{"id":190884,"date":"2023-05-31T06:26:56","date_gmt":"2023-05-30T22:26:56","guid":{"rendered":"https:\/\/www.idc.net\/help\/190884\/"},"modified":"2023-05-31T06:26:56","modified_gmt":"2023-05-30T22:26:56","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91ios%e6%95%99%e7%a8%8b%ef%bc%9a%e9%85%8d%e7%bd%ae%e8%a7%86%e5%9b%be","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/190884\/","title":{"rendered":"\u540e\u6d6a\u4e91IOS\u6559\u7a0b\uff1a\u914d\u7f6e\u89c6\u56fe"},"content":{"rendered":"<h2> \u6982\u89c8 <\/h2>\n<p> \u5728 SwiftUI \u4e2d\uff0c\u4f60\u53ef\u4ee5\u5c06\u89c6\u56fe\u7ec4\u5408\u6210\u4e00\u4e2a\u5c42\u6b21\u7ed3\u6784\uff0c\u7528\u5b83\u6765\u63cf\u8ff0\u4f60\u7684 App \u7528\u6237\u754c\u9762\u3002<em>\u89c6\u56fe\u4fee\u9970\u7b26<\/em>\u80fd\u5e2e\u52a9\u4f60\u81ea\u5b9a App \u89c6\u56fe\u7684\u5916\u89c2\u548c\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4fee\u9970\u7b26\u6765\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a <\/p>\n<ul>\n<li>\n<p> \u4e3a\u89c6\u56fe\u6dfb\u52a0\u8f85\u52a9\u529f\u80fd\u3002 <\/p>\n<\/li>\n<li>\n<p> \u8c03\u6574\u89c6\u56fe\u7684\u6837\u5f0f\u3001\u5e03\u5c40\u548c\u5176\u4ed6\u5916\u89c2\u7279\u5f81\u3002 <\/p>\n<\/li>\n<li>\n<p> \u54cd\u5e94\u62f7\u8d1d\u548c\u7c98\u8d34\u7b49\u64cd\u4f5c\u3002 <\/p>\n<\/li>\n<li>\n<p> \u6709\u6761\u4ef6\u5730\u5448\u73b0\u6a21\u5f0f\u89c6\u56fe\uff0c\u4f8b\u5982\u5f39\u51fa\u7a97\u53e3\u3002 <\/p>\n<\/li>\n<li>\n<p> \u914d\u7f6e\u652f\u6301\u89c6\u56fe\uff0c\u4f8b\u5982\u5de5\u5177\u680f\u3002 <\/p>\n<\/li>\n<\/ul>\n<p> \u7531\u4e8e\u89c6\u56fe\u4fee\u9970\u7b26\u662f\u5e26\u6709 <code>View<\/code> (\u82f1\u6587) \u534f\u8bae\u63d0\u4f9b\u7684\u884c\u4e3a\u7684 Swift \u65b9\u6cd5\uff0c\u56e0\u6b64\uff0c\u4f60\u53ef\u4ee5\u5c06\u5b83\u4eec\u5e94\u7528\u4e8e\u9075\u4ece <code>View<\/code> (\u82f1\u6587) \u534f\u8bae\u7684\u4efb\u4f55\u7c7b\u578b\u3002\u8fd9\u5305\u62ec <code>Text<\/code> (\u82f1\u6587)\u3001<code>Image<\/code> (\u82f1\u6587) \u548c <code>Button<\/code> (\u82f1\u6587) \u7b49\u539f\u751f\u89c6\u56fe\u4ee5\u53ca\u4f60\u5b9a\u4e49\u7684\u89c6\u56fe\u3002 <\/p>\n<h3> \u901a\u8fc7\u4fee\u9970\u7b26\u914d\u7f6e\u89c6\u56fe <\/h3>\n<p> \u4e0e\u5176\u4ed6 Swift \u65b9\u6cd5\u4e00\u6837\uff0c\u4fee\u9970\u7b26\u5728\u5b9e\u4f8b\u4e0a\u8fd0\u884c (\u5728\u672c\u4f8b\u4e2d\u4e3a\u67d0\u79cd\u89c6\u56fe) \u5e76\u4e14\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u91c7\u7528\u8f93\u5165\u53c2\u6570\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u5e94\u7528 <code>foregroundColor(_:)<\/code> (\u82f1\u6587) \u4fee\u9970\u7b26\u6765\u8bbe\u7f6e <code>Text<\/code> (\u82f1\u6587) \u89c6\u56fe\u7684\u989c\u8272\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>Text<\/span>(<span>\"Hello, World!\"<\/span>)<\/span><\/span><span><span><\/span> <span> .foregroundColor(.red) <span>\/\/ Display red text.