{"id":4127,"date":"2025-06-03T12:00:15","date_gmt":"2025-06-05T04:13:14","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4127"},"modified":"2025-06-05T12:00:15","modified_gmt":"2025-06-05T04:13:14","slug":"%e4%ba%86%e8%a7%a3swift%e4%b8%ad%e4%b8%8d%e5%8f%af%e8%ae%8a%e5%80%bc%e7%9a%84%e7%aa%81%e8%ae%8a%e5%8f%96%e5%80%bc-2","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e4%ba%86%e8%a7%a3swift%e4%b8%ad%e4%b8%8d%e5%8f%af%e8%ae%8a%e5%80%bc%e7%9a%84%e7%aa%81%e8%ae%8a%e5%8f%96%e5%80%bc-2\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Swift \u4e2d\u4e0d\u53ef\u8b8a\u503c\u7684\u7a81\u8b8a\u53d6\u5f97\u5668\u932f\u8aa4\u53ca\u89e3\u6c7a\u65b9\u6848 (2025 \u6700\u65b0\u7248)"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Swift, Error Parsing, Mutating Getter, Immutable Value, Swift 2025\"><\/p>\n<h1>\u89e3\u6790 Swift \u932f\u8aa4\uff1a\u300cCannot use mutating getter on immutable value: &#8216;X&#8217;\u300d<\/h1>\n<p>Swift \u662f\u4e00\u7a2e\u529f\u80fd\u5f37\u5927\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u4f46\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u3002\u5176\u4e2d\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\u662f\u300cCannot use mutating getter on immutable value: &#8216;X&#8217;\u300d\u3002\u9019\u500b\u932f\u8aa4\u7684\u610f\u601d\u662f\uff0c\u4f60\u4e0d\u80fd\u5728\u4e0d\u53ef\u8b8a\u7684\u503c\u4e0a\u4f7f\u7528\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u8a73\u7d30\u8aaa\u660e\u9019\u500b\u932f\u8aa4\u7684\u6839\u6e90\u3001\u89e3\u6c7a\u65b9\u6cd5\u53ca\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2>\u4ec0\u9ebc\u662f\u4e0d\u53ef\u8b8a\u7684\u503c\uff1f<\/h2>\n<p>\u4e0d\u53ef\u8b8a\u7684\u503c\u662f\u6307\u5728\u5b9a\u7fa9\u5f8c\u7121\u6cd5\u88ab\u6539\u8b8a\u7684\u503c\u3002\u5728 Swift \u4e2d\uff0c\u4e0d\u53ef\u8b8a\u7684\u503c\u662f\u4f7f\u7528 `let` \u95dc\u9375\u5b57\u4f86\u5ba3\u544a\u7684\u8b8a\u6578\u3002\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u4e0d\u53ef\u8b8a\u7684\u5b57\u4e32\u8b8a\u6578\uff1a<\/p>\n<pre class=\"brush: swift\">let myString = \"Hello World\"<\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`myString` \u662f\u4e00\u500b\u4e0d\u53ef\u8b8a\u7684\u8b8a\u6578\uff0c\u56e0\u70ba\u5b83\u662f\u4f7f\u7528 `let` \u95dc\u9375\u5b57\u5ba3\u544a\u7684\u3002<\/p>\n<h2>\u4ec0\u9ebc\u662f\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\uff1f<\/h2>\n<p>\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\u662f\u6307\u80fd\u5920\u4fee\u6539\u5176\u72c0\u614b\u7684\u51fd\u5f0f\u3002\u5728 Swift \u4e2d\uff0c\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\u662f\u4f7f\u7528 `mutating` \u95dc\u9375\u5b57\u5ba3\u544a\u7684\u51fd\u5f0f\u3002\u4ee5\u4e0b\u662f\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre class=\"brush: swift\">struct Greeting {\n    var message: String\n\n    mutating func