{"id":4257,"date":"2025-05-30T12:29:36","date_gmt":"2025-06-05T04:31:35","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4257"},"modified":"2025-06-05T12:29:36","modified_gmt":"2025-06-05T04:31:35","slug":"%e5%ad%b8%e7%bf%92swift%e4%b8%ad%e7%9a%84override%e9%97%9c%e9%8d%b5%e5%ad%97-2","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e5%ad%b8%e7%bf%92swift%e4%b8%ad%e7%9a%84override%e9%97%9c%e9%8d%b5%e5%ad%97-2\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Swift \u4e2d\u7684 Overriding \u95dc\u9375\u5b57\uff1a2025 \u6700\u65b0\u6559\u5b78\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

Swift \u4e2d Overriding \u95dc\u9375\u5b57\u7684\u4f7f\u7528\u65b9\u6cd5<\/h1>\n

Swift \u662f\u4e00\u7a2e\u73fe\u4ee3\u5316\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u4ee5\u5176\u7c21\u6f54\u7684\u8a9e\u6cd5\u548c\u5f37\u5927\u7684\u529f\u80fd\u800c\u805e\u540d\u3002\u5728 Swift \u4e2d\uff0cOverriding<\/strong> \u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5141\u8a31\u958b\u767c\u8005\u5728\u5b50\u985e\u5225\u4e2d\u91cd\u65b0\u5b9a\u7fa9\u7236\u985e\u5225\u7684\u65b9\u6cd5\u3002\u9019\u7a2e\u80fd\u529b\u4f7f\u5f97\u7e7c\u627f\u548c\u591a\u578b\u6027\u6210\u70ba\u53ef\u80fd\uff0c\u4e26\u4f7f\u5f97\u7a0b\u5f0f\u78bc\u66f4\u52a0\u9748\u6d3b\u548c\u53ef\u64f4\u5c55\u3002<\/p>\n

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

\u5728 Swift \u4e2d\uff0c\u7576\u4e00\u500b\u5b50\u985e\u5225\u9700\u8981\u4fee\u6539\u7236\u985e\u5225\u7684\u67d0\u500b\u65b9\u6cd5\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 override<\/strong> \u95dc\u9375\u5b57\u4f86\u8868\u660e\u9019\u4e00\u9ede\u3002\u9019\u6a23\u505a\u7684\u597d\u8655\u5728\u65bc\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u81ea\u5b9a\u7fa9\u884c\u70ba\uff0c\u800c\u4e0d\u5fc5\u76f4\u63a5\u4fee\u6539\u7236\u985e\u5225\u7684\u5be6\u73fe\u3002<\/p>\n

Overriding \u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n

\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u7236\u985e\u5225 Animal<\/strong>\uff0c\u5176\u6709\u4e00\u500b\u540d\u70ba eat()<\/strong> \u7684\u65b9\u6cd5\uff0c\u800c\u6211\u5011\u60f3\u5728\u5b50\u985e\u5225 Dog<\/strong> \u4e2d\u91cd\u65b0\u5b9a\u7fa9\u9019\u500b\u65b9\u6cd5\uff0c\u5247\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n

