{"id":4171,"date":"2025-06-01T13:39:02","date_gmt":"2025-06-04T06:08:01","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4171"},"modified":"2025-06-04T13:39:02","modified_gmt":"2025-06-04T06:08:01","slug":"%e4%ba%86%e8%a7%a3swift%e4%b8%ad%e4%b8%8d%e5%8f%af%e8%ae%8a%e5%80%bc%e7%9a%84mutating%e6%88%90%e5%93%a1-3","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%84mutating%e6%88%90%e5%93%a1-3\/","title":{"rendered":"\u6df1\u5165\u89e3\u6790 Swift \u932f\u8aa4\uff1a\u5982\u4f55\u89e3\u6c7a\u300cCannot Use Mutating Member on Immutable Value\u300d"},"content":{"rendered":"

<\/p>\n

\u6df1\u5165\u89e3\u6790 Swift \u932f\u8aa4\uff1a\u5982\u4f55\u89e3\u6c7a\u300cCannot Use Mutating Member on Immutable Value\u300d<\/h1>\n

\u5728\u4f7f\u7528 Swift \u9019\u7a2e\u5f37\u5927\u7684\u7de8\u7a0b\u8a9e\u8a00\u6642\uff0c\u4f60\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u8a0a\u606f\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u53ef\u8b8a\u8207\u4e0d\u53ef\u8b8a\u503c\u6642\u3002\u5176\u4e2d\uff0c\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\u662f\u300cCannot use mutating member on immutable value: ‘X’\u300d\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u610f\u7fa9\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u4f60\u63d0\u9ad8 Swift \u7a0b\u5f0f\u78bc\u7684\u8cea\u91cf\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u300cCannot Use Mutating Member on Immutable Value\u300d\uff1f<\/h2>\n

\u300cCannot use mutating member on immutable value: ‘X’\u300d\u662f Swift \u4e2d\u7684\u4e00\u500b\u932f\u8aa4\u63d0\u793a\uff0c\u9019\u8868\u793a\u4f60\u8a66\u5716\u5c0d\u4e00\u500b\u4e0d\u53ef\u8b8a\u7684\u503c\uff08immutable value\uff09\u4f7f\u7528\u8b8a\u5316\u6210\u54e1\uff08mutating member\uff09\u3002\u5728 Swift \u4e2d\uff0c\u503c\u53ef\u5206\u70ba\u5169\u985e\uff1a\u53ef\u8b8a\uff08mutable\uff09\u548c\u4e0d\u53ef\u8b8a\uff08immutable\uff09\u3002\u53ef\u8b8a\u503c\u5141\u8a31\u5728\u7a0b\u5f0f\u57f7\u884c\u904e\u7a0b\u4e2d\u9032\u884c\u4fee\u6539\uff0c\u800c\u4e0d\u53ef\u8b8a\u503c\u5247\u4e0d\u80fd\u88ab\u6539\u8b8a\u3002<\/p>\n

\u7576\u4f60\u5617\u8a66\u5c0d\u4e0d\u53ef\u8b8a\u7684\u503c\u4f7f\u7528\u8b8a\u5316\u6210\u54e1\u6642\uff0cSwift \u6703\u5f15\u767c\u6b64\u932f\u8aa4\uff0c\u63d0\u793a\u4f60\u7121\u6cd5\u9032\u884c\u9019\u6a23\u7684\u64cd\u4f5c\u3002<\/p>\n

\u5982\u4f55\u89e3\u6c7a\u300cCannot Use Mutating Member on Immutable Value\u300d\u932f\u8aa4\uff1f<\/h2>\n

\u89e3\u6c7a\u6b64\u932f\u8aa4\u7684\u95dc\u9375\u5728\u65bc\u5c07\u4e0d\u53ef\u8b8a\u7684\u503c\u8f49\u63db\u70ba\u53ef\u8b8a\u7684\u503c\uff0c\u7136\u5f8c\u518d\u4f7f\u7528\u8b8a\u5316\u6210\u54e1\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u5e0c\u671b\u5c0d\u4e00\u500b\u4e0d\u53ef\u8b8a\u7684\u9663\u5217\u4f7f\u7528 append()<\/code> \u65b9\u6cd5\uff0c\u4ee3\u78bc\u5982\u4e0b\uff1a<\/p>\n

