{"id":3866,"date":"2025-06-01T11:03:12","date_gmt":"2025-06-05T03:41:12","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3866"},"modified":"2025-06-05T11:03:12","modified_gmt":"2025-06-05T03:41:12","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8swift%e4%b8%ad%e7%9a%84%e6%8e%a7%e5%88%b6%e6%b5%81","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8swift%e4%b8%ad%e7%9a%84%e6%8e%a7%e5%88%b6%e6%b5%81\/","title":{"rendered":"\u638c\u63e1 Swift \u63a7\u5236\u6d41\uff1a2025 \u5e74\u6700\u65b0\u6559\u5b78\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Swift, \u63a7\u5236\u6d41, if, guard, for, while, switch, Swift 5, iOS \u958b\u767c, \u7a0b\u5f0f\u8a2d\u8a08\"><\/p>\n<h1>\u638c\u63e1 Swift \u63a7\u5236\u6d41\uff1a2025 \u5e74\u6700\u65b0\u6559\u5b78\u8207\u6700\u4f73\u5be6\u8e10<\/h1>\n<p>Swift \u662f\u4e00\u7a2e\u975e\u5e38\u6d41\u884c\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u958b\u767c iOS\u3001macOS \u548c watchOS \u61c9\u7528\u7a0b\u5f0f\u3002\u63a7\u5236\u6d41\u662f\u7a0b\u5f0f\u8a2d\u8a08\u7684\u6838\u5fc3\u6982\u5ff5\u4e4b\u4e00\uff0c\u80fd\u5920\u6c7a\u5b9a\u7a0b\u5f0f\u7684\u57f7\u884c\u908f\u8f2f\u3002\u672c\u6587\u5c07\u6df1\u5165\u4ecb\u7d39 Swift \u4e2d\u7684\u63a7\u5236\u6d41\u7d50\u69cb\uff0c\u5305\u62ec if\u3001guard\u3001for\u3001while \u548c switch\uff0c\u4e26\u63d0\u4f9b\u5be6\u4f5c\u7bc4\u4f8b\u3001\u5e38\u898b\u932f\u8aa4\u6392\u9664\u53ca\u5ef6\u4f38\u61c9\u7528\u3002<\/p>\n<h2>1. if \u8a9e\u53e5<\/h2>\n<p>if \u8a9e\u53e5\u662f\u689d\u4ef6\u5224\u65b7\u7684\u4e00\u7a2e\u65b9\u5f0f\uff0c\u6839\u64da\u689d\u4ef6\u6210\u7acb\u8207\u5426\u57f7\u884c\u4e0d\u540c\u7684\u7a0b\u5f0f\u78bc\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 if \u8a9e\u53e5\u7684\u7bc4\u4f8b\uff1a<\/p>\n<p>&#8220;`swift<br \/>\nlet number = 15<br \/>\nif number > 10 {<br \/>\n    print(&#8220;Number is greater than 10&#8221;)<br \/>\n} else {<br \/>\n    print(&#8220;Number is not greater than 10&#8221;)<br \/>\n}<br \/>\n&#8220;`<\/p>\n<p>\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u5982\u679c number \u5927\u65bc 10\uff0c\u5c07\u986f\u793a\u300cNumber is greater than 10\u300d\uff0c\u5426\u5247\u986f\u793a\u300cNumber is not greater than 10\u300d\u3002<\/p>\n<h2>2. guard \u8a9e\u53e5<\/h2>\n<p>guard \u8a9e\u53e5\u7528\u65bc\u63d0\u524d\u6aa2\u67e5\u689d\u4ef6\uff0c\u82e5\u689d\u4ef6\u4e0d\u6210\u7acb\u5247\u57f7\u884c\u6307\u5b9a\u7684\u7a0b\u5f0f\u78bc\u4e26\u63d0\u524d\u9000\u51fa\u3002\u9019\u5c0d\u65bc\u4fdd\u8b49\u7a0b\u5f0f\u908f\u8f2f\u7684\u6e05\u6670\u6027\u975e\u5e38\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u7bc4\u4f8b\uff1a<\/p>\n<p>&#8220;`swift<br \/>\nlet number = 5<br \/>\nguard number > 10 else {<br \/>\n    