\nclass Animal {\n    func eat() {\n        print(\"Animal is eating\")\n    }\n}\n\nclass Dog: Animal {\n    override func eat() {\n        print(\"Dog is eating\")\n    }\n}\n<\/pre>\n
\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5728 Dog<\/strong> \u985e\u5225\u4e2d\u4f7f\u7528\u4e86 override<\/strong> \u95dc\u9375\u5b57\u4f86\u91cd\u65b0\u5b9a\u7fa9 eat()<\/strong> \u65b9\u6cd5\uff0c\u9019\u6a23\u7576\u6211\u5011\u8abf\u7528 Dog<\/strong> \u7684 eat()<\/strong> \u65b9\u6cd5\u6642\uff0c\u6703\u8f38\u51fa “Dog is eating”\u3002<\/p>\n
Overriding \u7684\u512a\u9ede<\/h2>\n
\u4f7f\u7528 Overriding \u53ef\u4ee5\u4f7f\u5f97\u7a0b\u5f0f\u78bc\u66f4\u52a0\u53ef\u8b80\u548c\u53ef\u7dad\u8b77\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4e3b\u8981\u512a\u9ede\uff1a<\/p>\n
    \n
  • \u64f4\u5c55\u6027\uff1a<\/strong>\u80fd\u5920\u6839\u64da\u9700\u6c42\u64f4\u5c55\u7236\u985e\u5225\u7684\u529f\u80fd\u3002<\/li>\n
  • \u4ee3\u78bc\u91cd\u7528\uff1a<\/strong>\u5229\u7528\u73fe\u6709\u7684\u7236\u985e\u5225\u65b9\u6cd5\uff0c\u6e1b\u5c11\u91cd\u8907\u4ee3\u78bc\u3002<\/li>\n
  • \u63d0\u9ad8\u53ef\u7dad\u8b77\u6027\uff1a<\/strong>\u66f4\u6613\u65bc\u66f4\u65b0\u548c\u8abf\u6574\u7a0b\u5f0f\u78bc\u3002<\/li>\n<\/ul>\n
    \u932f\u8aa4\u6392\u9664<\/h2>\n
    \u5728\u4f7f\u7528 Overriding \u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u7684\u932f\u8aa4\uff1a<\/p>\n
      \n
    • \u4e0d\u5c0f\u5fc3\u7701\u7565 override<\/strong> \u95dc\u9375\u5b57\uff0c\u9019\u6703\u5c0e\u81f4\u7de8\u8b6f\u932f\u8aa4\u3002<\/li>\n
    • \u65b9\u6cd5\u7684\u53c3\u6578\u6216\u8fd4\u56de\u985e\u578b\u8207\u7236\u985e\u5225\u4e0d\u5339\u914d\uff0c\u9019\u4e5f\u6703\u5c0e\u81f4\u7de8\u8b6f\u932f\u8aa4\u3002<\/li>\n<\/ul>\n
      \u5ef6\u4f38\u61c9\u7528<\/h2>\n
      Overriding \u4e0d\u50c5\u9650\u65bc\u65b9\u6cd5\uff0c\u4e5f\u53ef\u4ee5\u7528\u65bc\u5c6c\u6027\u3002\u5728 Swift \u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 override<\/strong> \u95dc\u9375\u5b57\u4f86\u91cd\u65b0\u5b9a\u7fa9\u7236\u985e\u5225\u7684\u5c6c\u6027\u884c\u70ba\uff0c\u5f9e\u800c\u9054\u5230\u66f4\u9ad8\u7a0b\u5ea6\u7684\u9748\u6d3b\u6027\u3002\u4ee5\u4e0b\u662f\u5c6c\u6027\u8986\u5beb\u7684\u7bc4\u4f8b\uff1a<\/p>\n
      \nclass Animal {\n    var sound: String {\n        return \"Some sound\"\n    }\n}\n\nclass Dog: Animal {\n    override var sound: String {\n        return \"Bark\"\n    }\n}\n<\/pre>\n
      \u9019\u6a23\uff0c\u7576\u4f60\u8abf\u7528 Dog<\/strong> \u7684 sound<\/strong> \u5c6c\u6027\u6642\uff0c\u5c07\u6703\u7372\u5f97 “Bark” \u7684\u7d50\u679c\u3002<\/p>\n
      \u7d50\u8ad6<\/h2>\n
      \u7e3d\u7d50\u4f86\u8aaa\uff0cSwift \u4e2d\u7684 Overriding \u529f\u80fd\u662f\u7269\u4ef6\u5c0e\u5411\u7a0b\u5f0f\u8a2d\u8a08\u7684\u4e00\u500b\u6838\u5fc3\u6982\u5ff5\uff0c\u80fd\u5920\u8b93\u958b\u767c\u8005\u5728\u7e7c\u627f\u7236\u985e\u5225\u7684\u540c\u6642\uff0c\u81ea\u5b9a\u7fa9\u548c\u64f4\u5c55\u529f\u80fd\u3002\u638c\u63e1\u9019\u4e00\u6280\u5de7\u5c0d\u65bc\u63d0\u5347\u60a8\u7684 Swift \u7de8\u7a0b\u80fd\u529b\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
      Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n
      Q1: \u70ba\u4ec0\u9ebc\u9700\u8981\u4f7f\u7528 override \u95dc\u9375\u5b57\uff1f<\/h3>\n
      A1: \u4f7f\u7528 override<\/strong> \u95dc\u9375\u5b57\u53ef\u4ee5\u660e\u78ba\u544a\u8a34\u7de8\u8b6f\u5668\u8a72\u65b9\u6cd5\u662f\u91cd\u65b0\u5b9a\u7fa9\u7684\uff0c\u9632\u6b62\u610f\u5916\u7684\u932f\u8aa4\u3002<\/p>\n
      Q2: \u53ef\u4ee5\u8986\u5beb\u7236\u985e\u5225\u7684\u6240\u6709\u65b9\u6cd5\u55ce\uff1f<\/h3>\n
      A2: \u4e0d\u53ef\u4ee5\uff0c\u53ea\u6709\u6a19\u8a18\u70ba open<\/strong> \u6216 public<\/strong> \u7684\u65b9\u6cd5\u624d\u80fd\u5728\u5b50\u985e\u5225\u4e2d\u8986\u5beb\u3002<\/p>\n
      Q3: \u5982\u679c\u4e0d\u60f3\u8b93\u5b50\u985e\u5225\u8986\u5beb\u7236\u985e\u5225\u7684\u65b9\u6cd5\u600e\u9ebc\u8fa6\uff1f<\/h3>\n
      A3: \u53ef\u4ee5\u5c07\u7236\u985e\u5225\u7684\u65b9\u6cd5\u6a19\u8a18\u70ba final<\/strong>\uff0c\u9019\u6a23\u5b50\u985e\u5225\u5c07\u7121\u6cd5\u8986\u5beb\u9019\u500b\u65b9\u6cd5\u3002<\/p>\n
      —<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u6587\u7ae0\u6458\u8981\uff1aSwift\u4e2d\u7684Override\u95dc\u9375\u5b57\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u8986\u84cb\u7236\u985e\u5225\u4e2d\u7684\u65b9\u6cd5\uff0c\u4ee5\u6539\u8b8a\u5176\u884c\u70ba\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39Override\u95dc\u9375\u5b57\u7684\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u793a\u4f8b\u4f86\u89e3\u91cb\u5b83\u7684\u7528\u6cd5\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","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-4257","post","type-post","status-publish","format-standard","hentry","category-ios","category-swift","tag-ios","tag-swift"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-16F","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4257","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=4257"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4257\/revisions"}],"predecessor-version":[{"id":4258,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4257\/revisions\/4258"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}