{"id":549,"date":"2018-02-23T23:39:14","date_gmt":"2018-02-23T15:39:14","guid":{"rendered":"http:\/\/60.205.208.74\/2018\/02\/23\/swift-%e6%b3%9b%e5%9e%8b\/"},"modified":"2018-02-23T23:39:14","modified_gmt":"2018-02-23T15:39:14","slug":"swift-%e6%b3%9b%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/www.puzi7.net\/?p=549","title":{"rendered":"Swift \u6cdb\u578b"},"content":{"rendered":"
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Swift \u6cdb\u578b<\/h1>\n

Swift \u63d0\u4f9b\u4e86\u6cdb\u578b\u8ba9\u4f60\u5199\u51fa\u7075\u6d3b\u4e14\u53ef\u91cd\u7528\u7684\u51fd\u6570\u548c\u7c7b\u578b\u3002<\/p>\n

Swift \u6807\u51c6\u5e93\u662f\u901a\u8fc7\u6cdb\u578b\u4ee3\u7801\u6784\u5efa\u51fa\u6765\u7684\u3002<\/p>\n

Swift \u7684\u6570\u7ec4\u548c\u5b57\u5178\u7c7b\u578b\u90fd\u662f\u6cdb\u578b\u96c6\u3002<\/p>\n

\u4f60\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2aInt\u6570\u7ec4\uff0c\u4e5f\u53ef\u521b\u5efa\u4e00\u4e2aString\u6570\u7ec4\uff0c\u6216\u8005\u751a\u81f3\u4e8e\u53ef\u4ee5\u662f\u4efb\u4f55\u5176\u4ed6 Swift \u7684\u7c7b\u578b\u6570\u636e\u6570\u7ec4\u3002<\/p>\n

\u4ee5\u4e0b\u5b9e\u4f8b\u662f\u4e00\u4e2a\u975e\u6cdb\u578b\u51fd\u6570 exchange \u7528\u6765\u4ea4\u6362\u4e24\u4e2a Int \u503c\uff1a<\/p>\n

\n

\u5b9e\u4f8b<\/h2>\n
\n
\/\/ \u5b9a\u4e49\u4e00\u4e2a\u4ea4\u6362\u4e24\u4e2a\u53d8\u91cf\u7684\u51fd\u6570<\/span><\/span>
\n<\/span>func<\/span> <\/span>swapTwoInts<\/span>(<\/span>_<\/span> <\/span>a<\/span>: <\/span>inout<\/span> <\/span>Int<\/span>, <\/span>_<\/span> <\/span>b<\/span>: <\/span>inout<\/span> <\/span>Int<\/span>)<\/span> <\/span>{<\/span>
\n <\/span>let<\/span> <\/span>temporaryA<\/span> = <\/span>a<\/span>
\n <\/span>a<\/span> = <\/span>b<\/span>
\n <\/span>b<\/span> = <\/span>temporaryA<\/span>
\n<\/span>}<\/span><\/p>\n

<\/span>var<\/span> <\/span>numb1<\/span> = <\/span>100<\/span>
\n<\/span>var<\/span> <\/span>numb2<\/span> = <\/span>200<\/span><\/p>\n

<\/span>print<\/span>(<\/span>“<\/span>\u4ea4\u6362\u524d\u6570\u636e: <\/span>\\<\/span>(numb1) \u548c <\/span>\\<\/span>(numb2)<\/span>“<\/span>)<\/span>
\n<\/span>swapTwoInts<\/span>(<\/span>&<\/span>numb1<\/span>, &<\/span>numb2<\/span>)<\/span>
\n<\/span>print<\/span>(<\/span>“<\/span>\u4ea4\u6362\u540e\u6570\u636e: <\/span>\\<\/span>(numb1) \u548c <\/span>\\<\/span>(numb2)<\/span>“<\/span>)<\/span><\/div>\n<\/div>\n<\/div>\n

