{"id":4135,"date":"2025-06-01T12:09:11","date_gmt":"2025-06-05T04:14:11","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4135"},"modified":"2025-06-05T12:09:11","modified_gmt":"2025-06-05T04:14:11","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%97-2","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%97-2\/","title":{"rendered":"2025 \u6700\u65b0 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u7406\u89e3 Overriding Declaration \u8207 ‘override’ \u95dc\u9375\u5b57\u7684\u91cd\u8981\u6027"},"content":{"rendered":"

<\/p>\n

2025 \u6700\u65b0 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u7406\u89e3 Overriding Declaration \u8207 ‘override’ \u95dc\u9375\u5b57\u7684\u91cd\u8981\u6027<\/h1>\n

Swift \u662f\u4e00\u7a2e\u73fe\u4ee3\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u8a9e\u6cd5\u7c21\u55ae\u6613\u61c2\uff0c\u4e26\u4e14\u652f\u63f4\u591a\u7a2e\u529f\u80fd\u7279\u6027\u3002\u672c\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e **Overriding Declaration**\uff0c\u9019\u662f Swift \u8a9e\u8a00\u4e2d\u4e00\u500b\u95dc\u9375\u7684\u7279\u6027\uff0c\u8b93\u958b\u767c\u8005\u80fd\u5920\u5728\u5b50\u985e\u5225\u4e2d\u91cd\u65b0\u5b9a\u7fa9\u7236\u985e\u5225\u7684\u65b9\u6cd5\uff0c\u4f46\u5fc5\u9808\u4f7f\u7528 **’override’** \u95dc\u9375\u5b57\u4f86\u9032\u884c\u6b63\u78ba\u7684\u5b9a\u7fa9\u3002<\/p>\n

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

Overriding Declaration \u5141\u8a31\u5b50\u985e\u5225\u91cd\u65b0\u5b9a\u7fa9\u5f9e\u7236\u985e\u5225\u7e7c\u627f\u7684\u65b9\u6cd5\u3002\u9019\u4e0d\u50c5\u6709\u52a9\u65bc\u6839\u64da\u5177\u9ad4\u9700\u6c42\u4fee\u6539\u65b9\u6cd5\u884c\u70ba\uff0c\u4e5f\u589e\u52a0\u4e86\u7a0b\u5f0f\u7684\u9748\u6d3b\u6027\u548c\u53ef\u64f4\u5c55\u6027\u3002\u7136\u800c\uff0c\u70ba\u4e86\u78ba\u4fdd\u5b89\u5168\u6027\u548c\u907f\u514d\u6f5b\u5728\u7684\u932f\u8aa4\uff0cSwift \u5f37\u5236\u8981\u6c42\u4f7f\u7528 **’override’** \u95dc\u9375\u5b57\u3002<\/p>\n

\u70ba\u4ec0\u9ebc\u8981\u4f7f\u7528 ‘override’ \u95dc\u9375\u5b57\uff1f<\/h2>\n

\u4f7f\u7528 **’override’** \u95dc\u9375\u5b57\u7684\u4e3b\u8981\u539f\u56e0\u662f\u9632\u6b62\u958b\u767c\u8005\u7121\u610f\u4e2d\u91cd\u5beb\u7236\u985e\u5225\u7684\u65b9\u6cd5\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u7a0b\u5f0f\u51fa\u73fe\u932f\u8aa4\u6216\u4e0d\u53ef\u9810\u671f\u7684\u884c\u70ba\u3002\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u4f60\u6709\u4e00\u500b\u7236\u985e\u5225 **Foo**\uff0c\u5b83\u6709\u4e00\u500b\u65b9\u6cd5 **bar()**\uff0c\u5982\u679c\u5728\u5b50\u985e\u5225 **Baz** \u4e2d\u5ba3\u544a\u4e86\u4e00\u500b\u540c\u540d\u7684\u65b9\u6cd5\u800c\u672a\u52a0\u4e0a **’override’**\uff0c\u4fbf\u6703\u51fa\u73fe\u932f\u8aa4\u8a0a\u606f\uff1a<\/p>\n

Overriding declaration requires an ‘override’ keyword<\/span>\u3002<\/p>\n

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

\u4ee5\u4e0b\u662f\u5982\u4f55\u6b63\u78ba\u4f7f\u7528 **’override’** \u95dc\u9375\u5b57\u7684\u7bc4\u4f8b\uff1a<\/p>\n

