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SwiftPamphletApp/Resource/Guide/SwiftUI/布局组件/Navigation导航/NavigationPath(ap).md
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| ## 使用说明 |
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SwiftPamphletApp/Resource/Guide/SwiftUI/布局组件/Navigation导航/NavigationStack(ap).md
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| ## 使用示例 | ||
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| 假设我们有一个 TVShow 结构体和一个 Book 结构体，它们分别包含电视剧和书籍的名字。当用户点击一个电视剧或书籍的名字时，他们会被导航到相应的详细信息页面。 | ||
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| 以下是一个例子： | ||
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| ```swift | ||
| struct TVShow: Hashable { | ||
| let name: String | ||
| } | ||
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| struct Book: Hashable { | ||
| let name: String | ||
| } | ||
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| struct ContentView: View { | ||
| @State var tvShows = [TVShow(name: "Game of Thrones"), TVShow(name: "Breaking Bad")] | ||
| @State var books = [Book(name: "1984"), Book(name: "To Kill a Mockingbird")] | ||
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| var body: some View { | ||
| NavigationStack { | ||
| List { | ||
| Section(header: Text("Best TV Shows")) { | ||
| ForEach(tvShows, id: \.name) { show in | ||
| NavigationLink(value: show, label: { | ||
| Text(show.name) | ||
| }) | ||
| } | ||
| } | ||
| Section(header: Text("Books")) { | ||
| ForEach(books, id: \.name) { book in | ||
| NavigationLink(value: book, label: { | ||
| Text(book.name) | ||
| }) | ||
| } | ||
| } | ||
| } | ||
| .navigationDestination(for: TVShow.self) { show in | ||
| TVShowView(show: show) | ||
| } | ||
| .navigationDestination(for: Book.self) { book in | ||
| BookView(book: book) | ||
| } | ||
| .navigationTitle(Text("Media")) | ||
| } | ||
| } | ||
| } | ||
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| struct TVShowView: View { | ||
| let show: TVShow | ||
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| var body: some View { | ||
| Text("Details for \(show.name)") | ||
| } | ||
| } | ||
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| struct BookView: View { | ||
| let book: Book | ||
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| var body: some View { | ||
| Text("Details for \(book.name)") | ||
| } | ||
| } | ||
| ``` | ||
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| ## 全局路由 | ||
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| 先写个路由的枚举 | ||
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| ```swift | ||
| enum Route: Hashable { | ||
| case all | ||
| case add(Book) | ||
| case detail(Book) | ||
| } | ||
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| struct Book { | ||
| let name: String | ||
| let des: String | ||
| } | ||
| ``` | ||
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| 在 App 中设置好全局路由 | ||
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| ```swift | ||
| @main | ||
| struct LearnNavApp: App { | ||
| var body: some Scene { | ||
| WindowGroup { | ||
| NavigationStack { | ||
| ContentView() | ||
| .navigationDestination(for: Route.self) { route in | ||
| switch route { | ||
| case .all: | ||
| Text("显示所有图书") | ||
| case .create(let book): | ||
| Text("添加书 \(book.name)") | ||
| case .detail(let book): | ||
| Text("详细 \(book.des)") | ||
| } | ||
| } | ||
| } | ||
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| } | ||
| } | ||
| } | ||
| ``` | ||
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| 所有视图都可调用，调用方式如下： | ||
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| ```swift | ||
| NavigationLink("查看书籍详细说明", value: Route.detail(Book(name: "1984", des: "1984 Detail"))) | ||
| ``` | ||
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