\nlet array = [1, 2, 3]\narray.append(4) \/\/ \u9019\u88e1\u6703\u5f15\u767c\u932f\u8aa4\n<\/pre>\n
\u4e0a\u8ff0\u4ee3\u78bc\u5c07\u5f15\u767c\u300cCannot use mutating member on immutable value: ‘array’\u300d\u932f\u8aa4\uff0c\u56e0\u70ba array<\/code> \u88ab\u5b9a\u7fa9\u70ba\u4e0d\u53ef\u8b8a\u7684\u3002<\/p>\n
\u8981\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u53ea\u9700\u5c07 array<\/code> \u5b9a\u7fa9\u70ba\u53ef\u8b8a\u7684\uff0c\u50cf\u9019\u6a23\uff1a<\/p>\n
\nvar array = [1, 2, 3]\narray.append(4) \/\/ \u73fe\u5728\u53ef\u4ee5\u6b63\u5e38\u57f7\u884c\n<\/pre>\n
\u9019\u6a23\u4fee\u6539\u5f8c\uff0c\u7a0b\u5f0f\u78bc\u5c07\u6b63\u5e38\u57f7\u884c\uff0c\u56e0\u70ba array<\/code> \u73fe\u5728\u662f\u53ef\u8b8a\u7684\uff0c\u5141\u8a31\u4f7f\u7528\u8b8a\u5316\u6210\u54e1\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u300cCannot use mutating member on immutable value: ‘X’\u300d\u662f\u4e00\u500b\u5e38\u898b\u7684 Swift \u932f\u8aa4\uff0c\u901a\u5e38\u7531\u65bc\u5617\u8a66\u5728\u4e0d\u53ef\u8b8a\u7684\u503c\u4e0a\u4f7f\u7528\u8b8a\u5316\u6210\u54e1\u800c\u5f15\u767c\u3002\u89e3\u6c7a\u6b64\u554f\u984c\u7684\u6709\u6548\u65b9\u6cd5\u662f\u5c07\u4e0d\u53ef\u8b8a\u503c\u8f49\u63db\u70ba\u53ef\u8b8a\u503c\uff0c\u7136\u5f8c\u518d\u9032\u884c\u64cd\u4f5c\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u5347\u4f60\u7684\u7a0b\u5f0f\u78bc\u54c1\u8cea\uff0c\u9084\u80fd\u589e\u5f37\u5c0d Swift \u8a9e\u8a00\u7684\u7406\u89e3\u3002<\/p>\n
\u900f\u904e\u9019\u7bc7\u6587\u7ae0\u7684\u89e3\u6790\u548c\u793a\u4f8b\uff0c\u4f60\u61c9\u8a72\u80fd\u5920\u66f4\u81ea\u4fe1\u5730\u8655\u7406 Swift \u4e2d\u7684\u53ef\u8b8a\u6027\u554f\u984c\uff0c\u907f\u514d\u672a\u4f86\u7684\u932f\u8aa4\u3002\u5e0c\u671b\u9019\u80fd\u5e6b\u52a9\u4f60\u5728 Swift \u958b\u767c\u4e4b\u8def\u4e0a\u66f4\u9032\u4e00\u6b65\uff01
\n—<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u89e3\u91cbSwift\u4e2d\u4e0d\u53ef\u8b8a\u503c\u7684mutating\u6210\u54e1\uff0c\u4ee5\u53ca\u5982\u4f55\u907f\u514d\u51fa\u73fe\u201cCannotusemutatingmemberonimmutablevalue\u201d\u7684\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-4171","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\/pcFK27-15h","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4171","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=4171"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4171\/revisions"}],"predecessor-version":[{"id":4172,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4171\/revisions\/4172"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}