\nclass Foo {\n    func bar() {\n        print(\"Foo bar\")\n    }\n}\n\nclass Baz: Foo {\n    override func bar() {\n        print(\"Baz bar\")\n    }\n}\n<\/pre>\n
\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u5b50\u985e\u5225 **Baz** \u6b63\u78ba\u5730\u4f7f\u7528\u4e86 **’override’** \u95dc\u9375\u5b57\u4f86\u91cd\u65b0\u5b9a\u7fa9 **bar()** \u65b9\u6cd5\u3002\u9019\u6a23\uff0c\u7576\u4f60\u8abf\u7528 **Baz** \u7684 **bar()** \u65b9\u6cd5\u6642\uff0c\u5c07\u6703\u8f38\u51fa **”Baz bar”**\uff0c\u800c\u4e0d\u662f **”Foo bar”**\u3002<\/p>\n
\u932f\u8aa4\u6392\u9664<\/h2>\n
\u5982\u679c\u5728\u5b50\u985e\u5225\u4e2d\u6c92\u6709\u4f7f\u7528 **’override’** \u95dc\u9375\u5b57\uff0c\u5c07\u5c0e\u81f4\u7de8\u8b6f\u932f\u8aa4\u3002\u78ba\u4fdd\u5728\u91cd\u65b0\u5b9a\u7fa9\u4efb\u4f55\u5f9e\u7236\u985e\u5225\u7e7c\u627f\u7684\u65b9\u6cd5\u6642\uff0c\u59cb\u7d42\u4f7f\u7528\u9019\u500b\u95dc\u9375\u5b57\u4f86\u907f\u514d\u932f\u8aa4\u3002<\/p>\n
\u5ef6\u4f38\u61c9\u7528<\/h2>\n
Overriding \u4e0d\u50c5\u9650\u65bc\u65b9\u6cd5\u7684\u91cd\u5beb\uff0c\u9084\u53ef\u4ee5\u5728\u9700\u8981\u6642\u91cd\u5beb\u5c6c\u6027\u6216\u8a08\u7b97\u5c6c\u6027\u3002\u9019\u6a23\u53ef\u4ee5\u6839\u64da\u9700\u8981\u4fee\u6539\u5c6c\u6027\u884c\u70ba\uff0c\u589e\u5f37\u985e\u5225\u7684\u529f\u80fd\u3002\u4f8b\u5982\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
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c**Dog** \u985e\u5225\u91cd\u65b0\u5b9a\u7fa9\u4e86\u7236\u985e\u5225 **Animal** \u7684 **sound** \u5c6c\u6027\uff0c\u8fd4\u56de\u4e86\u4e0d\u540c\u7684\u503c\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728 Swift \u4e2d\u4f7f\u7528 Overriding Declaration \u6642\uff0c\u5fc5\u9808\u52a0\u4e0a **’override’** \u95dc\u9375\u5b57\uff0c\u4ee5\u907f\u514d\u51fa\u73fe\u7de8\u8b6f\u932f\u8aa4\u4e26\u78ba\u4fdd\u7a0b\u5f0f\u7684\u6b63\u78ba\u904b\u884c\u3002\u9019\u500b\u8a2d\u8a08\u4e0d\u50c5\u63d0\u9ad8\u4e86\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\uff0c\u4e5f\u5e6b\u52a9\u958b\u767c\u8005\u6df1\u5165\u7406\u89e3\u5176\u7a0b\u5f0f\u7d50\u69cb\u3002<\/p>\n
Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n
Q1: \u70ba\u4ec0\u9ebc Swift \u8981\u6c42\u4f7f\u7528 ‘override’ \u95dc\u9375\u5b57\uff1f<\/h3>\n
A1: Swift \u8981\u6c42\u4f7f\u7528 ‘override’ \u95dc\u9375\u5b57\u662f\u70ba\u4e86\u9632\u6b62\u958b\u767c\u8005\u5728\u4e0d\u77e5\u60c5\u7684\u60c5\u6cc1\u4e0b\u91cd\u5beb\u7236\u985e\u5225\u7684\u65b9\u6cd5\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u932f\u8aa4\u4e26\u589e\u5f37\u7a0b\u5f0f\u7684\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n
Q2: \u5982\u4f55\u77e5\u9053\u4f55\u6642\u9700\u8981\u4f7f\u7528 ‘override’ \u95dc\u9375\u5b57\uff1f<\/h3>\n
A2: \u7576\u4f60\u5728\u5b50\u985e\u5225\u4e2d\u91cd\u65b0\u5b9a\u7fa9\u5f9e\u7236\u985e\u5225\u7e7c\u627f\u7684\u65b9\u6cd5\u6216\u5c6c\u6027\u6642\uff0c\u90fd\u9700\u8981\u4f7f\u7528 ‘override’ \u95dc\u9375\u5b57\u3002<\/p>\n
Q3: \u4f7f\u7528 ‘override’ \u95dc\u9375\u5b57\u6709\u4ec0\u9ebc\u597d\u8655\uff1f<\/h3>\n
A3: \u4f7f\u7528 ‘override’ \u95dc\u9375\u5b57\u80fd\u5920\u6e05\u695a\u5730\u8868\u660e\u4f60\u6b63\u5728\u91cd\u65b0\u5b9a\u7fa9\u7236\u985e\u5225\u7684\u65b9\u6cd5\uff0c\u9019\u6709\u52a9\u65bc\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u964d\u4f4e\u932f\u8aa4\u7387\u3002<\/p>\n
—<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1aSwift\u8a9e\u8a00\u4e2d\uff0c\u8986\u5beb\uff08overriding\uff09\u5ba3\u544a\u9700\u8981\u4f7f\u7528’override’\u95dc\u9375\u5b57\uff0c\u4ee5\u78ba\u4fdd\u7a0b\u5f0f\u78bc\u7684\u6b63\u78ba\u6027\u548c\u53ef\u9760\u6027\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39Swift\u4e2d’override’\u95dc\u9375\u5b57\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5b83\u7684\u512a\u9ede\u548c\u529f\u80fd\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-4135","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\/pcFK27-14H","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4135","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=4135"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4135\/revisions"}],"predecessor-version":[{"id":4136,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4135\/revisions\/4136"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4135"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}