changeMessage(newMessage: String) {\n        message = newMessage\n    }\n}\n\nvar greeting = Greeting(message: \"Hello World\")\ngreeting.changeMessage(newMessage: \"Goodbye World\")<\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c`changeMessage` \u662f\u4e00\u500b\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\uff0c\u56e0\u70ba\u5b83\u4f7f\u7528\u4e86 `mutating` \u95dc\u9375\u5b57\uff0c\u4e26\u4e14\u53ef\u4ee5\u6539\u8b8a `greeting.message` \u7684\u503c\u3002<\/p>\n<h2>\u70ba\u4ec0\u9ebc\u4e0d\u80fd\u5728\u4e0d\u53ef\u8b8a\u7684\u503c\u4e0a\u4f7f\u7528\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\uff1f<\/h2>\n<p>\u7531\u65bc\u4e0d\u53ef\u8b8a\u7684\u503c\u5728\u5ba3\u544a\u5f8c\u4e0d\u80fd\u88ab\u66f4\u6539\uff0c\u56e0\u6b64\u7121\u6cd5\u5728\u5176\u4e0a\u4f7f\u7528\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\u3002\u5982\u679c\u5728\u4e0d\u53ef\u8b8a\u7684\u503c\u4e0a\u5617\u8a66\u4f7f\u7528\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\uff0cSwift \u5c07\u6703\u5f15\u767c\u300cCannot use mutating getter on immutable value: &#8216;X&#8217;\u300d\u7684\u932f\u8aa4\u3002\u9019\u662f\u56e0\u70ba Swift \u9700\u8981\u78ba\u4fdd\u8b8a\u6578\u7684\u5b8c\u6574\u6027\u8207\u5b89\u5168\u6027\u3002<\/p>\n<h2>\u5982\u4f55\u89e3\u6c7a\u300cCannot use mutating getter on immutable value: &#8216;X&#8217;\u300d\u7684\u932f\u8aa4\uff1f<\/h2>\n<p>\u8981\u89e3\u6c7a\u6b64\u932f\u8aa4\uff0c\u4f60\u9700\u8981\u5c07\u4e0d\u53ef\u8b8a\u7684\u503c\u6539\u70ba\u53ef\u8b8a\u7684\u503c\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528 `var` \u95dc\u9375\u5b57\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre class=\"brush: swift\">var myString = \"Hello World\"<\/pre>\n<p>\u73fe\u5728\uff0c\u4f60\u53ef\u4ee5\u5728 `myString` \u4e0a\u4f7f\u7528\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\uff0c\u800c\u4e0d\u6703\u51fa\u73fe\u300cCannot use mutating getter on immutable value: &#8216;X&#8217;\u300d\u7684\u932f\u8aa4\u3002\u5982\u679c\u4f60\u9700\u8981\u5728\u7d50\u69cb\u9ad4\u4e2d\u4f7f\u7528\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\uff0c\u8acb\u78ba\u4fdd\u8a72\u7d50\u69cb\u9ad4\u7684\u5be6\u4f8b\u662f\u53ef\u8b8a\u7684\u3002<\/p>\n<h2>\u6700\u4f73\u5be6\u8e10\u8207\u5ef6\u4f38\u61c9\u7528<\/h2>\n<p>1. **\u4f7f\u7528\u985e\u578b\u6aa2\u67e5**\uff1a\u5728\u4f7f\u7528\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\u4e4b\u524d\uff0c\u78ba\u4fdd\u4f60\u7684\u8b8a\u6578\u662f\u53ef\u8b8a\u7684\uff0c\u9019\u53ef\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u932f\u8aa4\u3002<\/p>\n<p>2. **\u8003\u616e\u4f7f\u7528\u985e\u5225**\uff1a\u5982\u679c\u4f60\u9700\u8981\u66f4\u6539\u7684\u5c6c\u6027\u8f03\u591a\uff0c\u4e0d\u59a8\u8003\u616e\u4f7f\u7528\u985e\u5225\uff0c\u56e0\u70ba\u985e\u5225\u7684\u5be6\u4f8b\u662f\u5f15\u7528\u985e\u578b\uff0c\u4e26\u4e14\u53ef\u4ee5\u6539\u8b8a\u5176\u5c6c\u6027\u800c\u4e0d\u6703\u5f15\u767c\u4e0d\u53ef\u8b8a\u7684\u932f\u8aa4\u3002<\/p>\n<p>3. **\u932f\u8aa4\u6392\u9664**\uff1a\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u8acb\u5b9a\u671f\u6aa2\u67e5\u8b8a\u6578\u7684\u53ef\u8b8a\u6027\uff0c\u4e26\u4f7f\u7528 