{"id":4265,"date":"2025-05-31T11:41:23","date_gmt":"2025-06-05T04:33:22","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4265"},"modified":"2025-06-05T11:41:23","modified_gmt":"2025-06-05T04:33:22","slug":"%e5%ad%b8%e7%bf%92swift%e4%b8%ad%e7%9a%84for-in%e8%aa%9e%e5%8f%a5-5","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e5%ad%b8%e7%bf%92swift%e4%b8%ad%e7%9a%84for-in%e8%aa%9e%e5%8f%a5-5\/","title":{"rendered":"2025 \u6700\u65b0 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u89e3\u6c7a\u300cExpected &#8216;in&#8217; in for-in statement\u300d\u932f\u8aa4"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Swift, for-in statement, Swift \u932f\u8aa4, Expected 'in', Swift \u6559\u5b78, Swift \u7a0b\u5f0f\u8a2d\u8a08\"><\/p>\n<h1>2025 \u6700\u65b0 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u89e3\u6c7a\u300cExpected &#8216;in&#8217; in for-in statement\u300d\u932f\u8aa4<\/h1>\n<p>Swift \u662f\u4e00\u7a2e\u73fe\u4ee3\u5316\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc iOS \u548c macOS \u958b\u767c\u3002\u5b78\u7fd2 Swift \u6642\uff0c\u60a8\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u8a0a\u606f\uff0c\u5176\u4e2d\u300c<strong>Expected &#8216;in&#8217; in for-in statement<\/strong>\u300d\u662f\u6700\u5e38\u898b\u4e4b\u4e00\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u70ba\u60a8\u6df1\u5165\u89e3\u6790\u6b64\u932f\u8aa4\u7684\u6210\u56e0\u53ca\u89e3\u6c7a\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u5be6\u4f5c\u7bc4\u4f8b\u4ee5\u5354\u52a9\u60a8\u7684\u5b78\u7fd2\u3002<\/p>\n<h2>\u7406\u89e3\u300cExpected &#8216;in&#8217; in for-in statement\u300d\u932f\u8aa4<\/h2>\n<p>\u9019\u500b\u932f\u8aa4\u8a0a\u606f\u8868\u660e\uff0c\u5728\u4f7f\u7528 for-in \u8ff4\u5708\u6642\uff0c\u5fc5\u9808\u52a0\u4e0a <code>in<\/code> \u95dc\u9375\u5b57\u3002\u4ee5\u4e0b\u662f\u6b63\u78ba\u7684 for-in \u8ff4\u5708\u7bc4\u4f8b\uff1a<\/p>\n<pre class=\"brush: swift\">\nfor item in array {\n    \/\/ \u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\n}\n<\/pre>\n<p>\u5982\u679c\u60a8\u7701\u7565\u4e86 <code>in<\/code> \u95dc\u9375\u5b57\uff0c\u5c31\u6703\u6536\u5230\u300c<strong>Expected &#8216;in&#8217; in for-in statement<\/strong>\u300d\u7684\u932f\u8aa4\u8a0a\u606f\uff1a<\/p>\n<pre class=\"brush: swift\">\nfor item array {\n    \/\/ \u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\n}\n<\/pre>\n<h2>\u4f7f\u7528 where \u95dc\u9375\u5b57\u9032\u884c\u5143\u7d20\u7be9\u9078<\/h2>\n<p>\u9664\u4e86\u57fa\u672c\u7684 for-in \u8ff4\u5708\uff0cSwift \u4e5f\u5141\u8a31\u4f7f\u7528 <code>where<\/code> \u95dc\u9375\u5b57\u4f86\u7be9\u9078\u9663\u5217\u4e2d\u7684\u5143\u7d20\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>where<\/code> \u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre class=\"brush: swift\">\nfor item in array where item > 10 {\n    \/\/ \u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\n}\n<\/pre>\n<p>\u82e5\u683c\u5f0f\u932f\u8aa4\uff0c\u540c\u6a23\u6703\u5c0e\u81f4\u300c<strong>Expected &#8216;in&#8217; in for-in statement<\/strong>\u300d\u7684\u932f\u8aa4\u8a0a\u606f\uff1a<\/p>\n<pre class=\"brush: swift\">\nfor item in array item > 10 {\n    \/\/ \u57f7\u884c\u67d0\u4e9b\u64cd\u4f5c\n}\n<\/pre>\n<h2>\u5982\u4f55\u89e3\u6c7a\u300cExpected &#8216;in&#8217; in for-in statement\u300d\u7684\u932f\u8aa4\uff1f<\/h2>\n<p>\u89e3\u6c7a\u9019\u500b\u932f\u8aa4\u7684\u65b9\u6cd5\u76f8\u7576\u7c21\u55ae\u3002\u60a8\u53ea\u9700\u78ba\u4fdd\u5728 for-in \u8ff4\u5708\u4e2d\u6b63\u78ba\u4f7f\u7528 <code>in<\/code> \u95dc\u9375\u5b57\uff0c\u4ee5\u53ca\u53ef\u9078\u5730\u4f7f\u7528 <code>where<\/code> \u95dc\u9375\u5b57\u4f86\u7be9\u9078\u5143\u7d20\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u6b63\u78ba\u4f7f\u7528\u9019\u4e9b\u95dc\u9375\u5b57\uff1a<\/p>\n<pre class=\"brush: swift\">\nlet array = [5, 15, 25, 35]\nfor item in array where item > 10 {\n    