{"id":534,"date":"2018-02-23T23:39:03","date_gmt":"2018-02-23T15:39:03","guid":{"rendered":"http:\/\/60.205.208.74\/2018\/02\/23\/swift-%e9%97%ad%e5%8c%85\/"},"modified":"2018-02-23T23:39:03","modified_gmt":"2018-02-23T15:39:03","slug":"swift-%e9%97%ad%e5%8c%85","status":"publish","type":"post","link":"https:\/\/www.puzi7.net\/?p=534","title":{"rendered":"Swift \u95ed\u5305"},"content":{"rendered":"
\n
\n

Swift \u95ed\u5305<\/h1>\n

\u95ed\u5305(Closures)\u662f\u81ea\u5305\u542b\u7684\u529f\u80fd\u4ee3\u7801\u5757\uff0c\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u4f7f\u7528\u6216\u8005\u7528\u6765\u4f5c\u4e3a\u53c2\u6570\u4f20\u503c\u3002<\/p>\n

Swift \u4e2d\u7684\u95ed\u5305\u4e0e C \u548c Objective-C \u4e2d\u7684\u4ee3\u7801\u5757\uff08blocks\uff09\u4ee5\u53ca\u5176\u4ed6\u4e00\u4e9b\u7f16\u7a0b\u8bed\u8a00\u4e2d\u7684 \u533f\u540d\u51fd\u6570\u6bd4\u8f83\u76f8\u4f3c\u3002<\/p>\n

\u5168\u5c40\u51fd\u6570\u548c\u5d4c\u5957\u51fd\u6570\u5176\u5b9e\u5c31\u662f\u7279\u6b8a\u7684\u95ed\u5305\u3002 <\/p>\n

\u95ed\u5305\u7684\u5f62\u5f0f\u6709\uff1a<\/p>\n\n\n\n\n
\u5168\u5c40\u51fd\u6570<\/td>\n\u5d4c\u5957\u51fd\u6570<\/td>\n\u95ed\u5305\u8868\u8fbe\u5f0f<\/td>\n<\/tr>\n
\u6709\u540d\u5b57\u4f46\u4e0d\u80fd\u6355\u83b7\u4efb\u4f55\u503c\u3002 <\/td>\n\u6709\u540d\u5b57\uff0c\u4e5f\u80fd\u6355\u83b7\u5c01\u95ed\u51fd\u6570\u5185\u7684\u503c\u3002 <\/td>\n\u65e0\u540d\u95ed\u5305\uff0c\u4f7f\u7528\u8f7b\u91cf\u7ea7\u8bed\u6cd5\uff0c\u53ef\u4ee5\u6839\u636e\u4e0a\u4e0b\u6587\u73af\u5883\u6355\u83b7\u503c\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Swift\u4e2d\u7684\u95ed\u5305\u6709\u5f88\u591a\u4f18\u5316\u7684\u5730\u65b9: <\/p>\n

    \n
  1. \n\u6839\u636e\u4e0a\u4e0b\u6587\u63a8\u65ad\u53c2\u6570\u548c\u8fd4\u56de\u503c\u7c7b\u578b<\/li>\n
  2. \n\u4ece\u5355\u884c\u8868\u8fbe\u5f0f\u95ed\u5305\u4e2d\u9690\u5f0f\u8fd4\u56de\uff08\u4e5f\u5c31\u662f\u95ed\u5305\u4f53\u53ea\u6709\u4e00\u884c\u4ee3\u7801\uff0c\u53ef\u4ee5\u7701\u7565return\uff09<\/li>\n
  3. \n\u53ef\u4ee5\u4f7f\u7528\u7b80\u5316\u53c2\u6570\u540d\uff0c\u5982$0, $1(\u4ece0\u5f00\u59cb\uff0c\u8868\u793a\u7b2ci\u4e2a\u53c2\u6570…)<\/li>\n
  4. \n\u63d0\u4f9b\u4e86\u5c3e\u968f\u95ed\u5305\u8bed\u6cd5(Trailing closure syntax)<\/li>\n

    \u8bed\u6cd5<\/h3>\n

    \n\u4ee5\u4e0b\u5b9a\u4e49\u4e86\u4e00\u4e2a\u63a5\u6536\u53c2\u6570\u5e76\u8fd4\u56de\u6307\u5b9a\u7c7b\u578b\u7684\u95ed\u5305\u8bed\u6cd5\uff1a<\/p>\n

    \n{(parameters) -> return type in\n   statements\n}\n<\/pre>\n
    \u5b9e\u4f8b<\/h3>\n
    \nimport Cocoa\n\nlet studname = { print(\"Swift \u95ed\u5305\u5b9e\u4f8b\u3002\") }\nstudname()\n<\/pre>\n
    \u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
