{"id":4085,"date":"2025-06-04T11:33:56","date_gmt":"2025-06-05T04:07:56","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4085"},"modified":"2025-06-05T11:33:56","modified_gmt":"2025-06-05T04:07:56","slug":"%e4%ba%86%e8%a7%a3swift%e4%b8%ad%e8%ae%8a%e6%95%b8x%e7%9a%84let%e5%b8%b8%e6%95%b8%e6%87%89%e7%94%a8","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e4%ba%86%e8%a7%a3swift%e4%b8%ad%e8%ae%8a%e6%95%b8x%e7%9a%84let%e5%b8%b8%e6%95%b8%e6%87%89%e7%94%a8\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Swift \u4e2d\u7684 let \u5e38\u6578\u61c9\u7528\uff1a\u89e3\u6c7a\u8b8a\u6578\u672a\u7a81\u8b8a\u7684\u932f\u8aa4\u63d0\u793a"},"content":{"rendered":"

<\/p>\n

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Swift \u662f\u4e00\u7a2e\u5f37\u5927\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc iOS \u548c macOS \u61c9\u7528\u7a0b\u5f0f\u7684\u958b\u767c\u3002\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u63d0\u793a\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u300c\u8b8a\u6578 X \u5f9e\u672a\u88ab\u7a81\u8b8a\uff1b\u8003\u616e\u6539\u70ba let \u5e38\u6578\u300d\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u5e36\u60a8\u6df1\u5165\u4e86\u89e3\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\uff0c\u4ee5\u53ca\u5982\u4f55\u6b63\u78ba\u4f7f\u7528 let \u5e38\u6578\u3002<\/p>\n

\u8b8a\u6578\u8207\u5e38\u6578\u7684\u5340\u5225<\/h2>\n

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\u932f\u8aa4\u63d0\u793a\u7684\u89e3\u6790<\/h2>\n

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

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\nfunc calculateSum(x: Int, y: Int) -> Int {\n    let sum = x + y \/\/ \u5c07 sum \u5b9a\u7fa9\u70ba\u5e38\u6578\uff0c\u56e0\u70ba\u4e0d\u6703\u6539\u8b8a\n    return sum\n}\n<\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0csum \u662f\u4e00\u500b\u53ea\u88ab\u8ce6\u503c\u4e00\u6b21\u7684\u5e38\u6578\uff0c\u56e0\u70ba\u5b83\u4e0d\u6703\u5728\u51fd\u5f0f\u5167\u90e8\u88ab\u6539\u8b8a\u3002\u9019\u6a23\u7684\u505a\u6cd5\u4e0d\u50c5\u7b26\u5408\u6700\u4f73\u5be6\u8e10\uff0c\u9084\u80fd\u8b93\u7a0b\u5f0f\u78bc\u66f4\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n
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    \n
  • \u78ba\u4fdd\u60a8\u672a\u4f7f\u7528 var \u5b9a\u7fa9\u8b8a\u6578\uff0c\u4e14\u8a72\u8b8a\u6578\u4e0d\u6703\u88ab\u4fee\u6539\u3002<\/li>\n
  • \u6aa2\u67e5\u60a8\u7684\u7a0b\u5f0f\u78bc\u908f\u8f2f\uff0c\u78ba\u4fdd\u6240\u6709\u7684\u8b8a\u6578\u90fd\u662f\u5fc5\u8981\u7684\u3002<\/li>\n
  • \u5982\u679c\u9700\u8981\uff0c\u5c07\u4e0d\u6703\u88ab\u4fee\u6539\u7684\u8b8a\u6578\u8f49\u63db\u70ba\u5e38\u6578\u3002<\/li>\n<\/ul>\n
    \u5ef6\u4f38\u61c9\u7528<\/h2>\n
    \u5728 Swift \u4e2d\uff0c\u9069\u7576\u4f7f\u7528\u5e38\u6578\u548c\u8b8a\u6578\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u6548\u7387\u8207\u53ef\u7dad\u8b77\u6027\u3002\u7576\u958b\u767c\u5927\u578b\u61c9\u7528\u7a0b\u5f0f\u6642\uff0c\u6b63\u78ba\u7ba1\u7406\u9019\u4e9b\u5143\u7d20\u80fd\u5920\u907f\u514d\u6f5b\u5728\u7684\u932f\u8aa4\uff0c\u4e26\u4f7f\u5f97\u7a0b\u5f0f\u78bc\u66f4\u52a0\u6e05\u6670\u3002<\/p>\n
    \u7e3d\u4e4b\uff0c\u7576\u60a8\u5728 Swift \u4e2d\u6536\u5230\u300c\u8b8a\u6578 X \u5f9e\u672a\u88ab\u7a81\u8b8a\uff1b\u8003\u616e\u6539\u70ba let \u5e38\u6578\u300d\u7684\u932f\u8aa4\u63d0\u793a\u6642\uff0c\u61c9\u8a72\u5c07\u8a72\u8b8a\u6578\u6539\u70ba\u5e38\u6578\uff0c\u4ee5\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n
    Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n
    1. \u70ba\u4ec0\u9ebc\u5728 Swift \u4e2d\u4f7f\u7528 let \u5e38\u6578\u66f4\u597d\uff1f<\/h3>\n
    \u4f7f\u7528 let \u5e38\u6578\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u5b89\u5168\u6027\u548c\u53ef\u8b80\u6027\uff0c\u907f\u514d\u610f\u5916\u4fee\u6539\u5e38\u6578\u7684\u503c\u3002<\/p>\n
    2. \u5982\u4f55\u77e5\u9053\u4f55\u6642\u4f7f\u7528 var \u6216 let\uff1f<\/h3>\n
    \u5982\u679c\u60a8\u9700\u8981\u6539\u8b8a\u67d0\u500b\u503c\uff0c\u4f7f\u7528 var\uff1b\u5982\u679c\u8a72\u503c\u4e0d\u6703\u6539\u8b8a\uff0c\u5247\u61c9\u4f7f\u7528 let\u3002<\/p>\n
    3. \u80fd\u5426\u5c07 let \u5e38\u6578\u7684\u503c\u5f8c\u7e8c\u6539\u8b8a\uff1f<\/h3>\n
    \u4e0d\u53ef\u4ee5\uff0clet \u5b9a\u7fa9\u7684\u5e38\u6578\u5728\u521d\u59cb\u5316\u5f8c\u7121\u6cd5\u518d\u6539\u8b8a\u5176\u503c\u3002<\/p>\n
    —<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39Swift\u4e2d\u8b8a\u6578X\u7684let\u5e38\u6578\u61c9\u7528\uff0c\u8b93\u958b\u767c\u8005\u66f4\u52a0\u4e86\u89e3Swift\u4e2d\u8b8a\u6578X\u7684\u4f7f\u7528\u65b9\u5f0f\uff0c\u4ee5\u53ca\u5982\u4f55\u907f\u514d\u51fa\u73fe\u932f\u8aa4\u89e3\u6790\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-4085","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\/pcFK27-13T","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4085","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=4085"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4085\/revisions"}],"predecessor-version":[{"id":4086,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4085\/revisions\/4086"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}