{"id":7216,"date":"2025-06-02T13:58:54","date_gmt":"2025-06-05T06:20:53","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=7216"},"modified":"2025-06-05T13:58:54","modified_gmt":"2025-06-05T06:20:53","slug":"https-badgameshow-com-steven-281","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/https-badgameshow-com-steven-281\/","title":{"rendered":"Swift \u81ea\u5b9a\u7fa9\u5354\u8b70\u8207 Delegate \u6559\u5b78\uff1a2025 \u6700\u65b0\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

\u4ec0\u9ebc\u662f Delegate\uff1f<\/h2>\n

\u5728 Swift \u4e2d\uff0cDelegate<\/strong> \u662f\u4e00\u7a2e\u8a2d\u8a08\u6a21\u5f0f\uff0c\u5141\u8a31\u4e00\u500b\u7269\u4ef6\u8207\u53e6\u4e00\u500b\u7269\u4ef6\u9032\u884c\u901a\u4fe1\uff0c\u800c\u4e0d\u9700\u4e86\u89e3\u5c0d\u65b9\u7684\u5167\u90e8\u5be6\u4f5c\u7d30\u7bc0\u3002\u9019\u7a2e\u6a21\u5f0f\u80fd\u5920\u4f7f\u7a0b\u5f0f\u78bc\u66f4\u52a0\u6a21\u7d44\u5316\uff0c\u5f9e\u800c\u63d0\u9ad8\u53ef\u7dad\u8b77\u6027\u548c\u64f4\u5c55\u6027\u3002<\/p>\n

Delegate \u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

Delegate \u7684\u57fa\u672c\u6982\u5ff5\u662f\u901a\u904e\u5354\u8b70\uff08protocol\uff09\u4f86\u5b9a\u7fa9\u4e00\u7d44\u65b9\u6cd5\uff0c\u7136\u5f8c\u7531\u9700\u8981\u9019\u4e9b\u65b9\u6cd5\u7684\u985e\u5225\u4f86\u5be6\u4f5c\u5b83\u5011\u3002\u9019\u6a23\uff0c\u7576\u67d0\u500b\u4e8b\u4ef6\u767c\u751f\u6642\uff0c\u59d4\u6d3e\u7269\u4ef6\u5c31\u53ef\u4ee5\u901a\u77e5\u5176\u4ee3\u7406\u7269\u4ef6\uff0c\u4e0d\u5fc5\u77e5\u9053\u4ee3\u7406\u7269\u4ef6\u7684\u5177\u9ad4\u5be6\u73fe\u3002<\/p>\n

Delegate \u5be6\u4f5c\u7bc4\u4f8b<\/h2>\n

\u4ee5\u4e0b\u662f Swift \u4e2d\u5982\u4f55\u5be6\u4f5c Delegate \u7684\u57fa\u672c\u7bc4\u4f8b\uff1a<\/p>\n