    \nSwift \u95ed\u5305\u5b9e\u4f8b\u3002\n<\/pre>\n
    \u4ee5\u4e0b\u95ed\u5305\u5f62\u5f0f\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\u5e76\u8fd4\u56de\u5e03\u5c14\u503c\uff1a<\/p>\n
    \n{(Int, Int) -> Bool in\n   Statement1\n   Statement 2\n    ---\n   Statement n\n}\n<\/pre>\n
    \u5b9e\u4f8b<\/h3>\n
    \nimport Cocoa\n\nlet divide = {(val1: Int, val2: Int) -> Int in \n   return val1 \/ val2 \n}\nlet result = divide(200, 20)\nprint (result)\n<\/pre>\n
    \u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
    \n10\n<\/pre>\n
    \n
    \u95ed\u5305\u8868\u8fbe\u5f0f<\/h2>\n
    \u95ed\u5305\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5229\u7528\u7b80\u6d01\u8bed\u6cd5\u6784\u5efa\u5185\u8054\u95ed\u5305\u7684\u65b9\u5f0f\u3002 \u95ed\u5305\u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u4e00\u4e9b\u8bed\u6cd5\u4f18\u5316\uff0c\u4f7f\u5f97\u64b0\u5199\u95ed\u5305\u53d8\u5f97\u7b80\u5355\u660e\u4e86\u3002\n<\/p>\n
    \n
    sorted \u65b9\u6cd5<\/h3>\n
    Swift \u6807\u51c6\u5e93\u63d0\u4f9b\u4e86\u540d\u4e3a sorted(by:)<\/strong> \u7684\u65b9\u6cd5\uff0c\u4f1a\u6839\u636e\u60a8\u63d0\u4f9b\u7684\u7528\u4e8e\u6392\u5e8f\u7684\u95ed\u5305\u51fd\u6570\u5c06\u5df2\u77e5\u7c7b\u578b\u6570\u7ec4\u4e2d\u7684\u503c\u8fdb\u884c\u6392\u5e8f\u3002 <\/p>\n
    \u6392\u5e8f\u5b8c\u6210\u540e\uff0csorted(by:) \u65b9\u6cd5\u4f1a\u8fd4\u56de\u4e00\u4e2a\u4e0e\u539f\u6570\u7ec4\u5927\u5c0f\u76f8\u540c\uff0c\u5305\u542b\u540c\u7c7b\u578b\u5143\u7d20\u4e14\u5143\u7d20\u5df2\u6b63\u786e\u6392\u5e8f\u7684\u65b0\u6570\u7ec4\u3002\u539f\u6570\u7ec4\u4e0d\u4f1a\u88ab sorted(by:) \u65b9\u6cd5\u4fee\u6539\u3002\n<\/p>\n
    sorted(by:)\u65b9\u6cd5\u9700\u8981\u4f20\u5165\u4e24\u4e2a\u53c2\u6570\uff1a<\/p>\n<\/ol>\n
      \n
    • \u5df2\u77e5\u7c7b\u578b\u7684\u6570\u7ec4<\/li>\n
    • \u95ed\u5305\u51fd\u6570\uff0c\u8be5\u95ed\u5305\u51fd\u6570\u9700\u8981\u4f20\u5165\u4e0e\u6570\u7ec4\u5143\u7d20\u7c7b\u578b\u76f8\u540c\u7684\u4e24\u4e2a\u503c\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u7c7b\u578b\u503c\u6765\u8868\u660e\u5f53\u6392\u5e8f\u7ed3\u675f\u540e\u4f20\u5165\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u6392\u5728\u7b2c\u4e8c\u4e2a\u53c2\u6570\u524d\u9762\u8fd8\u662f\u540e\u9762\u3002\u5982\u679c\u7b2c\u4e00\u4e2a\u53c2\u6570\u503c\u51fa\u73b0\u5728\u7b2c\u4e8c\u4e2a\u53c2\u6570\u503c\u524d\u9762\uff0c\u6392\u5e8f\u95ed\u5305\u51fd\u6570\u9700\u8981\u8fd4\u56de true<\/b>\uff0c\u53cd\u4e4b\u8fd4\u56de false<\/b>\u3002<\/li>\n<\/ul>\n
      \u5b9e\u4f8b<\/h3>\n