Xcode \u7684\u7de8\u8b6f\u932f\u8aa4\u63d0\u793a\u4f86\u5e6b\u52a9\u8b58\u5225\u554f\u984c\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u8a73\u7d30\u63a2\u8a0e\u4e86 Swift \u932f\u8aa4\u300cCannot use mutating getter on immutable value: &#8216;X&#8217;\u300d\u7684\u539f\u56e0\u53ca\u89e3\u6c7a\u65b9\u6848\u3002\u4e0d\u53ef\u8b8a\u7684\u503c\u662f\u7121\u6cd5\u88ab\u66f4\u6539\u7684\uff0c\u800c\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\u5247\u662f\u7528\u4f86\u4fee\u6539\u8b8a\u6578\u7684\u3002\u5982\u679c\u4f60\u9047\u5230\u6b64\u932f\u8aa4\uff0c\u8acb\u78ba\u8a8d\u8b8a\u6578\u7684\u53ef\u8b8a\u6027\uff0c\u4e26\u9069\u7576\u5730\u4f7f\u7528 `var` \u95dc\u9375\u5b57\u4f86\u5b9a\u7fa9\u8b8a\u6578\u3002<\/p>\n<h2>Q&#038;A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n<h3>1. \u70ba\u4ec0\u9ebc Swift \u8981\u4f7f\u7528\u4e0d\u53ef\u8b8a\u503c\uff1f<\/h3>\n<p>\u4e0d\u53ef\u8b8a\u503c\u6709\u52a9\u65bc\u63d0\u9ad8\u7a0b\u5f0f\u7684\u5b89\u5168\u6027\u8207\u53ef\u9810\u6e2c\u6027\uff0c\u6e1b\u5c11\u610f\u5916\u4fee\u6539\u7684\u98a8\u96aa\u3002<\/p>\n<h3>2. \u53ef\u4ee5\u5c07\u4e0d\u53ef\u8b8a\u7684\u7d50\u69cb\u9ad4\u8f49\u63db\u70ba\u53ef\u8b8a\u7684\u55ce\uff1f<\/h3>\n<p>\u53ef\u4ee5\uff0c\u4f46\u5fc5\u9808\u5728\u5ba3\u544a\u6642\u4f7f\u7528 `var` \u95dc\u9375\u5b57\u4f86\u78ba\u4fdd\u7d50\u69cb\u9ad4\u5be6\u4f8b\u662f\u53ef\u8b8a\u7684\u3002<\/p>\n<h3>3. \u5728\u4ec0\u9ebc\u60c5\u6cc1\u4e0b\u61c9\u8a72\u4f7f\u7528\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\uff1f<\/h3>\n<p>\u7576\u4f60\u9700\u8981\u6839\u64da\u67d0\u4e9b\u689d\u4ef6\u4fee\u6539\u5c6c\u6027\u6642\uff0c\u8b8a\u66f4\u7684\u53d6\u5f97\u5668\u975e\u5e38\u6709\u7528\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u8907\u96dc\u6578\u64da\u6642\u3002<\/p>\n<p>&#8212;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6458\u8981\uff1a\u672c\u6587\u5c07\u89e3\u91cbSwift\u4e2d\u4e0d\u53ef\u8b8a\u503c\u7684\u7a81\u8b8a\u53d6\u503c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u6280\u5de7\u4f86\u89e3\u6c7a\u201cCannotusemutatinggetteronimmutablevalue:&#8217;X&#8217;\u201d\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-4127","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\/pcFK27-14z","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4127","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=4127"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4127\/revisions"}],"predecessor-version":[{"id":4128,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4127\/revisions\/4128"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}