protocol MyDelegate {\n    func didCompleteTask()\n}\n\nclass MyClass {\n    var delegate: MyDelegate?\n\n    func performTask() {\n        \/\/ \u6a21\u64ec\u4efb\u52d9\u5b8c\u6210\n        print(\"Task is completed.\")\n        delegate?.didCompleteTask()  \/\/ \u901a\u77e5 delegate\n    }\n}\n\nclass MyDelegateClass: MyDelegate {\n    func didCompleteTask() {\n        print(\"Delegate notified: Task completed.\")\n    }\n}\n\n\/\/ \u4f7f\u7528\u7bc4\u4f8b\nlet myClassInstance = MyClass()\nlet delegateInstance = MyDelegateClass()\n\nmyClassInstance.delegate = delegateInstance\nmyClassInstance.performTask()\n<\/code><\/pre>\n
\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u5354\u8b70 MyDelegate<\/code>\uff0c\u4e26\u5728 MyClass<\/code> \u4e2d\u4f7f\u7528\u9019\u500b\u5354\u8b70\u3002\u7576\u4efb\u52d9\u5b8c\u6210\u6642\uff0cMyClass<\/code> \u6703\u901a\u77e5\u5176\u4ee3\u7406\u7269\u4ef6\uff0c\u5f9e\u800c\u9054\u5230\u901a\u4fe1\u7684\u76ee\u7684\u3002<\/p>\n
\u932f\u8aa4\u6392\u9664<\/h2>\n
\u5728\u4f7f\u7528 Delegate \u6a21\u5f0f\u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4ee5\u4e0b\u5e38\u898b\u932f\u8aa4\uff1a<\/p>\n
    \n
  • \u4ee3\u7406\u672a\u8a2d\u7f6e\uff1a<\/strong>\u78ba\u4fdd\u5728\u4f7f\u7528\u4ee3\u7406\u65b9\u6cd5\u4e4b\u524d\uff0c\u5df2\u7d93\u6b63\u78ba\u8a2d\u7f6e\u4e86\u4ee3\u7406\u7269\u4ef6\u3002<\/li>\n
  • \u5354\u8b70\u672a\u5be6\u4f5c\uff1a<\/strong>\u6aa2\u67e5\u4ee3\u7406\u985e\u5225\u662f\u5426\u5df2\u5be6\u4f5c\u6240\u6709\u5354\u8b70\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n
    \u5ef6\u4f38\u61c9\u7528<\/h2>\n
    Delegate \u6a21\u5f0f\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\u90fd\u53ef\u4ee5\u61c9\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n
      \n
    • \u5728 UITableView \u548c UICollectionView \u4e2d\u9032\u884c\u884c\u70ba\u8655\u7406\u3002<\/li>\n
    • \u5728\u81ea\u5b9a\u7fa9\u8996\u5716\u4e2d\u8655\u7406\u7528\u6236\u4ea4\u4e92\u3002<\/li>\n
    • \u5728\u7db2\u8def\u8acb\u6c42\u5b8c\u6210\u5f8c\u901a\u77e5\u8996\u5716\u66f4\u65b0\u3002<\/li>\n<\/ul>\n
      \"Swift<\/p>\n
      Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n
      Q1: Delegate \u8207 Closure \u6709\u4ec0\u9ebc\u5340\u5225\uff1f<\/h3>\n
      Delegate \u901a\u5e38\u7528\u65bc\u4e00\u5c0d\u591a\u7684\u60c5\u6cc1\uff0c\u800c Closure \u66f4\u9069\u5408\u4e00\u5c0d\u4e00\u7684\u7c21\u55ae\u56de\u8abf\u3002Delegate \u53ef\u4ee5\u5b9a\u7fa9\u591a\u500b\u65b9\u6cd5\uff0c\u800c Closure \u5247\u662f\u4e00\u6b21\u6027\u7684\u56de\u8abf\u3002<\/p>\n
      Q2: \u5982\u4f55\u907f\u514d Delegate \u7522\u751f\u7684\u5faa\u74b0\u5f15\u7528\uff1f<\/h3>\n
      \u5728\u4f7f\u7528 Delegate \u6642\uff0c\u901a\u5e38\u6703\u4f7f\u7528 weak<\/code> \u4fee\u98fe\u7b26\u4f86\u907f\u514d\u5faa\u74b0\u5f15\u7528\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u4ee3\u7406\u7269\u4ef6\u4e0d\u6703\u88ab\u6301\u6709\uff0c\u5f9e\u800c\u907f\u514d\u8a18\u61b6\u9ad4\u6cc4\u6f0f\u3002<\/p>\n
      Q3: \u5728\u4ec0\u9ebc\u60c5\u6cc1\u4e0b\u61c9\u8a72\u4f7f\u7528 Delegate\uff1f<\/h3>\n
      \u7576\u4f60\u9700\u8981\u5728\u5169\u500b\u7269\u4ef6\u4e4b\u9593\u9032\u884c\u901a\u4fe1\uff0c\u800c\u4e0d\u60f3\u8b93\u5176\u4e2d\u4e00\u500b\u7269\u4ef6\u77e5\u9053\u53e6\u4e00\u500b\u7269\u4ef6\u7684\u5177\u9ad4\u5be6\u73fe\u6642\uff0c\u61c9\u8a72\u4f7f\u7528 Delegate \u6a21\u5f0f\u3002\u9019\u6709\u52a9\u65bc\u4fdd\u6301\u7a0b\u5f0f\u78bc\u7684\u6a21\u7d44\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n
      —<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39Swift\u4e2d\u81ea\u5b9a\u7fa9\u5354\u8b70\uff1aDelegate\uff0c\u8a73\u7d30\u89e3\u91cbDelegate\u7684\u6982\u5ff5\u3001\u529f\u80fd\u53ca\u4f7f\u7528\u65b9\u6cd5\uff0c\u8b93\u8b80\u8005\u80fd\u5920\u66f4\u52a0\u4e86\u89e3Swift\u4e2d\u7684Delegate\u529f\u80fd\uff0c\u4e26\u80fd\u5920\u66f4\u6709\u6548\u7387\u7684\u4f7f\u7528Delegate\u3002<\/p>\n","protected":false},"author":1,"featured_media":7215,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[174,5],"tags":[173,9],"class_list":["post-7216","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ios","category-swift","tag-ios","tag-swift"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2023\/02\/Swift-\u81ea\u5b9a\u7fa9\u5354\u8b70\uff1aDelegate\ud83c\udfaf_1675405150.978258.webp","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1So","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/7216","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=7216"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/7216\/revisions"}],"predecessor-version":[{"id":13114,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/7216\/revisions\/13114"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/7215"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=7216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=7216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=7216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}