      \nimport Cocoa\n\nlet names = [\"AT\", \"AE\", \"D\", \"S\", \"BE\"]\n\n\/\/ \u4f7f\u7528\u666e\u901a\u51fd\u6570(\u6216\u5185\u5d4c\u51fd\u6570)\u63d0\u4f9b\u6392\u5e8f\u529f\u80fd,\u95ed\u5305\u51fd\u6570\u7c7b\u578b\u9700\u4e3a(String, String) -> Bool\u3002\nfunc backwards(s1: String, s2: String) -> Bool {\n    return s1 > s2\n}\nvar reversed = names.sorted(by: backwards)\n\nprint(reversed)\n<\/pre>\n
      \u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
      \n[\"S\", \"D\", \"BE\", \"AT\", \"AE\"]\n<\/pre>\n
      \n\u5982\u679c\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e32 (s1) \u5927\u4e8e\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u4e32 (s2)\uff0cbackwards\u51fd\u6570\u8fd4\u56detrue\uff0c\u8868\u793a\u5728\u65b0\u7684\u6570\u7ec4\u4e2ds1\u5e94\u8be5\u51fa\u73b0\u5728s2\u524d\u3002 \u5bf9\u4e8e\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u6765\u8bf4\uff0c”\u5927\u4e8e” \u8868\u793a “\u6309\u7167\u5b57\u6bcd\u987a\u5e8f\u8f83\u665a\u51fa\u73b0”\u3002 \u8fd9\u610f\u5473\u7740\u5b57\u6bcd”B”\u5927\u4e8e\u5b57\u6bcd”A”\uff0c\u5b57\u7b26\u4e32”S”\u5927\u4e8e\u5b57\u7b26\u4e32”D”\u3002 \u5176\u5c06\u8fdb\u884c\u5b57\u6bcd\u9006\u5e8f\u6392\u5e8f\uff0c”AT”\u5c06\u4f1a\u6392\u5728”AE”\u4e4b\u524d\u3002\n<\/p>\n
      \n
      \u53c2\u6570\u540d\u79f0\u7f29\u5199<\/h2>\n
      Swift \u81ea\u52a8\u4e3a\u5185\u8054\u51fd\u6570\u63d0\u4f9b\u4e86\u53c2\u6570\u540d\u79f0\u7f29\u5199\u529f\u80fd\uff0c\u60a8\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7$0,$1,$2\u6765\u987a\u5e8f\u8c03\u7528\u95ed\u5305\u7684\u53c2\u6570\u3002<\/p>\n
      \u5b9e\u4f8b<\/h3>\n
      \nimport Cocoa\n\nlet names = [\"AT\", \"AE\", \"D\", \"S\", \"BE\"]\n\nvar reversed = names.sorted( by: { $0 > $1 } )\nprint(reversed)\n<\/pre>\n
      $0\u548c$1\u8868\u793a\u95ed\u5305\u4e2d\u7b2c\u4e00\u4e2a\u548c\u7b2c\u4e8c\u4e2aString\u7c7b\u578b\u7684\u53c2\u6570\u3002<\/p>\n
      \u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
      \n[\"S\", \"D\", \"BE\", \"AT\", \"AE\"]\n<\/pre>\n
      \u5982\u679c\u4f60\u5728\u95ed\u5305\u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u53c2\u6570\u540d\u79f0\u7f29\u5199, \u60a8\u53ef\u4ee5\u5728\u95ed\u5305\u53c2\u6570\u5217\u8868\u4e2d\u7701\u7565\u5bf9\u5176\u5b9a\u4e49, \u5e76\u4e14\u5bf9\u5e94\u53c2\u6570\u540d\u79f0\u7f29\u5199\u7684\u7c7b\u578b\u4f1a\u901a\u8fc7\u51fd\u6570\u7c7b\u578b\u8fdb\u884c\u63a8\u65ad\u3002in \u5173\u952e\u5b57\u540c\u6837\u4e5f\u53ef\u4ee5\u88ab\u7701\u7565.<\/p>\n
      \n
      \u8fd0\u7b97\u7b26\u51fd\u6570<\/h2>\n
      \u5b9e\u9645\u4e0a\u8fd8\u6709\u4e00\u79cd\u66f4\u7b80\u77ed\u7684\u65b9\u5f0f\u6765\u64b0\u5199\u4e0a\u9762\u4f8b\u5b50\u4e2d\u7684\u95ed\u5305\u8868\u8fbe\u5f0f\u3002<\/p>\n
      \nSwift \u7684String<\/code>\u7c7b\u578b\u5b9a\u4e49\u4e86\u5173\u4e8e\u5927\u4e8e\u53f7 (><\/code>) \u7684\u5b57\u7b26\u4e32\u5b9e\u73b0\uff0c\u5176\u4f5c\u4e3a\u4e00\u4e2a\u51fd\u6570\u63a5\u53d7\u4e24\u4e2aString<\/code>\u7c7b\u578b\u7684\u53c2\u6570\u5e76\u8fd4\u56deBool<\/code>\u7c7b\u578b\u7684\u503c\u3002