<\/span><\/span><\/span><\/code>\n<\/pre>\n<p> \u4fee\u9970\u7b26\u5c06\u8fd4\u56de\u4e00\u4e2a\u5305\u88c5\u4e86\u539f\u59cb\u89c6\u56fe\u7684\u89c6\u56fe\uff0c\u5e76\u5728\u89c6\u56fe\u5c42\u6b21\u7ed3\u6784\u4e2d\u66ff\u6362\u5b83\u3002\u4f60\u53ef\u4ee5\u5c06\u4e0a\u4f8b\u4e2d\u7684\u4e24\u884c\u4ee3\u7801\u60f3\u6210\u662f\u89e3\u6790\u4e3a\u663e\u793a\u7ea2\u8272\u6587\u672c\u7684\u5355\u4e00\u89c6\u56fe\u3002 <\/p>\n<\/p>\n<p> \u5c3d\u7ba1\u4e0a\u8ff0\u4ee3\u7801\u9075\u5faa Swift \u7684\u89c4\u5219\uff0c\u4f46\u521a\u521a\u63a5\u89e6 SwiftUI \u7684\u5f00\u53d1\u8005\u53ef\u80fd\u4e0d\u719f\u6089\u6b64\u4ee3\u7801\u7684\u7ed3\u6784\u3002SwiftUI \u4f7f\u7528\u58f0\u660e\u5f0f\u65b9\u6cd5\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u4f60\u5728\u4ee3\u7801\u4e2d\u58f0\u660e\u5e76\u914d\u7f6e\u89c6\u56fe\u7684\u4f4d\u7f6e\u4e0e\u89c6\u56fe\u5728\u89c6\u56fe\u5c42\u6b21\u7ed3\u6784\u4e2d\u7684\u4f4d\u7f6e\u5bf9\u5e94\u3002\u6709\u5173\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u201c\u58f0\u660e\u81ea\u5b9a\u89c6\u56fe\u201d\u3002 <\/p>\n<h3> \u94fe\u5f0f\u8c03\u7528\u4fee\u9970\u7b26\u4ee5\u5b9e\u73b0\u590d\u6742\u6548\u679c <\/h3>\n<p> \u4f60\u901a\u5e38\u901a\u8fc7\u4e00\u4e2a\u63a5\u4e00\u4e2a\u5730\u8c03\u7528\u4fee\u9970\u7b26\u6765\u4ee5\u94fe\u5f0f\u65b9\u5f0f\u8c03\u7528\u5b83\u4eec\uff0c\u5373\u6bcf\u4e2a\u4fee\u9970\u7b26\u90fd\u5305\u88c5\u4e86\u4e0a\u4e00\u4e2a\u4fee\u9970\u7b26\u7684\u7ed3\u679c\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>frame(width:height:alignment:)<\/code> (\u82f1\u6587) \u4fee\u9970\u7b26\u5c06\u6587\u672c\u89c6\u56fe\u5305\u88c5\u5728\u5177\u6709\u7ed9\u5b9a\u5bbd\u5ea6\u7684\u9690\u5f62\u6846\u4e2d\uff0c\u4ee5\u5f71\u54cd\u5176\u5e03\u5c40\uff0c\u7136\u540e\u4f7f\u7528 <code>border(_:width:)<\/code> (\u82f1\u6587) \u4fee\u9970\u7b26\u56f4\u7ed5\u8be5\u6846\u67b6\u7ed8\u5236\u4e00\u4e2a\u8f6e\u5ed3\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>Text<\/span>(<span>\"Title\"<\/span>)<\/span><\/span><span><span><\/span> <span> .frame(width: <span>100<\/span>)<\/span><\/span><span><span><\/span> <span> .border(<span>Color<\/span>.gray)<\/span><\/span><\/code>\n<\/pre>\n<p> \u4f60\u5e94\u7528\u4fee\u9970\u7b26\u7684\u987a\u5e8f\u5f88\u91cd\u8981\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801\u5f97\u51fa\u7684 border \u4f1a\u7ed8\u5236\u6846\u67b6\u5b8c\u6574\u5bbd\u5ea6\u7684\u8f6e\u5ed3\u3002 <\/p>\n<\/p>\n<p> \u5982\u679c\u5728 border \u4fee\u9970\u7b26\u4e4b\u540e\u6307\u5b9a frame \u4fee\u9970\u7b26\uff0c\u5219 SwiftUI \u4ec5\u4f1a\u5c06 border \u5e94\u7528\u4e8e\u6587\u672c\u89c6\u56fe\uff0c\u5360\u7528\u7684\u7a7a\u95f4\u7edd\u4e0d\u4f1a\u8d85\u8fc7\u6e32\u67d3\u5176\u5185\u5bb9\u6240\u9700\u7684\u7a7a\u95f4\u3002 <\/p>\n<pre><code><span><span><\/span> <span><span>Text<\/span>(<span>\"Title\"<\/span>)<\/span><\/span><span><span><\/span> <span> .border(<span>Color<\/span>.gray) <span>\/\/ Apply the border first this time.