{"id":190875,"date":"2022-11-03T07:47:55","date_gmt":"2022-11-02T23:47:55","guid":{"rendered":"https:\/\/www.idc.net\/help\/190875\/"},"modified":"2022-11-03T07:47:55","modified_gmt":"2022-11-02T23:47:55","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91ios%e6%95%99%e7%a8%8b%ef%bc%9a%e5%9c%a8%e4%bd%a0%e7%9a%84-app-%e4%b8%ad%e7%ae%a1%e7%90%86%e6%a8%a1%e5%9e%8b%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/190875\/","title":{"rendered":"\u540e\u6d6a\u4e91IOS\u6559\u7a0b\uff1a\u5728\u4f60\u7684 App \u4e2d\u7ba1\u7406\u6a21\u578b\u6570\u636e"},"content":{"rendered":"<h2> \u6982\u89c8 <\/h2>\n<p> \u4f60\u901a\u5e38\u4f1a\u5728\u4f60\u7684 App \u4e2d\uff0c\u4f7f\u7528\u4e0e\u7528\u6237\u754c\u9762\u548c\u5176\u4ed6\u903b\u8f91\u5206\u79bb\u7684\u6570\u636e\u6a21\u578b\u6765\u5b58\u50a8\u548c\u5904\u7406\u6570\u636e\u3002\u8fd9\u79cd\u5206\u79bb\u53ef\u4fc3\u8fdb\u6a21\u5757\u5316\u3001\u63d0\u5347\u53ef\u6d4b\u8bd5\u6027\uff0c\u5e76\u66f4\u52a0\u4fbf\u4e8e\u63a8\u65ad\u4f60\u7684 App \u7684\u8fd0\u884c\u65b9\u5f0f\u3002 <\/p>\n<p> \u6b64\u524d\uff0c\u4f60\u4f7f\u7528\u4e00\u4e2a\u89c6\u56fe\u63a7\u5236\u5668\u5728\u6a21\u578b\u548c\u7528\u6237\u754c\u9762\u4e4b\u95f4\u6765\u56de\u79fb\u52a8\u6570\u636e\uff0c\u800c\u6b64\u540c\u6b65\u8fc7\u7a0b\u7684\u5927\u90e8\u5206\u5de5\u4f5c\u90fd\u53ef\u7531 SwiftUI \u4e3a\u4f60\u5904\u7406\u3002\u82e5\u8981\u5728\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6\u66f4\u65b0\u89c6\u56fe\uff0c\u4f60\u9700\u8981\u4f7f\u4f60\u7684\u6570\u636e\u6a21\u578b\u7c7b\u6210\u4e3a\u53ef\u89c2\u5bdf\u5bf9\u8c61\u3001\u53d1\u5e03\u5b83\u4eec\u7684\u5c5e\u6027\u5e76\u4f7f\u7528\u7279\u6b8a\u5c5e\u6027\u58f0\u660e\u5b83\u4eec\u7684\u5b9e\u4f8b\u3002\u4e3a\u786e\u4fdd\u7528\u6237\u9a71\u52a8\u7684\u6570\u636e\u66f4\u6539\u56de\u6d41\u5230\u6a21\u578b\u4e2d\uff0c\u4f60\u9700\u8981\u5c06\u7528\u6237\u754c\u9762\u63a7\u4ef6\u4e0e\u6a21\u578b\u5c5e\u6027\u8fdb\u884c\u7ed1\u5b9a\u3002\u8fd9\u4e9b\u529f\u80fd\u4e00\u8d77\u5e2e\u52a9\u4f60\u7ef4\u62a4\u6570\u636e\u7684\u5355\u4e00\u6765\u6e90\u3002 <\/p>\n<h3> \u5c06\u6a21\u578b\u6570\u636e\u8bbe\u4e3a\u53ef\u89c2\u5bdf <\/h3>\n<p> \u8981\u8ba9\u6a21\u578b\u4e2d\u7684\u6570\u636e\u53d8\u5316\u5bf9 SwiftUI \u53ef\u89c1\uff0c\u8bf7\u4e3a\u6a21\u578b\u7c7b\u91c7\u7528 <code>ObservableObject<\/code> (\u82f1\u6587) \u534f\u8bae\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a <code>Book<\/code> \u7c7b\u4f5c\u4e3a\u53ef\u89c2\u5bdf\u5bf9\u8c61\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>class<\/span> <span>Book<\/span>: <span>ObservableObject<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u7cfb\u7edf\u4f1a\u81ea\u52a8\u63a8\u65ad\u8be5\u7c7b\u7684 <code>ObjectWillChangePublisher<\/code> (\u82f1\u6587) \u5173\u8054\u7c7b\u578b\uff0c\u5e76\u5408\u6210\u5fc5\u9700\u7684 <code>objectWillChange<\/code> (\u82f1\u6587) \u65b9\u6cd5\u6765\u53d1\u51fa\u5df2\u53d1\u5e03\u5c5e\u6027\u7684\u66f4\u6539\u503c\u3002\u82e5\u8981\u53d1\u5e03\u5c5e\u6027\uff0c\u8bf7\u5c06 <code>Published<\/code> (\u82f1\u6587) \u5c5e\u6027\u6dfb\u52a0\u5230\u5c5e\u6027\u7684\u58f0\u660e\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>class<\/span> <span>Book<\/span>: <span>ObservableObject<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>Published<\/span> <span>var<\/span> title = <span>\"Great Expectations\"<\/span><\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u8bf7\u907f\u514d\u5df2\u53d1\u5e03\u5c5e\u6027\u7684\u4e0d\u5fc5\u8981\u5f00\u9500\u3002\u4ec5\u53d1\u5e03\u65e2\u80fd\u66f4\u6539\u53c8\u5bf9\u7528\u6237\u754c\u9762\u5f88\u91cd\u8981\u7684\u5c5e\u6027\u3002\u4f8b\u5982\uff0c<code>Book<\/code> \u7c7b\u53ef\u80fd\u6709\u4e00\u4e2a\u5728\u521d\u59cb\u5316\u540e\u4ece\u4e0d\u66f4\u6539\u7684 <code>identifier<\/code> \u5c5e\u6027\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>class<\/span> <span>Book<\/span>: <span>ObservableObject<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>Published<\/span> <span>var<\/span> title = <span>\"Great Expectations\"<\/span><\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>let<\/span> identifier = <span>UUID<\/span>() <span>\/\/ A unique identifier that never changes.<\/span><\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u4f60\u4ecd\u53ef\u4ee5\u5728\u7528\u6237\u754c\u9762\u4e2d\u663e\u793a\u8be5\u6807\u8bc6\u7b26\uff0c\u4f46\u7531\u4e8e\u5b83\u672a\u53d1\u5e03\uff0cSwiftUI \u77e5\u9053\u4e0d\u5fc5\u89c2\u5bdf\u8be5\u7279\u5b9a\u6570\u636e\u7684\u53d8\u5316\u60c5\u51b5\u3002 <\/p>\n<h3> \u76d1\u6d4b\u53ef\u89c2\u5bdf\u5bf9\u8c61\u7684\u53d8\u5316 <\/h3>\n<p> \u82e5\u8981\u6307\u793a SwiftUI \u76d1\u6d4b\u53ef\u89c2\u5bdf\u5bf9\u8c61\uff0c\u8bf7\u5c06 <code>ObservedObject<\/code> (\u82f1\u6587) \u5c5e\u6027\u6dfb\u52a0\u5230\u5c5e\u6027\u7684\u58f0\u660e\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>struct<\/span> <span>BookView<\/span>: <span>View<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>ObservedObject<\/span> <span>var<\/span> book: <span>Book<\/span><\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>var<\/span> body: <span>some<\/span> <span>View<\/span> {<\/span><\/span><span><span><\/span> <span> <span>Text<\/span>(book.title)<\/span><\/span><span><span><\/span> <span> }<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u4f60\u53ef\u4ee5\u5c06\u6240\u89c2\u5bdf\u5bf9\u8c61\u7684\u5404\u4e2a\u5c5e\u6027\u4f20\u9012\u5230\u5b50\u89c6\u56fe\uff0c\u5982\u4e0a\u6240\u793a\u3002\u5f53\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u4f8b\u5982\uff0c\u5f53\u4f60\u4ece\u78c1\u76d8\u8f7d\u5165\u65b0\u6570\u636e\u65f6\uff0cSwiftUI \u4f1a\u66f4\u65b0\u6240\u6709\u53d7\u5f71\u54cd\u7684\u89c6\u56fe\u3002\u4f60\u8fd8\u53ef\u4ee5\u5c06\u6574\u4e2a\u53ef\u89c2\u5bdf\u5bf9\u8c61\u4f20\u9012\u5230\u5b50\u89c6\u56fe\uff0c\u5e76\u5728\u89c6\u56fe\u5c42\u6b21\u7ed3\u6784\u7684\u5404\u4e2a\u5c42\u7ea7\u4e4b\u95f4\u5171\u4eab\u6a21\u578b\u5bf9\u8c61\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>struct<\/span> <span>BookView<\/span>: <span>View<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>ObservedObject<\/span> <span>var<\/span> book: <span>Book<\/span><\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>var<\/span> body: <span>some<\/span> <span>View<\/span> {<\/span><\/span><span><span><\/span> <span> <span>BookEditView<\/span>(book: book)<\/span><\/span><span><span><\/span> <span> }<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span><span><span>struct<\/span> <span>BookEditView<\/span>: <span>View<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>ObservedObject<\/span> <span>var<\/span> book: <span>Book<\/span><\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>\/\/ ...<\/span><\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<h3> \u5b9e\u4f8b\u5316\u89c6\u56fe\u4e2d\u7684\u6a21\u578b\u5bf9\u8c61 <\/h3>\n<p> SwiftUI \u53ef\u80fd\u4f1a\u968f\u65f6\u521b\u5efa\u6216\u91cd\u65b0\u521b\u5efa\u4e00\u4e2a\u89c6\u56fe\uff0c\u56e0\u6b64\u5f88\u91cd\u8981\u7684\u4e00\u70b9\u662f\uff1a\u7528\u7ed9\u5b9a\u7684\u4e00\u7ec4\u8f93\u5165\u6765\u521d\u59cb\u5316\u89c6\u56fe\u65f6\uff0c\u8981\u80fd\u591f\u59cb\u7ec8\u4ea7\u751f\u76f8\u540c\u7684\u89c6\u56fe\u3002\u56e0\u6b64\uff0c\u5728\u89c6\u56fe\u4e2d\u521b\u5efa\u88ab\u89c2\u5bdf\u5bf9\u8c61\u4e0d\u662f\u5f88\u5b89\u5168\u7684\u505a\u6cd5\u3002\u4f60\u5e94\u501f\u52a9 SwiftUI \u63d0\u4f9b\u7684 <code>StateObject<\/code> (\u82f1\u6587) \u5c5e\u6027\u6765\u5b9e\u73b0\u8fd9\u4e00\u7528\u9014\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5728\u89c6\u56fe\u4e2d\u5b89\u5168\u5730\u521b\u5efa\u4e00\u4e2a <code>Book<\/code> \u5b9e\u4f8b\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>struct<\/span> <span>LibraryView<\/span>: <span>View<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>StateObject<\/span> <span>var<\/span> book = <span>Book<\/span>()<\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>var<\/span> body: <span>some<\/span> <span>View<\/span> {<\/span><\/span><span><span><\/span> <span> <span>BookView<\/span>(book: book)<\/span><\/span><span><span><\/span> <span> }<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u72b6\u6001\u5bf9\u8c61\u7684\u884c\u4e3a\u5c31\u50cf\u88ab\u89c2\u5bdf\u5bf9\u8c61\u4e00\u6837\uff0c\u552f\u4e00\u4e0d\u540c\u7684\u662f\uff0c\u65e0\u8bba