      \n\u800c\u8fd9\u6b63\u597d\u4e0esort(_:)<\/code>\u65b9\u6cd5\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u9700\u8981\u7684\u51fd\u6570\u7c7b\u578b\u76f8\u7b26\u5408\u3002
      \n\u56e0\u6b64\uff0c\u60a8\u53ef\u4ee5\u7b80\u5355\u5730\u4f20\u9012\u4e00\u4e2a\u5927\u4e8e\u53f7\uff0cSwift\u53ef\u4ee5\u81ea\u52a8\u63a8\u65ad\u51fa\u60a8\u60f3\u4f7f\u7528\u5927\u4e8e\u53f7\u7684\u5b57\u7b26\u4e32\u51fd\u6570\u5b9e\u73b0\uff1a<\/p>\n
      \nimport Cocoa\n\nlet names = [\"AT\", \"AE\", \"D\", \"S\", \"BE\"]\n\nvar reversed = names.sorted(by: >)\nprint(reversed)\n<\/pre>\n
      \u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
      \n[\"S\", \"D\", \"BE\", \"AT\", \"AE\"]\n<\/pre>\n
      \n
      \u5c3e\u968f\u95ed\u5305<\/h2>\n
      \u5c3e\u968f\u95ed\u5305\u662f\u4e00\u4e2a\u4e66\u5199\u5728\u51fd\u6570\u62ec\u53f7\u4e4b\u540e\u7684\u95ed\u5305\u8868\u8fbe\u5f0f\uff0c\u51fd\u6570\u652f\u6301\u5c06\u5176\u4f5c\u4e3a\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u8c03\u7528\u3002<\/p>\n
      \nfunc someFunctionThatTakesAClosure(closure: () -> Void) {\n    \/\/ \u51fd\u6570\u4f53\u90e8\u5206\n}\n\n\/\/ \u4ee5\u4e0b\u662f\u4e0d\u4f7f\u7528\u5c3e\u968f\u95ed\u5305\u8fdb\u884c\u51fd\u6570\u8c03\u7528\nsomeFunctionThatTakesAClosure({\n    \/\/ \u95ed\u5305\u4e3b\u4f53\u90e8\u5206\n})\n\n\/\/ \u4ee5\u4e0b\u662f\u4f7f\u7528\u5c3e\u968f\u95ed\u5305\u8fdb\u884c\u51fd\u6570\u8c03\u7528\nsomeFunctionThatTakesAClosure() {\n  \/\/ \u95ed\u5305\u4e3b\u4f53\u90e8\u5206\n}\n<\/pre>\n
      \u5b9e\u4f8b<\/h3>\n
      \nimport Cocoa\n\nlet names = [\"AT\", \"AE\", \"D\", \"S\", \"BE\"]\n\n\/\/\u5c3e\u968f\u95ed\u5305\nvar reversed = names.sorted() { $0 > $1 }\nprint(reversed)\n<\/pre>\n
      sort() \u540e\u7684 { $0 > $1} \u4e3a\u5c3e\u968f\u95ed\u5305\u3002<\/p>\n
      \u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
      \n[\"S\", \"D\", \"BE\", \"AT\", \"AE\"]\n<\/pre>\n
      \n
      \u6ce8\u610f\uff1a
      \n\u5982\u679c\u51fd\u6570\u53ea\u9700\u8981\u95ed\u5305\u8868\u8fbe\u5f0f\u4e00\u4e2a\u53c2\u6570\uff0c\u5f53\u60a8\u4f7f\u7528\u5c3e\u968f\u95ed\u5305\u65f6\uff0c\u60a8\u751a\u81f3\u53ef\u4ee5\u628a()<\/code>\u7701\u7565\u6389\u3002<\/p>\n
      \nreversed = names.sorted { $0 > $1 }\n<\/pre>\n<\/blockquote>\n
      \n
      \u6355\u83b7\u503c<\/h2>\n
      \u95ed\u5305\u53ef\u4ee5\u5728\u5176\u5b9a\u4e49\u7684\u4e0a\u4e0b\u6587\u4e2d\u6355\u83b7\u5e38\u91cf\u6216\u53d8\u91cf\u3002<\/p>\n