\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n

\n\u4ea4\u6362\u524d\u6570\u636e: 100 \u548c 200\n\u4ea4\u6362\u540e\u6570\u636e: 200 \u548c 100\n<\/pre>\n
\u4ee5\u4e0a\u5b9e\u4f8b\u53ea\u8bd5\u7528\u4e0e\u4ea4\u6362\u6574\u6570 Int \u7c7b\u578b\u7684\u53d8\u91cf\u3002\u5982\u679c\u4f60\u60f3\u8981\u4ea4\u6362\u4e24\u4e2a String \u503c\u6216\u8005 Double \u503c\uff0c\u5c31\u5f97\u91cd\u65b0\u5199\u4e2a\u5bf9\u5e94\u7684\u51fd\u6570\uff0c\u4f8b\u5982 swapTwoStrings(_:_:) \u548c swapTwoDoubles(_:_:)\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
\n
String \u548c Double \u503c\u4ea4\u6362\u51fd\u6570<\/h2>\n
\n
func<\/span> <\/span>swapTwoStrings<\/span>(<\/span>_<\/span> <\/span>a<\/span>: <\/span>inout<\/span> <\/span>String<\/span>, <\/span>_<\/span> <\/span>b<\/span>: <\/span>inout<\/span> <\/span>String<\/span>)<\/span> <\/span>{<\/span>
\n    <\/span>let<\/span> <\/span>temporaryA<\/span> = <\/span>a<\/span>
\n    <\/span>a<\/span> = <\/span>b<\/span>
\n    <\/span>b<\/span> = <\/span>temporaryA<\/span>
\n<\/span>}<\/span><\/p>\n
<\/span>func<\/span> <\/span>swapTwoDoubles<\/span>(<\/span>_<\/span> <\/span>a<\/span>: <\/span>inout<\/span> <\/span>Double<\/span>, <\/span>_<\/span> <\/span>b<\/span>: <\/span>inout<\/span> <\/span>Double<\/span>)<\/span> <\/span>{<\/span>
\n    <\/span>let<\/span> <\/span>temporaryA<\/span> = <\/span>a<\/span>
\n    <\/span>a<\/span> = <\/span>b<\/span>
\n    <\/span>b<\/span> = <\/span>temporaryA<\/span>
\n<\/span>}<\/span><\/div>\n<\/div>\n<\/div>\n
\u4ece\u4ee5\u4e0a\u4ee3\u7801\u6765\u770b\uff0c\u5b83\u4eec\u529f\u80fd\u4ee3\u7801\u662f\u76f8\u540c\u7684\uff0c\u53ea\u662f\u7c7b\u578b\u4e0a\u4e0d\u4e00\u6837\uff0c\u8fd9\u65f6\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6cdb\u578b\uff0c\u4ece\u800c\u907f\u514d\u91cd\u590d\u7f16\u5199\u4ee3\u7801\u3002<\/p>\n
\n\u6cdb\u578b\u4f7f\u7528\u4e86\u5360\u4f4d\u7c7b\u578b\u540d\uff08\u5728\u8fd9\u91cc\u7528\u5b57\u6bcd T \u6765\u8868\u793a\uff09\u6765\u4ee3\u66ff\u5b9e\u9645\u7c7b\u578b\u540d\uff08\u4f8b\u5982 Int\u3001String \u6216 Double\uff09\u3002<\/p>\n
\nfunc swapTwoValues<T>(_ a: inout T, _ b: inout T)\n<\/pre>\n
swapTwoValues \u540e\u9762\u8ddf\u7740\u5360\u4f4d\u7c7b\u578b\u540d\uff08T\uff09\uff0c\u5e76\u7528\u5c16\u62ec\u53f7\u62ec\u8d77\u6765\uff08<T><\/code>\uff09\u3002\u8fd9\u4e2a\u5c16\u62ec\u53f7\u544a\u8bc9 Swift \u90a3\u4e2a T \u662f swapTwoValues(_:_:) \u51fd\u6570\u5b9a\u4e49\u5185\u7684\u4e00\u4e2a\u5360\u4f4d\u7c7b\u578b\u540d\uff0c\u56e0\u6b64 Swift \u4e0d\u4f1a\u53bb\u67e5\u627e\u540d\u4e3a T \u7684\u5b9e\u9645\u7c7b\u578b\u3002<\/p>\n
\u4ee5\u4e0b\u5b9e\u4f8b\u662f\u4e00\u4e2a\u6cdb\u578b\u51fd\u6570 exchange \u7528\u6765\u4ea4\u6362\u4e24\u4e2a Int \u548c String \u503c\uff1a<\/p>\n
\n
\u5b9e\u4f8b<\/h2>\n
\n
