Kotlin Multiplatform Academy · 课时

传递参数与深层链接

安全地在目标页面之间传递数据

传递参数与深层链接 是 CoddyKit 上的免费 Kotlin Multiplatform Academy 课时。这是第 2 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 Kotlin Multiplatform Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Kotlin Multiplatform 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。

Screens Need Data

A details screen has to know which item to show. Arguments are how one screen tells the next exactly what to display. 📦

Put the Value in the Route

You declare a placeholder right inside the route string. Curly braces mark where a value will be slotted in.

composable("details/{itemId}") { entry ->
    DetailsScreen(entry)
}

Read the Argument

Inside the destination you pull the value from the back stack entry. It arrives as a string you can use right away.

val itemId = entry.arguments?.getString("itemId")

Pass a Value When Navigating

To send data you simply build the real route with your value inside it, then navigate to that string.

navController.navigate("details/42")

Type-Safe Arguments

You can declare an argument as an Int instead of a string, so the framework parses and validates it for you.

composable(
    "details/{itemId}",
    arguments = listOf(navArgument("itemId") { type = NavType.IntType })
) { /* ... */ }

Optional Query Arguments

Some values are optional, like a search filter. You add them as query parameters after a question mark in the route.

navController.navigate("search?query=kotlin")

What Is a Deep Link

A deep link is a URL that opens a specific screen directly, even from outside the app. It maps a link to a route.

Register a Deep Link

You attach a deepLink pattern to a destination. When that URL arrives, navigation jumps straight to this screen.

composable(
    "details/{itemId}",
    deepLinks = listOf(navDeepLink { uriPattern = "myapp://details/{itemId}" })
) { /* ... */ }

Deep Links Carry Arguments Too

The same placeholders work in a deep link URL. The itemId from the link lands in your back stack entry like any argument.

Platforms Wire Links Differently

Android and iOS each register your URL scheme in their own config, but both then hand the link to the shared graph. 🔗

Keep Arguments Small

Pass an id, not a whole object. Let the destination load its own data from the id, so routes stay tiny and reliable.

Quick Check

How should you typically send a complex object to the next screen?

Recap: Data and Direct Links

You sent arguments through routes, read them on the next screen, and mapped a deep link URL straight to a destination. 🎯

常见问题解答

「传递参数与深层链接」课时是免费的吗？

是的 — 「传递参数与深层链接」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 Kotlin Multiplatform Academy 课程的其余内容，请升级到 CoddyKit PRO。 Kotlin Multiplatform Academy 课程共包含 4 节课。

「传递参数与深层链接」这节课中我会学到什么？

安全地在目标页面之间传递数据你通过在浏览器中直接运行的动手代码来练习 Kotlin Multiplatform 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 Kotlin Multiplatform Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Kotlin Multiplatform 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 2 节课，共 4 节。

「传递参数与深层链接」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 Kotlin Multiplatform Academy 课中编写并运行代码吗？

能。每节 Kotlin Multiplatform 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。

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