SwiftUI \u91cd\u65b0\u521b\u5efa\u4e86\u4e00\u4e2a\u89c6\u56fe\u591a\u5c11\u6b21\uff0c\u5b83\u90fd\u80fd\u591f\u521b\u5efa\u5e76\u7ba1\u7406\u7ed9\u5b9a\u89c6\u56fe\u5b9e\u4f8b\u7684\u5355\u4e00\u5bf9\u8c61\u5b9e\u4f8b\u3002\u4f60\u53ef\u4ee5\u5728\u672c\u5730\u4f7f\u7528\u8be5\u5bf9\u8c61\uff0c\u6216\u5c06\u72b6\u6001\u5bf9\u8c61\u4f20\u9012\u5230\u53e6\u4e00\u4e2a\u89c6\u56fe\u7684\u88ab\u89c2\u5bdf\u5bf9\u8c61\u5c5e\u6027\uff0c\u5982\u4e0a\u8ff0\u793a\u4f8b\u6240\u793a\u3002 <\/p>\n<p> \u5c3d\u7ba1 SwiftUI \u4e0d\u4f1a\u5728\u89c6\u56fe\u4e2d\u91cd\u65b0\u521b\u5efa\u72b6\u6001\u5bf9\u8c61\uff0c\u4f46\u5b83\u5374\u4f1a\u4e3a\u6bcf\u4e2a\u89c6\u56fe\u5b9e\u4f8b\u521b\u5efa\u4e00\u4e2a\u4e0d\u540c\u7684\u5bf9\u8c61\u5b9e\u4f8b\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u4e2d\u7684\u6bcf\u4e2a <code>LibraryView<\/code> \u90fd\u5c06\u83b7\u5f97\u4e00\u4e2a\u552f\u4e00\u7684 <code>Book<\/code> \u5b9e\u4f8b\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>VStack<\/span> {<\/span><\/span><span><span><\/span> <span> <span>LibraryView<\/span>()<\/span><\/span><span><span><\/span> <span> <span>LibraryView<\/span>()<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u4f60\u8fd8\u53ef\u4ee5\u5728\u9876\u5c42 <code>App<\/code> (\u82f1\u6587) \u5b9e\u4f8b\u6216\u4f60 App \u7684\u4e00\u4e2a <code>Scene<\/code> (\u82f1\u6587) \u5b9e\u4f8b\u4e2d\u521b\u5efa\u4e00\u4e2a\u72b6\u6001\u5bf9\u8c61\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u4e3a\u4e00\u4e2a\u56fe\u4e66\u9605\u8bfb\u5668 App \u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3a <code>Library<\/code> \u7684\u53ef\u89c2\u5bdf\u5bf9\u8c61\u6765\u4fdd\u7559\u4e00\u7cfb\u5217\u56fe\u4e66\uff0c\u4f60\u53ef\u4ee5\u5728\u8be5 App \u7684\u9876\u5c42\u7ed3\u6784\u4e2d\u521b\u5efa\u4e00\u4e2a\u8d44\u6599\u5e93\u5b9e\u4f8b\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>@main<\/span><\/span><\/span><span><span><\/span> <span><span><span>struct<\/span> <span>BookReader<\/span>: <span>App<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>StateObject<\/span> <span>var<\/span> library = <span>Library<\/span>()<\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>\/\/ ...<\/span><\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<h3> \u5728\u6574\u4e2a App \u4e2d\u5171\u4eab\u5bf9\u8c61 <\/h3>\n<p> \u5982\u679c\u4f60\u6709\u4e00\u4e2a\u60f3\u5728\u6574\u4e2a App \u4e2d\u4f7f\u7528\u7684\u6570\u636e\u6a21\u578b\u5bf9\u8c61\uff0c\u4f46\u662f\uff0c\u4f60\u4e0d\u60f3\u5c06\u5b83\u4f20\u9012\u5230\u5c42\u6b21\u7ed3\u6784\u7684\u591a\u4e2a\u5c42\u7ea7\uff0c\u4f60\u53ef\u4ee5\u6539\u7528 <code>environmentObject(_:)<\/code> (\u82f1\u6587) \u89c6\u56fe\u4fee\u9970\u7b26\uff0c\u5c06\u8be5\u5bf9\u8c61\u653e\u7f6e\u5728\u73af\u5883\u4e2d\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span>@main<\/span><\/span><\/span><span><span><\/span> <span><span><span>struct<\/span> <span>BookReader<\/span>: <span>App<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>StateObject<\/span> <span>var<\/span> library = <span>Library<\/span>()<\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>var<\/span> body: <span>some<\/span> <span>Scene<\/span> {<\/span><\/span><span><span><\/span> <span> <span>WindowGroup<\/span> {<\/span><\/span><span><span><\/span> <span> <span>LibraryView<\/span>()<\/span><\/span><span><span><\/span> <span> .environmentObject(library)<\/span><\/span><span><span><\/span> <span> }<\/span><\/span><span><span><\/span> <span> }<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u7136\u540e\uff0c\u5e94\u7528\u4e86\u8be5\u4fee\u9970\u7b26\u7684\u89c6\u56fe\u7684\u4efb\u4f55\u5b50\u4ee3\u89c6\u56fe\u5747\u53ef\u901a\u8fc7\u4f7f\u7528 <code>EnvironmentObject<\/code> (\u82f1\u6587) \u5c5e\u6027\u58f0\u660e\u4e00\u4e2a\u5c5e\u6027\u6765\u8bbf\u95ee\u8be5\u6570\u636e\u6a21\u578b\u5b9e\u4f8b\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>struct<\/span> <span>LibraryView<\/span>: <span>View<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>EnvironmentObject<\/span> <span>var<\/span> library: <span>Library<\/span><\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>\/\/ ...<\/span><\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u5982\u679c\u4f60\u4f7f\u7528\u73af\u5883\u5bf9\u8c61\uff0c\u53ef\u4ee5\u5c06\u5b83\u6dfb\u52a0\u5230 App \u5c42\u6b21\u7ed3\u6784\u9876\u90e8\u7684\u89c6\u56fe\uff0c\u5982\u4e0a\u6240\u793a\u3002\u6216\u8005\uff0c\u4f60\u53ef\u4ee5\u5c06\u5b83\u6dfb\u52a0\u5230\u89c6\u56fe\u5c42\u6b21\u7ed3\u6784\u4e2d\u67d0\u4e2a\u5b50\u6811\u7684\u6839\u89c6\u56fe\u3002\u65e0\u8bba\u91c7\u7528\u54ea\u79cd\u65b9\u5f0f\uff0c\u90fd\u8fd8\u8981\u8bb0\u5f97\u5c06\u5176\u6dfb\u52a0\u5230\u4f7f\u7528\u6b64\u5bf9\u8c61\u6216\u5b50\u4ee3\u4f7f\u7528\u6b64\u5bf9\u8c61\u7684\u4efb\u4f55\u89c6\u56fe\u7684\u9884\u89c8\u63d0\u4f9b\u7a0b\u5e8f\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>struct<\/span> <span>LibraryView_Previews<\/span>: <span>PreviewProvider<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> <span>static<\/span> <span>var<\/span> previews: <span>some<\/span> <span>View<\/span> {<\/span><\/span><span><span><\/span> <span> <span>LibraryView<\/span>()<\/span><\/span><span><span><\/span> <span> .environmentObject(<span>Library<\/span>())<\/span><\/span><span><span><\/span> <span> }<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<h3> \u4f7f\u7528\u7ed1\u5b9a\u521b\u5efa\u53cc\u5411\u8fde\u63a5 <\/h3>\n<p> \u5982\u679c\u4f60\u5141\u8bb8\u7528\u6237\u5728\u7528\u6237\u754c\u9762\u4e2d\u66f4\u6539\u6570\u636e\uff0c\u8bf7\u4f7f\u7528\u4e0e\u76f8\u5e94\u5c5e\u6027\u7684\u7ed1\u5b9a\u3002\u8fd9\u786e\u4fdd\u66f4\u65b0\u4f1a\u81ea\u52a8\u56de\u6d41\u5230\u6570\u636e\u6a21\u578b\u4e2d\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u7ed9\u5bf9\u8c61\u7684\u540d\u79f0\u6dfb\u52a0\u7f8e\u5143\u7b26\u53f7 (<code>$<\/code>) \u524d\u7f00\uff0c\u83b7\u5f97\u4e0e\u88ab\u89c2\u5bdf\u5bf9\u8c61\u3001\u72b6\u6001\u5bf9\u8c61\u6216\u73af\u5883\u5bf9\u8c61\u5c5e\u6027\u7684\u7ed1\u5b9a\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u8ba9\u7528\u6237\u901a\u8fc7\u5411 <code>BookEditView<\/code> \u6dfb\u52a0\u4e00\u4e2a <code>TextField<\/code> (\u82f1\u6587) \u6765\u7f16\u8f91\u67d0\u56fe\u4e66\u7684\u4e66\u540d\uff0c\u5e94\u4e3a\u6587\u672c\u680f\u63d0\u4f9b\u4e0e\u8be5\u56fe\u4e66\u7684 <code>title<\/code> \u5c5e\u6027\u7684\u7ed1\u5b9a\uff1a <\/p>\n<pre><code><span><span><\/span> <span><span><span>struct<\/span> <span>BookEditView<\/span>: <span>View<\/span> <\/span>{<\/span><\/span><span><span><\/span> <span> @<span>ObservedObject<\/span> <span>var<\/span> book: <span>Book<\/span><\/span><\/span><span><span><\/span> <span> <\/span><\/span><span><span><\/span> <span> <span>var<\/span> body: <span>some<\/span> <span>View<\/span> {<\/span><\/span><span><span><\/span> <span> <span>TextField<\/span>(<span>\"Title\"<\/span>, text: $book.title)<\/span><\/span><span><span><\/span> <span> }<\/span><\/span><span><span><\/span> <span>}<\/span><\/span><\/code>\n<\/pre>\n<p> \u8be5\u7ed1\u5b9a\u5c06\u89c6\u56fe\u5143\u7d20\u4e0e\u5e95\u5c42\u6a21\u578b\u8fdb\u884c\u5173\u8054\uff0c\u4ee5\u4fbf\u7528\u6237\u53ef\u76f4\u63a5\u66f4\u6539\u6a21\u578b\u6570\u636e\u3002 <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u89c8 \u4f60\u901a\u5e38\u4f1a\u5728\u4f60\u7684 App \u4e2d\uff0c\u4f7f\u7528\u4e0e\u7528\u6237\u754c\u9762\u548c\u5176\u4ed6\u903b\u8f91\u5206\u79bb\u7684\u6570\u636e\u6a21\u578b\u6765\u5b58\u50a8\u548c\u5904\u7406\u6570\u636e\u3002\u8fd9\u79cd\u5206\u79bb\u53ef\u4fc3\u8fdb\u6a21\u5757\u5316 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[189686],"tags":[],"class_list":["post-190875","post","type-post","status-publish","format-standard","hentry","category-ios"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/190875","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=190875"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/190875\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=190875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=190875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=190875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}