以代码控制导航路径
使用 navigationDestination 路径驱动导航。
以代码控制导航路径 是 CoddyKit 上的免费 SwiftUI Academy 课时。 这是第 4 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 SwiftUI Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 SwiftUI Academy 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Navigating From Code
Sometimes a tap is not enough. After saving a form you may want to jump screens yourself. SwiftUI lets you drive the stack from code. ⚙️
A Path You Control
Give NavigationStack a path binding. This array is the live list of screens currently pushed, and editing it changes navigation instantly.
@State private var path = NavigationPath()
NavigationStack(path: $path) { HomeView() }Push by Appending
Append a value to the path and SwiftUI pushes the matching screen. No tap needed, just change the array.
path.append(book)Routing the Value
A navigationDestination maps each value type in the path to a view, so appended data knows which screen to become.
.navigationDestination(for: Book.self) { book in
DetailView(book: book)
}Pop With Remove
Removing the last element pops a screen, exactly like the back button. You stay in full control of the stack from code.
path.removeLast()Jump Home Instantly
To return all the way to the root, empty the path. Every pushed screen disappears at once, perfect for a Done button. 🏠
path.removeLast(path.count)Deep Linking
Because the path is just data, you can build it from a URL or notification, pushing several screens so users land deep inside the app.
NavigationPath Holds Mixed Types
A NavigationPath can store values of different types together, letting one stack route books, users, and settings without a shared enum.
Or Use a Typed Array
If every screen shares one type, a plain typed array works as the path and reads a little more clearly than NavigationPath.
@State private var path: [Book] = []State Drives the Stack
Navigation becomes state. The visible screens always mirror the path array, so your UI stays predictable and easy to reason about.
Test and Restore
Since the path is plain data, you can save it and restore it, recreating exactly where the user left off when they reopen the app.
Quick Check
What happens when you append a value to a NavigationStack path?
Recap: Programmatic Paths
You bind a path to NavigationStack and push or pop screens by editing that array, turning navigation into predictable, testable state. 🎉
常见问题解答
「以代码控制导航路径」课时是免费的吗？
是的 — 「以代码控制导航路径」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 SwiftUI Academy 课程的其余内容，请升级到 CoddyKit PRO。 SwiftUI Academy 课程共包含 4 节课。
「以代码控制导航路径」这节课中我会学到什么？
使用 navigationDestination 路径驱动导航。 你通过在浏览器中直接运行的动手代码来练习 SwiftUI Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 SwiftUI Academy 需要有经验吗？
无需任何先前经验。CoddyKit 上的 SwiftUI Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 4 节课，共 4 节。
「以代码控制导航路径」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 SwiftUI Academy 课中编写并运行代码吗？
能。每节 SwiftUI Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。