0\n2.0\n3.0\n5.0\n<\/pre>\n<p>\nMatrix \u7ed3\u6784\u4f53\u63d0\u4f9b\u4e86\u4e00\u4e2a\u4e24\u4e2a\u4f20\u5165\u53c2\u6570\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u4e24\u4e2a\u53c2\u6570\u5206\u522b\u662frows\u548ccolumns\uff0c\u521b\u5efa\u4e86\u4e00\u4e2a\u8db3\u591f\u5bb9\u7eb3rows * columns\u4e2a\u6570\u7684Double\u7c7b\u578b\u6570\u7ec4\u3002\u4e3a\u4e86\u5b58\u50a8\uff0c\u5c06\u6570\u7ec4\u7684\u5927\u5c0f\u548c\u6570\u7ec4\u6bcf\u4e2a\u5143\u7d20\u521d\u59cb\u503c0.0\u3002\n<\/p>\n<p>\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f20\u5165\u5408\u9002\u7684row\u548ccolumn\u7684\u6570\u91cf\u6765\u6784\u9020\u4e00\u4e2a\u65b0\u7684Matrix\u5b9e\u4f8b\u3002<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<span>","protected":false},"excerpt":{"rendered":"<p class=\"excerpt\"><span itemprop=\"description\">Swift \u4e0b\u6807\u811a\u672c \u4e0b\u6807\u811a\u672c \u53ef\u4ee5\u5b9a\u4e49\u5728\u7c7b\uff08Class\uff09\u3001\u7ed3\u6784\u4f53\uff08structure\uff09\u548c&hellip;<\/span><\/p>\n<p class=\"more-link-p btn-align-right\"><a class=\"green zoom-btn\" href=\"https:\/\/www.puzi7.net\/?p=540\">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-540","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\/540","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=540"}],"version-history":[{"count":0,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=\/wp\/v2\/posts\/540\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}