       \u5373\u4f7f\u5b9a\u4e49\u8fd9\u4e9b\u5e38\u91cf\u548c\u53d8\u91cf\u7684\u539f\u57df\u5df2\u7ecf\u4e0d\u5b58\u5728\uff0c\u95ed\u5305\u4ecd\u7136\u53ef\u4ee5\u5728\u95ed\u5305\u51fd\u6570\u4f53\u5185\u5f15\u7528\u548c\u4fee\u6539\u8fd9\u4e9b\u503c\u3002<\/p>\n
      Swift\u6700\u7b80\u5355\u7684\u95ed\u5305\u5f62\u5f0f\u662f\u5d4c\u5957\u51fd\u6570\uff0c\u4e5f\u5c31\u662f\u5b9a\u4e49\u5728\u5176\u4ed6\u51fd\u6570\u7684\u51fd\u6570\u4f53\u5185\u7684\u51fd\u6570\u3002 <\/p>\n
      \u5d4c\u5957\u51fd\u6570\u53ef\u4ee5\u6355\u83b7\u5176\u5916\u90e8\u51fd\u6570\u6240\u6709\u7684\u53c2\u6570\u4ee5\u53ca\u5b9a\u4e49\u7684\u5e38\u91cf\u548c\u53d8\u91cf\u3002<\/p>\n
      \u770b\u8fd9\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
      \nfunc makeIncrementor(forIncrement amount: Int) -> () -> Int {\n    var runningTotal = 0\n    func incrementor() -> Int {\n        runningTotal += amount\n        return runningTotal\n    }\n    return incrementor\n}\n<\/pre>\n
      \u4e00\u4e2a\u51fd\u6570makeIncrementor \uff0c\u5b83\u6709\u4e00\u4e2aInt\u578b\u7684\u53c2\u6570amout, \u5e76\u4e14\u5b83\u6709\u4e00\u4e2a\u5916\u90e8\u53c2\u6570\u540d\u5b57forIncremet\uff0c\u610f\u5473\u7740\u4f60\u8c03\u7528\u7684\u65f6\u5019\uff0c\u5fc5\u987b\u4f7f\u7528\u8fd9\u4e2a\u5916\u90e8\u540d\u5b57\u3002\u8fd4\u56de\u503c\u662f\u4e00\u4e2a()-> Int<\/code>\u7684\u51fd\u6570\u3002<\/p>\n
      \u51fd\u6570\u9898\u5185\uff0c\u58f0\u660e\u4e86\u53d8\u91cfrunningTotal \u548c\u4e00\u4e2a\u51fd\u6570incrementor\u3002<\/p>\n
      incrementor\u51fd\u6570\u5e76\u6ca1\u6709\u83b7\u53d6\u4efb\u4f55\u53c2\u6570\uff0c\u4f46\u662f\u5728\u51fd\u6570\u4f53\u5185\u8bbf\u95ee\u4e86runningTotal\u548camount\u53d8\u91cf\u3002\u8fd9\u662f\u56e0\u4e3a\u5176\u901a\u8fc7\u6355\u83b7\u5728\u5305\u542b\u5b83\u7684\u51fd\u6570\u4f53\u5185\u5df2\u7ecf\u5b58\u5728\u7684runningTotal\u548camount\u53d8\u91cf\u800c\u5b9e\u73b0\u3002<\/p>\n
      \u7531\u4e8e\u6ca1\u6709\u4fee\u6539amount\u53d8\u91cf\uff0cincrementor\u5b9e\u9645\u4e0a\u6355\u83b7\u5e76\u5b58\u50a8\u4e86\u8be5\u53d8\u91cf\u7684\u4e00\u4e2a\u526f\u672c\uff0c\u800c\u8be5\u526f\u672c\u968f\u7740incrementor\u4e00\u540c\u88ab\u5b58\u50a8\u3002<\/p>\n
      \u6240\u4ee5\u6211\u4eec\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u65f6\u4f1a\u7d2f\u52a0\uff1a<\/p>\n
      \nimport Cocoa\n\nfunc makeIncrementor(forIncrement amount: Int) -> () -> Int {\n    var runningTotal = 0\n    func incrementor() -> Int {\n        runningTotal += amount\n        return runningTotal\n    }\n    return incrementor\n}\n\nlet incrementByTen = makeIncrementor(forIncrement: 10)\n\n\/\/ \u8fd4\u56de\u7684\u503c\u4e3a10\nprint(incrementByTen())\n\n\/\/ \u8fd4\u56de\u7684\u503c\u4e3a20\nprint(incrementByTen())\n\n\/\/ \u8fd4\u56de\u7684\u503c\u4e3a30\nprint(incrementByTen())\n<\/pre>\n
