{"id":4095,"date":"2025-05-31T11:39:13","date_gmt":"2025-06-05T04:09:13","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4095"},"modified":"2025-06-05T11:39:13","modified_gmt":"2025-06-05T04:09:13","slug":"%e5%ad%b8%e7%bf%92swift%e4%b8%adoverridingdeclaration%e9%9c%80%e8%a6%81%e4%bd%bf%e7%94%a8override%e9%97%9c%e9%8d%b5%e5%ad%97","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e5%ad%b8%e7%bf%92swift%e4%b8%adoverridingdeclaration%e9%9c%80%e8%a6%81%e4%bd%bf%e7%94%a8override%e9%97%9c%e9%8d%b5%e5%ad%97\/","title":{"rendered":"2025 \u7248 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u4f7f\u7528 &#8216;override&#8217; \u95dc\u9375\u5b57\u9032\u884c Overriding Declaration"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Swift, Overriding, Declaration, Keyword, 2025, Swift \u6559\u5b78\"><\/p>\n<h1>2025 \u7248 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u4f7f\u7528 &#8216;override&#8217; \u95dc\u9375\u5b57\u9032\u884c Overriding Declaration<\/h1>\n<p>Swift \u662f\u4e00\u7a2e\u73fe\u4ee3\u5316\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u5176\u8a9e\u6cd5\u7c21\u6f54\u4e14\u5177\u53ef\u8b80\u6027\uff0c\u652f\u63f4\u591a\u7a2e\u9762\u5411\u5c0d\u8c61\u7684\u7279\u6027\u3002Overriding Declaration \u662f Swift \u4e2d\u4e00\u500b\u91cd\u8981\u7684\u7279\u6027\uff0c\u5141\u8a31\u958b\u767c\u8005\u5728\u5b50\u985e\u5225\u4e2d\u91cd\u65b0\u5b9a\u7fa9\u7236\u985e\u5225\u7684\u65b9\u6cd5\uff0c\u4f7f\u5f97\u7a0b\u5f0f\u78bc\u66f4\u5177\u5f48\u6027\u8207\u53ef\u91cd\u7528\u6027\u3002<\/p>\n<p>\u5728\u4f7f\u7528 Overriding Declaration \u6642\uff0c\u958b\u767c\u8005\u5fc5\u9808\u5728\u65b9\u6cd5\u5ba3\u544a\u524d\u52a0\u4e0a <code>override<\/code> \u95dc\u9375\u5b57\u3002\u82e5\u4e0d\u9019\u9ebc\u505a\uff0c\u5c07\u6703\u6536\u5230\u932f\u8aa4\u8a0a\u606f <strong>Overriding declaration requires an &#8216;override&#8217; keyword<\/strong>\u3002<\/p>\n<h2>\u70ba\u4ec0\u9ebc\u8981\u4f7f\u7528 <code>override<\/code> \u95dc\u9375\u5b57\uff1f<\/h2>\n<p>\u4f7f\u7528 <code>override<\/code> \u95dc\u9375\u5b57\u7684\u4e3b\u8981\u76ee\u7684\u662f\u8b93\u7a0b\u5f0f\u78bc\u66f4\u5177\u53ef\u8b80\u6027\uff0c\u8b93\u5176\u4ed6\u958b\u767c\u8005\uff08\u6216\u672a\u4f86\u7684\u81ea\u5df1\uff09\u80fd\u5920\u6e05\u695a\u8fa8\u8b58\u51fa\u54ea\u4e9b\u65b9\u6cd5\u662f\u5c0d\u7236\u985e\u5225\u7684\u91cd\u5beb\uff0c\u800c\u975e\u65b0\u7684\u65b9\u6cd5\u5ba3\u544a\u3002<\/p>\n<h3>\u5be6\u4f5c\u7bc4\u4f8b<\/h3>\n<p>\u4e0b\u9762\u662f\u4e00\u500b\u5be6\u4f5c\u7bc4\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 <code>override<\/code> \u95dc\u9375\u5b57\u4f86\u91cd\u65b0\u5b9a\u7fa9\u7236\u985e\u5225\u7684\u65b9\u6cd5\u3002<\/p>\n<pre class=\"brush: swift\">\nclass Person {\n    func sayHello() {\n        print(\"Hello!\")\n    }\n}\n\nclass Student: Person {\n    override func sayHello() {\n        print(\"Hi, I'm a student!\")\n    }\n}\n<\/pre>\n<p>\u5728\u4ee5\u4e0a\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b <code>Person<\/code> \u985e\u5225\uff0c\u4e26\u5728\u5176\u5167\u90e8\u5be6\u4f5c\u4e86 <code>sayHello()<\/code> \u65b9\u6cd5\u3002\u63a5\u8457\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u5b50\u985e\u5225 <code>Student<\/code>\uff0c\u4e26\u4f7f\u7528 <code>override<\/code> \u95dc\u9375\u5b57\u4f86\u91cd\u5beb <code>sayHello()<\/code> \u65b9\u6cd5\uff0c\u4ee5\u63d0\u4f9b\u4e0d\u540c\u7684\u56de\u61c9\u3002<\/p>\n<h3>\u932f\u8aa4\u6392\u9664<\/h3>\n<p>\u5982\u679c\u4f60\u5728\u5b50\u985e\u5225\u4e2d\u91cd\u65b0\u5b9a\u7fa9\u7236\u985e\u5225\u7684\u65b9\u6cd5\u6642\uff0c\u5fd8\u8a18\u52a0\u4e0a <code>override<\/code> \u95dc\u9375\u5b57\uff0cSwift \u7de8\u8b6f\u5668\u6703\u5831\u932f\uff0c\u63d0\u793a <strong>Overriding declaration requires an &#8216;override&#8217; keyword<\/strong>\u3002\u9019\u662f\u4e00\u500b\u5f88\u597d\u7684\u4fdd\u8b77\u6a5f\u5236\uff0c\u907f\u514d\u958b\u767c\u8005\u4e0d\u5c0f\u5fc3\u5275\u5efa\u65b0\u7684\u65b9\u6cd5\u800c\u5931\u53bb\u91cd\u5beb\u7684\u610f\u5716\u3002<\/p>\n<h3>\u5ef6\u4f38\u61c9\u7528<\/h3>\n<p>Overriding \u7684\u61c9\u7528\u4e0d\u50c5\u9650\u65bc\u57fa\u672c\u7684\u985e\u5225\u8207\u65b9\u6cd5\uff0c\u9084\u53ef\u4ee5\u7d50\u5408\u591a\u614b\u6027\u9032\u884c\u66f4\u8907\u96dc\u7684\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u900f\u904e\u4f7f\u7528\u76f8\u540c\u7684\u65b9\u6cd5\u540d\u7a31\u4f86\u8655\u7406\u4e0d\u540c\u7684\u8cc7\u6599\u578b\u5225\uff0c\u53ef\u4ee5\u5275\u5efa\u4e00\u500b\u66f4\u52a0\u9748\u6d3b\u7684\u7cfb\u7d71\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u5728 Swift \u4e2d\uff0c\u82e5\u8981\u4f7f\u7528 Overriding Declaration \u4f86\u91cd\u5beb\u7236\u985e\u5225\u7684\u65b9\u6cd5\uff0c\u5fc5\u9808\u5728\u65b9\u6cd5\u5ba3\u544a\u524d\u52a0\u4e0a <code>override<\/code> \u95dc\u9375\u5b57\uff0c\u4ee5\u907f\u514d\u7de8\u8b6f\u932f\u8aa4\u3002\u9019\u4e0d\u50c5\u63d0\u5347\u4e86\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\uff0c\u4e5f\u52a0\u5f37\u4e86\u7a0b\u5f0f\u7684\u7d50\u69cb\u5316\uff0c\u8b93\u958b\u767c\u8005\u80fd\u66f4\u6e05\u695a\u5730\u7406\u89e3\u7a0b\u5f0f\u7684\u904b\u884c\u908f\u8f2f\u3002<\/p>\n<h2>Q&#038;A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n<h3>Q1: \u70ba\u4ec0\u9ebc\u8981\u4f7f\u7528 Overriding Declaration\uff1f<\/h3>\n<p>A1: \u4f7f\u7528 Overriding Declaration \u5141\u8a31\u5b50\u985e\u5225\u91cd\u65b0\u5b9a\u7fa9\u7236\u985e\u5225\u7684\u65b9\u6cd5\uff0c\u9019\u6a23\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u7684\u9700\u6c42\u63d0\u4f9b\u4e0d\u540c\u7684\u5be6\u73fe\uff0c\u589e\u52a0\u7a0b\u5f0f\u78bc\u7684\u5f48\u6027\u8207\u53ef\u91cd\u7528\u6027\u3002<\/p>\n<h3>Q2: \u5982\u679c\u6211\u5fd8\u8a18\u4f7f\u7528 <code>override<\/code>\uff0c\u6703\u767c\u751f\u4ec0\u9ebc\u4e8b\uff1f<\/h3>\n<p>A2: \u5982\u679c\u5728\u5b50\u985e\u5225\u4e2d\u5fd8\u8a18\u4f7f\u7528 <code>override<\/code>\uff0cSwift \u7de8\u8b6f\u5668\u6703\u5831\u932f\uff0c\u63d0\u793a <strong>Overriding declaration requires an &#8216;override&#8217; keyword<\/strong>\uff0c\u9019\u662f\u4e00\u7a2e\u4fdd\u8b77\u6a5f\u5236\uff0c\u78ba\u4fdd\u958b\u767c\u8005\u660e\u78ba\u610f\u5716\u3002<\/p>\n<h3>Q3: Overriding \u53ef\u4ee5\u7528\u65bc\u54ea\u4e9b\u60c5\u6cc1\uff1f<\/h3>\n<p>A3: Overriding \u53ef\u4ee5\u7528\u65bc\u4efb\u4f55\u7e7c\u627f\u7684\u985e\u5225\u4e2d\uff0c\u7279\u5225\u662f\u7576\u4f60\u9700\u8981\u6839\u64da\u5177\u9ad4\u985e\u5225\u4f86\u66f4\u6539\u7236\u985e\u5225\u65b9\u6cd5\u7684\u884c\u70ba\u6642\uff0c\u4f8b\u5982\u5728\u958b\u767c\u904a\u6232\u6216\u61c9\u7528\u7a0b\u5f0f\u6642\uff0c\u901a\u904e\u4e0d\u540c\u7684\u5b50\u985e\u5225\u4f86\u5be6\u73fe\u5404\u81ea\u7368\u7279\u7684\u529f\u80fd\u3002<\/p>\n<p>&#8212;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1a\u5728Swift\u4e2d\uff0c\u5982\u679c\u8981\u8986\u84cb\u7236\u985e\u5225\u7684\u5ba3\u544a\uff0c\u5247\u5fc5\u9808\u4f7f\u7528&#8217;override&#8217;\u95dc\u9375\u5b57\uff0c\u4ee5\u78ba\u4fdd\u7a0b\u5f0f\u78bc\u7684\u6b63\u78ba\u6027\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39Swift\u4e2dOverridingDeclaration\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5982\u4f55\u907f\u514d\u51fa\u73fe\u932f\u8aa4\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-4095","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\/pcFK27-143","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4095","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=4095"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4095\/revisions"}],"predecessor-version":[{"id":4096,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4095\/revisions\/4096"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4095"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4095"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}