print(&#8220;Number is not greater than 10&#8221;)<br \/>\n    return<br \/>\n}<br \/>\nprint(&#8220;Number is greater than 10&#8221;)<br \/>\n&#8220;`<\/p>\n<p>\u5728\u9019\u88e1\uff0c\u82e5 number \u4e0d\u5927\u65bc 10\uff0c\u5c07\u986f\u793a\u300cNumber is not greater than 10\u300d\uff0c\u4e26\u4e14\u7a0b\u5f0f\u6703\u63d0\u524d\u8fd4\u56de\u3002<\/p>\n<h2>3. for \u8a9e\u53e5<\/h2>\n<p>for \u8a9e\u53e5\u7528\u65bc\u8ff4\u5708\uff0c\u80fd\u5920\u91cd\u8907\u57f7\u884c\u6307\u5b9a\u7684\u7a0b\u5f0f\u78bc\u3002\u4ee5\u4e0b\u662f\u986f\u793a 1 \u5230 10 \u7684\u7bc4\u4f8b\uff1a<\/p>\n<p>&#8220;`swift<br \/>\nfor i in 1&#8230;10 {<br \/>\n    print(i)<br \/>\n}<br \/>\n&#8220;`<\/p>\n<p>\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u986f\u793a\u5f9e 1 \u5230 10 \u7684\u6578\u5b57\u3002<\/p>\n<h2>4. while \u8a9e\u53e5<\/h2>\n<p>while \u8a9e\u53e5\u4e5f\u662f\u4e00\u7a2e\u8ff4\u5708\uff0c\u6703\u6301\u7e8c\u57f7\u884c\u76f4\u5230\u689d\u4ef6\u4e0d\u6210\u7acb\u3002\u4f8b\u5982\uff1a<\/p>\n<p>&#8220;`swift<br \/>\nvar i = 1<br \/>\nwhile i <= 10 {\n    print(i)\n    i += 1\n}\n```\n\n\u9019\u88e1\u5c07\u91cd\u8907\u986f\u793a 1 \u5230 10 \u7684\u6578\u5b57\uff0c\u76f4\u5230 i \u8d85\u904e 10\u3002\n\n\n\n<h2>5. switch \u8a9e\u53e5<\/h2>\n<p>switch \u8a9e\u53e5\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u689d\u4ef6\u5224\u65b7\u5de5\u5177\uff0c\u80fd\u5920\u6839\u64da\u8b8a\u6578\u7684\u4e0d\u540c\u503c\u57f7\u884c\u4e0d\u540c\u7684\u7a0b\u5f0f\u78bc\u3002\u4f8b\u5982\uff1a<\/p>\n<p>&#8220;`swift<br \/>\nlet number = 8<br \/>\nswitch number {<br \/>\ncase 0:<br \/>\n    print(&#8220;Number is 0&#8221;)<br \/>\ncase 2, 4, 6, 8:<br \/>\n    print(&#8220;Number is even&#8221;)<br \/>\ndefault:<br \/>\n    print(&#8220;Number is odd&#8221;)<br \/>\n}<br \/>\n&#8220;`<\/p>\n<p>\u9019\u6bb5\u7a0b\u5f0f\u78bc\u5c07\u6aa2\u67e5 number \u662f\u5426\u70ba\u5076\u6578\uff0c\u82e5\u662f\u5247\u986f\u793a\u300cNumber is even\u300d\u3002<\/p>\n<h2>\u5e38\u898b\u932f\u8aa4\u6392\u9664<\/h2>\n<p>\u5728\u4f7f\u7528\u63a7\u5236\u6d41\u6642\uff0c\u4f60\u53ef\u80fd\u6703\u9047\u5230\u4ee5\u4e0b\u5e38\u898b\u932f\u8aa4\uff1a<\/p>\n<p>&#8211; **if \u8a9e\u53e5\u4e2d\u7684\u908f\u8f2f\u932f\u8aa4**\uff1a\u78ba\u4fdd\u689d\u4ef6\u5224\u65b7\u6b63\u78ba\uff0c\u4e26\u4f7f\u7528 else \u4f86\u8655\u7406\u5176\u4ed6\u60c5\u6cc1\u3002<br \/>\n&#8211; **guard \u8a9e\u53e5\u672a\u6b63\u78ba\u4f7f\u7528**\uff1a\u8a18\u5f97\u5728 guard \u8a9e\u53e5\u4e2d\u5fc5\u9808\u6709 else \u5340\u584a\u3002<br \/>\n&#8211; **switch \u8a9e\u53e5\u672a\u6db5\u84cb\u6240\u6709\u53ef\u80fd\u6027**\uff1a\u4f7f\u7528 default \u4f86\u8655\u7406\u672a\u9810\u671f\u7684\u60c5\u6cc1\u3002<\/p>\n<h2>\u5ef6\u4f38\u61c9\u7528<\/h2>\n<p>\u63a7\u5236\u6d41\u4e0d\u50c5\u9650\u65bc\u7c21\u55ae\u7684\u5224\u65b7\u548c\u8ff4\u5708\uff0c\u9084\u53ef\u4ee5\u7d50\u5408\u5176\u4ed6\u529f\u80fd\u5982\u51fd\u6578\u3001\u9589\u5305\u548c\u932f\u8aa4\u8655\u7406\uff0c\u4ee5\u5275\u5efa\u66f4\u8907\u96dc\u7684\u908f\u8f2f\u3002\u8003\u616e\u5c07\u63a7\u5236\u6d41\u7d50\u69cb\u8207 Swift \u7684\u5176\u4ed6\u7279\u6027\u7d50\u5408\u4f7f\u7528\uff0c\u4f86\u63d0\u5347\u7a0b\u5f0f\u7684\u53ef\u8b80\u6027\u548c\u7dad\u8b77\u6027\u3002<\/p>\n<p>\u7e3d\u7d50\u4f86\u8aaa\uff0cSwift \u4e2d\u7684\u63a7\u5236\u6d41\u7d50\u69cb\u2014if\u3001guard\u3001for\u3001while \u548c switch\u2014\u80fd\u5920\u9748\u6d3b\u5730\u63a7\u5236\u7a0b\u5f0f\u7684\u57f7\u884c\u6d41\u7a0b\u3002\u719f\u6089\u9019\u4e9b\u8a9e\u6cd5\u662f\u63d0\u5347 Swift \u7a0b\u5f0f\u8a2d\u8a08\u80fd\u529b\u7684\u95dc\u9375\u3002<\/p>\n<h2>Q&#038;A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n<p>**Q1: Swift \u4e2d\u7684\u63a7\u5236\u6d41\u6709\u54ea\u5e7e\u7a2e\u4e3b\u8981\u985e\u578b\uff1f**<br \/>\nA1: \u4e3b\u8981\u6709 if \u8a9e\u53e5\u3001guard \u8a9e\u53e5\u3001for \u8ff4\u5708\u3001while \u8ff4\u5708\u548c switch \u8a9e\u53e5\u3002<\/p>\n<p>**Q2: \u5728\u4f7f\u7528 guard \u8a9e\u53e5\u6642\uff0c\u70ba\u4f55\u9700\u8981 else \u5340\u584a\uff1f**<br \/>\nA2: guard \u8a9e\u53e5\u7684\u76ee\u7684\u662f\u5728\u689d\u4ef6\u4e0d\u6210\u7acb\u6642\u63d0\u524d\u9000\u51fa\u7a0b\u5f0f\uff0c\u56e0\u6b64\u5fc5\u9808\u63d0\u4f9b else \u5340\u584a\u4f86\u8655\u7406\u9019\u7a2e\u60c5\u6cc1\u3002<\/p>\n<p>**Q3: \u5982\u4f55\u9078\u64c7\u4f7f\u7528 if \u8a9e\u53e5\u9084\u662f switch \u8a9e\u53e5\uff1f**<br \/>\nA3: \u7576\u9700\u8981\u6aa2\u67e5\u591a\u500b\u689d\u4ef6\u6642\uff0cswitch \u8a9e\u53e5\u901a\u5e38\u66f4\u5177\u53ef\u8b80\u6027\uff1b\u800c\u7c21\u55ae\u7684\u689d\u4ef6\u5224\u65b7\u5247\u53ef\u4f7f\u7528 if \u8a9e\u53e5\u3002<br \/>\n&#8212;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39Swift\u4e2d\u7684\u63a7\u5236\u6d41\uff0c\u5305\u62ecif\u3001guard\u3001for\u3001while\u3001switch\u7b49\uff0c\u4e26\u63d0\u4f9b\u7c21\u55ae\u7684\u793a\u4f8b\u4f86\u89e3\u91cb\u6bcf\u500b\u63a7\u5236\u6d41\u7684\u529f\u80fd\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-3866","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\/pcFK27-10m","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3866","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=3866"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3866\/revisions"}],"predecessor-version":[{"id":3867,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3866\/revisions\/3867"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=3866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}