      \u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
      \n10\n20\n30\n<\/pre>\n
      \n
      \u95ed\u5305\u662f\u5f15\u7528\u7c7b\u578b<\/h2>\n
      \u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cincrementByTen\u662f\u5e38\u91cf\uff0c\u4f46\u662f\u8fd9\u4e9b\u5e38\u91cf\u6307\u5411\u7684\u95ed\u5305\u4ecd\u7136\u53ef\u4ee5\u589e\u52a0\u5176\u6355\u83b7\u7684\u53d8\u91cf\u503c\u3002<\/p>\n
      \u8fd9\u662f\u56e0\u4e3a\u51fd\u6570\u548c\u95ed\u5305\u90fd\u662f\u5f15\u7528\u7c7b\u578b\u3002<\/p>\n
      \u65e0\u8bba\u60a8\u5c06\u51fd\u6570\/\u95ed\u5305\u8d4b\u503c\u7ed9\u4e00\u4e2a\u5e38\u91cf\u8fd8\u662f\u53d8\u91cf\uff0c\u60a8\u5b9e\u9645\u4e0a\u90fd\u662f\u5c06\u5e38\u91cf\/\u53d8\u91cf\u7684\u503c\u8bbe\u7f6e\u4e3a\u5bf9\u5e94\u51fd\u6570\/\u95ed\u5305\u7684\u5f15\u7528\u3002 \u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0cincrementByTen\u6307\u5411\u95ed\u5305\u7684\u5f15\u7528\u662f\u4e00\u4e2a\u5e38\u91cf\uff0c\u800c\u5e76\u975e\u95ed\u5305\u5185\u5bb9\u672c\u8eab\u3002<\/p>\n
      \u8fd9\u4e5f\u610f\u5473\u7740\u5982\u679c\u60a8\u5c06\u95ed\u5305\u8d4b\u503c\u7ed9\u4e86\u4e24\u4e2a\u4e0d\u540c\u7684\u5e38\u91cf\/\u53d8\u91cf\uff0c\u4e24\u4e2a\u503c\u90fd\u4f1a\u6307\u5411\u540c\u4e00\u4e2a\u95ed\u5305\uff1a<\/p>\n
      \nimport Cocoa\n\nfunc makeIncrementor(forIncrement amount: Int) -> () -> Int {\n    var runningTotal = 0\n    func incrementor() -> Int {\n        runningTotal += amount\n        return runningTotal\n    }\n    return incrementor\n}\n\nlet incrementByTen = makeIncrementor(forIncrement: 10)\n\n\/\/ \u8fd4\u56de\u7684\u503c\u4e3a10\nincrementByTen()\n\n\/\/ \u8fd4\u56de\u7684\u503c\u4e3a20\nincrementByTen()\n\n\/\/ \u8fd4\u56de\u7684\u503c\u4e3a30\nincrementByTen()\n\n\/\/ \u8fd4\u56de\u7684\u503c\u4e3a40\nincrementByTen()\n\nlet alsoIncrementByTen = incrementByTen\n\n\/\/ \u8fd4\u56de\u7684\u503c\u4e5f\u4e3a50\nprint(alsoIncrementByTen())\n<\/pre>\n
      \u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<\/p>\n
      50<\/pre>\n<\/p><\/div>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"
      Swift \u95ed\u5305 \u95ed\u5305(Closures)\u662f\u81ea\u5305\u542b\u7684\u529f\u80fd\u4ee3\u7801\u5757\uff0c\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u4f7f\u7528\u6216\u8005\u7528\u6765\u4f5c…<\/span><\/p>\n
      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-534","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\/534","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=534"}],"version-history":[{"count":0,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=\/wp\/v2\/posts\/534\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.puzi7.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}