\/\/ \u5b9a\u4e49\u4e00\u4e2a\u4ea4\u6362\u4e24\u4e2a\u53d8\u91cf\u7684\u51fd\u6570<\/span><\/span>
\n<\/span>func<\/span> <\/span>swapTwoValues<\/span><<\/span>T<\/span>><\/span>(<\/span>_<\/span> <\/span>a<\/span>: <\/span>inout<\/span> <\/span>T<\/span>, <\/span>_<\/span> <\/span>b<\/span>: <\/span>inout<\/span> <\/span>T<\/span>)<\/span> <\/span>{<\/span>
\n    <\/span>let<\/span> <\/span>temporaryA<\/span> = <\/span>a<\/span>
\n    <\/span>a<\/span> = <\/span>b<\/span>
\n    <\/span>b<\/span> = <\/span>temporaryA<\/span>
\n<\/span>}<\/span><\/p>\n
<\/span>var<\/span> <\/span>numb1<\/span> = <\/span>100<\/span>
\n<\/span>var<\/span> <\/span>numb2<\/span> = <\/span>200<\/span><\/p>\n
<\/span>print<\/span>(<\/span>“<\/span>\u4ea4\u6362\u524d\u6570\u636e:  <\/span>\\<\/span>(numb1) \u548c <\/span>\\<\/span>(numb2)<\/span>“<\/span>)<\/span>
\n<\/span>swapTwoValues<\/span>(<\/span>&<\/span>numb1<\/span>, &<\/span>numb2<\/span>)<\/span>
\n<\/span>print<\/span>(<\/span>“<\/span>\u4ea4\u6362\u540e\u6570\u636e: <\/span>\\<\/span>(numb1) \u548c <\/span>\\<\/span>(numb2)<\/span>“<\/span>)<\/span><\/p>\n
<\/span>var<\/span> <\/span>str1<\/span> = <\/span>“<\/span>A<\/span>“<\/span>
\n<\/span>var<\/span> <\/span>str2<\/span> = <\/span>“<\/span>B<\/span>“<\/span><\/p>\n
<\/span>print<\/span>(<\/span>“<\/span>\u4ea4\u6362\u524d\u6570\u636e:  <\/span>\\<\/span>(str1) \u548c <\/span>\\<\/span>(str2)<\/span>“<\/span>)<\/span>
\n<\/span>swapTwoValues<\/span>(<\/span>&<\/span>str1<\/span>, &<\/span>str2<\/span>)<\/span>
\n<\/span>print<\/span>(<\/span>“<\/span>\u4ea4\u6362\u540e\u6570\u636e: <\/span>\\<\/span>(str1) \u548c <\/span>\\<\/span>(str2)<\/span>“<\/span>)<\/span><\/div>\n<\/div>\n<\/div>\n
\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
\n\u4ea4\u6362\u524d\u6570\u636e:  100 \u548c 200\n\u4ea4\u6362\u540e\u6570\u636e: 200 \u548c 100\n\u4ea4\u6362\u524d\u6570\u636e:  A \u548c B\n\u4ea4\u6362\u540e\u6570\u636e: B \u548c A\n<\/pre>\n
\n
\u6cdb\u578b\u7c7b\u578b<\/h2>\n
Swift \u5141\u8bb8\u4f60\u5b9a\u4e49\u4f60\u81ea\u5df1\u7684\u6cdb\u578b\u7c7b\u578b\u3002<\/p>\n
\u81ea\u5b9a\u4e49\u7c7b\u3001\u7ed3\u6784\u4f53\u548c\u679a\u4e3e\u4f5c\u7528\u4e8e\u4efb\u4f55\u7c7b\u578b\uff0c\u5982\u540c Array \u548c Dictionary \u7684\u7528\u6cd5\u3002<\/p>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u6765\u7f16\u5199\u4e00\u4e2a\u540d\u4e3a Stack \uff08\u6808\uff09\u7684\u6cdb\u578b\u96c6\u5408\u7c7b\u578b\uff0c\u6808\u53ea\u5141\u8bb8\u5728\u96c6\u5408\u7684\u672b\u7aef\u6dfb\u52a0\u65b0\u7684\u5143\u7d20\uff08\u79f0\u4e4b\u4e3a\u5165\u6808\uff09\uff0c\u4e14\u4e5f\u53ea\u80fd\u4ece\u672b\u7aef\u79fb\u9664\u5143\u7d20\uff08\u79f0\u4e4b\u4e3a\u51fa\u6808\uff09\u3002<\/p>\n
<\/p>\n
\u56fe\u7247\u4e2d\u4ece\u5de6\u5230\u53f3\u89e3\u6790\u5982\u4e0b\uff1a<\/p>\n