print(\"\u7be9\u9078\u51fa\u7684\u5143\u7d20\uff1a\\(item)\")\n}\n<\/pre>\n<p>\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u8f38\u51fa\u5927\u65bc 10 \u7684\u5143\u7d20\uff0c\u5e6b\u52a9\u60a8\u6709\u6548\u8655\u7406\u9663\u5217\u4e2d\u7684\u6578\u64da\u3002<\/p>\n<h2>\u5ef6\u4f38\u61c9\u7528\uff1afor-in \u8ff4\u5708\u7684\u66f4\u591a\u7528\u9014<\/h2>\n<p>for-in \u8ff4\u5708\u4e0d\u50c5\u9650\u65bc\u9663\u5217\uff0c\u9084\u53ef\u4ee5\u7528\u65bc\u5176\u4ed6\u96c6\u5408\u985e\u578b\uff0c\u4f8b\u5982\u5b57\u5178\u548c\u96c6\u5408\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u5b57\u5178\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre class=\"brush: swift\">\nlet dictionary = [\"A\": 1, \"B\": 2, \"C\": 3]\nfor (key, value) in dictionary {\n    print(\"\\(key): \\(value)\")\n}\n<\/pre>\n<p>\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u5217\u5370\u51fa\u5b57\u5178\u4e2d\u7684\u6240\u6709\u9375\u503c\u5c0d\uff0c\u5c55\u793a\u4e86 for-in \u8ff4\u5708\u7684\u9748\u6d3b\u6027\u3002<\/p>\n<h2>\u932f\u8aa4\u6392\u9664\u5c0f\u8cbc\u58eb<\/h2>\n<ul>\n<li>\u6aa2\u67e5\u662f\u5426\u6b63\u78ba\u4f7f\u7528 <code>in<\/code> \u95dc\u9375\u5b57\u3002<\/li>\n<li>\u78ba\u4fdd\u4f7f\u7528\u6709\u6548\u7684\u96c6\u5408\u985e\u578b\u3002<\/li>\n<li>\u4f7f\u7528 Xcode \u7684\u5373\u6642\u932f\u8aa4\u6aa2\u67e5\u529f\u80fd\u4f86\u7372\u5f97\u5373\u6642\u53cd\u994b\u3002<\/li>\n<\/ul>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u4e86\u89e3\u4e26\u89e3\u6c7a\u300c<strong>Expected &#8216;in&#8217; in for-in statement<\/strong>\u300d\u932f\u8aa4\u5c0d\u65bc Swift \u7a0b\u5f0f\u8a2d\u8a08\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528\u6b63\u78ba\u7684\u8a9e\u6cd5\uff0c\u60a8\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u7de8\u5beb\u51fa\u9ad8\u6548\u4e14\u53ef\u8b80\u7684\u4ee3\u78bc\u3002\u5e0c\u671b\u672c\u6587\u5c0d\u60a8\u89e3\u6c7a\u9019\u4e00\u5e38\u898b\u554f\u984c\u6709\u6240\u5e6b\u52a9\uff01<\/p>\n<h2>Q&#038;A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n<h3>1. \u70ba\u4ec0\u9ebc\u6703\u51fa\u73fe\u300cExpected &#8216;in&#8217; in for-in statement\u300d\u932f\u8aa4\uff1f<\/h3>\n<p>\u9019\u662f\u56e0\u70ba\u5728 for-in \u8ff4\u5708\u4e2d\u7f3a\u5c11\u4e86 <code>in<\/code> \u95dc\u9375\u5b57\uff0c\u78ba\u4fdd\u5728\u4f7f\u7528\u6642\u5305\u542b\u6b64\u95dc\u9375\u5b57\u5373\u53ef\u3002<\/p>\n<h3>2. \u53ef\u4ee5\u5728 for-in \u8ff4\u5708\u4e2d\u4f7f\u7528\u5176\u4ed6\u689d\u4ef6\u55ce\uff1f<\/h3>\n<p>\u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 <code>where<\/code> \u95dc\u9375\u5b57\u4f86\u6dfb\u52a0\u689d\u4ef6\u7be9\u9078\uff0c\u4f8b\u5982\u7be9\u9078\u7279\u5b9a\u503c\u3002<\/p>\n<h3>3. \u9664\u4e86\u9663\u5217\uff0cfor-in \u8ff4\u5708\u9084\u53ef\u4ee5\u7528\u65bc\u54ea\u4e9b\u6578\u64da\u7d50\u69cb\uff1f<\/h3>\n<p>for-in \u8ff4\u5708\u53ef\u4ee5\u7528\u65bc\u5b57\u5178\u3001\u96c6\u5408\u7b49\u5176\u4ed6\u96c6\u5408\u985e\u578b\uff0c\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u904d\u6b77\u65b9\u5f0f\u3002<\/p>\n<p>&#8212;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39Swift\u4e2d\u7684For-In\u8a9e\u53e5\uff0c\u8a73\u7d30\u89e3\u91cb\u5176\u8a9e\u6cd5\u898f\u5247\uff0c\u4e26\u63d0\u4f9b\u793a\u4f8b\u4ee5\u4f9b\u53c3\u8003\u3002\u672c\u6587\u5c07\u5e6b\u52a9\u8b80\u8005\u4e86\u89e3\u5982\u4f55\u6b63\u78ba\u4f7f\u7528For-In\u8a9e\u53e5\uff0c\u4ee5\u907f\u514d\u51fa\u73fe\u201cExpected&#8217;in&#8217;infor-instatement\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-4265","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\/pcFK27-16N","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4265","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=4265"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4265\/revisions"}],"predecessor-version":[{"id":4266,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4265\/revisions\/4266"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4265"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}