<\/span><\/span><\/span><span><span><\/span> <span> .frame(width: <span>100<\/span>)<\/span><\/span><\/code>\n<\/pre>\n<p> \u5c06\u8be5\u89c6\u56fe\u5305\u88c5\u5728\u4e00\u4e2a\u5177\u6709\u56fa\u5b9a 100 \u70b9\u5bbd\u5ea6\u7684\u9690\u5f62\u6846\u4e2d\u4f1a\u5f71\u54cd\u590d\u5408\u89c6\u56fe\u7684\u5e03\u5c40\uff0c\u4f46\u5bf9 border \u6ca1\u6709\u5f71\u54cd\u3002 <\/p>\n<\/p>\n<h3> \u914d\u7f6e\u5b50\u89c6\u56fe <\/h3>\n<p> \u4f60\u53ef\u4ee5\u5c06 <code>View<\/code> (\u82f1\u6587) \u534f\u8bae\u5b9a\u4e49\u7684\u4efb\u4f55\u89c6\u56fe\u4fee\u9970\u7b26\u5e94\u7528\u4e8e\u4efb\u4f55\u5177\u4f53\u7684\u89c6\u56fe\uff0c\u5373\u4f7f\u662f\u5728\u4fee\u9970\u7b26\u5bf9\u5176\u76ee\u6807\u89c6\u56fe\u6ca1\u6709\u76f4\u63a5\u5f71\u54cd\u7684\u60c5\u51b5\u4e0b\u4e5f\u662f\u5982\u6b64\u3002\u4fee\u9970\u7b26\u7684\u5f71\u54cd\u4f1a\u4f20\u64ad\u5230\u5e76\u672a\u663e\u5f0f\u8986\u76d6\u4fee\u9970\u7b26\u7684\u5b50\u89c6\u56fe\u3002 <\/p>\n<p> \u4f8b\u5982\uff0c<code>VStack<\/code> (\u82f1\u6587) \u5b9e\u4f8b\u672c\u8eab\u7684\u4f5c\u7528\u4ec5\u4ec5\u662f\u5782\u76f4\u5806\u53e0\u5176\u4ed6\u89c6\u56fe\uff0c\u5b83\u6ca1\u6709\u4efb\u4f55\u8981\u663e\u793a\u7684\u6587\u672c\u3002\u56e0\u6b64\uff0c\u5c06\u4e00\u4e2a <code>font(_:)<\/code> (\u82f1\u6587) \u4fee\u9970\u7b26\u5e94\u7528\u4e8e\u8be5 stack \u4e0d\u4f1a\u5bf9\u5b83\u4ea7\u751f\u4efb\u4f55\u5f71\u54cd\u3002\u7136\u800c\uff0cfont \u4fee\u9970\u7b26\u5374\u4f1a\u5e94\u7528\u4e8e\u8be5 stack \u7684\u6240\u6709\u5b50\u89c6\u56fe\uff0c\u5176\u4e2d\u7684\u90e8\u5206\u89c6\u56fe\u53ef\u80fd\u4f1a\u663e\u793a\u6587\u672c\u3002\u4e0d\u8fc7\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u5411\u7279\u5b9a\u5b50\u89c6\u56fe\u6dfb\u52a0\u53e6\u4e00\u4e2a\u4fee\u9970\u7b26\u6765\u5728\u672c\u5730\u8986\u76d6\u8be5\u5806\u53e0\u7684\u4fee\u9970\u7b26\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>VStack<\/span> {<\/span><\/span><span><span><\/span> <span> <span>Text<\/span>(<span>\"Title\"<\/span>)<\/span><\/span><span><span><\/span> <span> .font(.title) <span>\/\/ Override the font of this view.<\/span><\/span><\/span><span><span><\/span> <span> <span>Text<\/span>(<span>\"First body line.\"<\/span>)<\/span><\/span><span><span><\/span> <span> <span>Text<\/span>(<span>\"Second body line.\"<\/span>)<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><span><span><\/span> <span>.font(.body) <span>\/\/ Set a default font for text in the stack.<\/span><\/span><\/span><\/code>\n<\/pre>\n<\/p>\n<h3> \u4f7f\u7528\u7279\u5b9a\u4e8e\u89c6\u56fe\u7684\u4fee\u9970\u7b26 <\/h3>\n<p> \u5c3d\u7ba1\u8bb8\u591a\u89c6\u56fe\u7c7b\u578b\u4f9d\u8d56\u4e8e\u6807\u51c6\u89c6\u56fe\u4fee\u9970\u7b26\u6765\u8fdb\u884c\u81ea\u5b9a\u548c\u63a7\u5236\uff0c\u4f46\u67d0\u4e9b\u89c6\u56fe\u53ef\u4ee5\u5b9a\u4e49\u7279\u5b9a\u4e8e\u8be5\u89c6\u56fe\u7c7b\u578b\u7684\u4fee\u9970\u7b26\u3002\u6b64\u7c7b\u4fee\u9970\u7b26\u4ec5\u9002\u7528\u4e8e\u76f8\u5e94\u7c7b\u578b\u7684\u89c6\u56fe\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>Text<\/code> (\u82f1\u6587) \u5b9a\u4e49\u7684 <code>bold()<\/code> (\u82f1\u6587) \u4fee\u9970\u7b26\uff0c\u6765\u65b9\u4fbf\u5730\u5411\u89c6\u56fe\u7684\u6587\u672c\u6dfb\u52a0\u7c97\u4f53\u6548\u679c\u3002\u5c3d\u7ba1\u4f60\u53ef\u4ee5\u5728\u4efb\u4f55\u89c6\u56fe\u4e0a\u4f7f\u7528 <code>font(_:)<\/code> (\u82f1\u6587)\uff0c\u56e0\u4e3a\u5b83\u662f <code>View<\/code> (\u82f1\u6587) \u534f\u8bae\u7684\u4e00\u90e8\u5206\uff0c\u4f46\u4f60\u4ec5\u80fd\u5728 <code>Text<\/code> (\u82f1\u6587) \u89c6\u56fe\u4e0a\u4f7f\u7528 <code>bold()<\/code> (\u82f1\u6587)\u3002\u56e0\u6b64\uff0c\u4f60\u5e76\u4e0d\u80fd\u5728\u5bb9\u5668\u89c6\u56fe\u4e0a\u4f7f\u7528 bold \u4fee\u9970\u7b26\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>VStack<\/span> {<\/span><\/span><span><span><\/span> <span> <span>Text<\/span>(<span>\"Hello, world!\"<\/span>)<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><span><span><\/span> <span>.bold() <span>\/\/ Fails because 'VStack' doesn't have a 'bold' modifier.<\/span><\/span><\/span><\/code>\n<\/pre>\n<p> \u6b64\u5916\uff0c\u5728\u5e94\u7528\u53e6\u4e00\u4e2a\u901a\u7528\u4fee\u9970\u7b26\u540e\uff0c\u4f60\u4e5f\u4e0d\u80fd\u5728 <code>Text<\/code> (\u82f1\u6587) \u89c6\u56fe\u4e0a\u4f7f\u7528\u5b83\uff0c\u56e0\u4e3a\u901a\u7528\u4fee\u9970\u7b26\u4f1a\u8fd4\u56de\u4e00\u4e2a opaque type (\u82f1\u6587)\u3002\u4f8b\u5982\uff0cpadding \u4fee\u9970\u7b26\u7684\u8fd4\u56de\u503c\u4e0d\u662f <code>Text<\/code> (\u82f1\u6587)\uff0c\u800c\u662f\u4e00\u4e2a\u65e0\u6cd5\u91c7\u7528 bold \u4fee\u9970\u7b26\u7684\u4e0d\u900f\u660e\u7684\u7ed3\u679c\u7c7b\u578b\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>Text<\/span>(<span>\"Hello, world!\"<\/span>)<\/span><\/span><span><span><\/span> <span> .padding()<\/span><\/span><span><span><\/span> <span> .bold() <span>\/\/ Fails because 'some View' doesn't have a 'bold' modifier.<\/span><\/span><\/span><\/code>\n<\/pre>\n<p> \u6b63\u786e\u7684\u505a\u6cd5\u662f\u5c06 bold \u4fee\u9970\u7b26\u76f4\u63a5\u5e94\u7528\u4e8e <code>Text<\/code> (\u82f1\u6587) \u89c6\u56fe\uff0c\u7136\u540e\u6dfb\u52a0 padding\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>Text<\/span>(<span>\"Hello, world!\"<\/span>)<\/span><\/span><span><span><\/span> <span> .bold() <span>\/\/ Succeeds.<\/span><\/span><\/span><span><span><\/span> <span> .padding()<\/span><\/span><\/code>\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u89c8 \u5728 SwiftUI \u4e2d\uff0c\u4f60\u53ef\u4ee5\u5c06\u89c6\u56fe\u7ec4\u5408\u6210\u4e00\u4e2a\u5c42\u6b21\u7ed3\u6784\uff0c\u7528\u5b83\u6765\u63cf\u8ff0\u4f60\u7684 App \u7528\u6237\u754c\u9762\u3002\u89c6\u56fe\u4fee\u9970\u7b26\u80fd\u5e2e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":190885,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[189686],"tags":[],"class_list":["post-190884","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ios"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/190884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=190884"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/190884\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/190885"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=190884"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=190884"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=190884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}