{"id":4213,"date":"2025-05-28T13:23:45","date_gmt":"2025-06-04T06:08:44","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4213"},"modified":"2025-06-04T13:23:45","modified_gmt":"2025-06-04T06:08:44","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%a1-4","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%a1-4\/","title":{"rendered":"\u6df1\u5165\u89e3\u6790 Swift \u932f\u8aa4\uff1a\u89e3\u6c7a\u300cCannot use mutating member on immutable value: ‘X’\u300d\u7684\u6709\u6548\u65b9\u6cd5"},"content":{"rendered":"

<\/p>\n

\u6df1\u5165\u89e3\u6790 Swift \u932f\u8aa4\uff1a\u89e3\u6c7a\u300cCannot use mutating member on immutable value: ‘X’\u300d\u7684\u6709\u6548\u65b9\u6cd5<\/h1>\n

Swift \u662f\u4e00\u7a2e\u529f\u80fd\u5f37\u5927\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u4f46\u5728\u7a0b\u5f0f\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u5e38\u5e38\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u5c08\u6ce8\u65bc\u4e00\u500b\u5e38\u898b\u7684 Swift \u932f\u8aa4\uff1a\u300cCannot use mutating member on immutable value: ‘X’\u300d\u3002\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u542b\u7fa9\uff0c\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u5730\u89e3\u6c7a\u5b83\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u300cCannot use mutating member on immutable value: ‘X’\u300d\uff1f<\/h2>\n

\u7576\u4f60\u770b\u5230\u300cCannot use mutating member on immutable value: ‘X’\u300d\u9019\u500b\u932f\u8aa4\u6642\uff0c\u8868\u793a\u4f60\u5617\u8a66\u5728\u4e00\u500b\u4e0d\u53ef\u8b8a\u7684\u503c\u4e0a\u4f7f\u7528\u8b8a\u5f62\u6210\u54e1\uff08mutating member\uff09\u3002\u8b8a\u5f62\u6210\u54e1\u662f\u4e00\u7a2e\u53ef\u4ee5\u4fee\u6539\u7269\u4ef6\u72c0\u614b\u7684\u65b9\u6cd5\uff0c\u4f46\u5b83\u50c5\u9069\u7528\u65bc\u53ef\u8b8a\u7269\u4ef6\uff0c\u9019\u662f Swift \u8a9e\u8a00\u70ba\u4e86\u7dad\u8b77\u7a0b\u5f0f\u5b89\u5168\u6027\u800c\u8a2d\u8a08\u7684\u9650\u5236\u3002<\/p>\n

\u70ba\u4ec0\u9ebc\u4e0d\u53ef\u8b8a\u503c\u4e0d\u80fd\u4f7f\u7528\u8b8a\u5f62\u6210\u54e1\uff1f<\/h2>\n

Swift \u7684\u8a2d\u8a08\u5b97\u65e8\u4e4b\u4e00\u662f\u63d0\u4f9b\u5b89\u5168\u6027\u548c\u7a69\u5b9a\u6027\u3002\u4e0d\u53ef\u8b8a\u7684\u503c\u5728\u5275\u5efa\u5f8c\u7121\u6cd5\u66f4\u6539\uff0c\u9019\u6a23\u7684\u7279\u6027\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u907f\u514d\u4e00\u4e9b\u5e38\u898b\u7684\u932f\u8aa4\u548c\u5d29\u6f70\u60c5\u6cc1\u3002\u56e0\u6b64\uff0c\u7576\u4f60\u8a66\u5716\u5c0d\u9019\u4e9b\u4e0d\u53ef\u8b8a\u503c\u4f7f\u7528\u8b8a\u5f62\u6210\u54e1\u6642\uff0cSwift \u6703\u4e3b\u52d5\u62cb\u51fa\u932f\u8aa4\uff0c\u4ee5\u9632\u6b62\u6f5b\u5728\u7684\u554f\u984c\u3002<\/p>\n

\u5982\u4f55\u6709\u6548\u89e3\u6c7a\u300cCannot use mutating member on immutable value: ‘X’\u300d\uff1f<\/h2>\n

\u8981\u89e3\u6c7a\u6b64\u932f\u8aa4\uff0c\u65b9\u6cd5\u662f\u5c07\u4e0d\u53ef\u8b8a\u7684\u503c\u8f49\u63db\u70ba\u53ef\u8b8a\u7684\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u7bc4\uff0c\u5c55\u793a\u5982\u4f55\u5c07\u4e0d\u53ef\u8b8a\u9663\u5217\u8f49\u63db\u70ba\u53ef\u8b8a\u9663\u5217\uff0c\u7136\u5f8c\u6210\u529f\u4f7f\u7528\u8b8a\u5f62\u6210\u54e1\uff1a<\/p>\n

\n\/\/ \u4e0d\u53ef\u8b8a\u7684\u9663\u5217\nlet array = [1, 2, 3]\n\n\/\/ \u5c07\u5176\u8f49\u63db\u70ba\u53ef\u8b8a\u7684\u9663\u5217\nvar mutableArray = array\n\n\/\/ \u4f7f\u7528\u8b8a\u5f62\u6210\u54e1\nmutableArray.append(4)\n\n\/\/ \u5370\u51fa\u53ef\u8b8a\u9663\u5217\u7684\u5167\u5bb9\nprint(mutableArray) \/\/ \u8f38\u51fa\uff1a[1, 2, 3, 4]\n<\/pre>\n
\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5275\u5efa\u4e86\u4e00\u500b\u4e0d\u53ef\u8b8a\u7684\u9663\u5217\uff0c\u7136\u5f8c\u5c07\u5176\u8907\u88fd\u5230\u4e00\u500b\u53ef\u8b8a\u7684\u9663\u5217\u4e2d\u3002\u9019\u6a23\u4e00\u4f86\uff0c\u6211\u5011\u5c31\u53ef\u4ee5\u5b89\u5168\u5730\u4f7f\u7528\u8b8a\u5f62\u6210\u54e1\uff0c\u4e26\u6210\u529f\u89e3\u6c7a\u4e86\u8a72\u932f\u8aa4\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u300cCannot use mutating member on immutable value: ‘X’\u300d\u662f\u4e00\u500b\u5e38\u898b\u7684 Swift \u932f\u8aa4\uff0c\u5b83\u63d0\u9192\u958b\u767c\u8005\u5728\u8655\u7406\u4e0d\u53ef\u8b8a\u503c\u6642\u9700\u8b39\u614e\u3002\u901a\u904e\u5c07\u4e0d\u53ef\u8b8a\u503c\u8f49\u63db\u70ba\u53ef\u8b8a\u503c\uff0c\u4f60\u53ef\u4ee5\u8f15\u9b06\u5730\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u78ba\u4fdd\u4f60\u7684\u7a0b\u5f0f\u78bc\u66f4\u70ba\u7a69\u5b9a\u3002<\/p>\n
\u5e0c\u671b\u672c\u6587\u80fd\u5e6b\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u9019\u500b\u932f\u8aa4\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u8b93\u4f60\u5728 Swift \u958b\u767c\u4e2d\u6e38\u5203\u6709\u9918\uff01<\/p>\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-4213","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\/pcFK27-15X","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4213","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=4213"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4213\/revisions"}],"predecessor-version":[{"id":4214,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4213\/revisions\/4214"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4213"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4213"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}