Kotlin Multiplatform Academy · 课时

不要将界面放入共享代码

划清边界，让共享层保持可移植

不要将界面放入共享代码 是 CoddyKit 上的免费 Kotlin Multiplatform 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 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。

Draw a Clear Line

Shared code holds logic; the UI stays native. Drawing this line early keeps your common module portable to every target.

Why UI Does Not Belong

Android views and SwiftUI are platform-specific. Putting them in commonMain would break compilation on the other target instantly.

Logic Is the Reusable Part

Calculations, rules and models are what truly repeat across apps. That logic is the high-value code worth sharing once.

Return Data, Not Widgets

Shared functions should hand back plain data, like a total or a label string, never a button or a view.

fun cartLabel(total: Double): String = "Total due: " + total

No Toasts or Alerts

Showing a message is a UI job. Shared code returns the text to show; each app decides how to display it.

No Colors or Styling

Hex colors and fonts are presentation. Keep styling in each platform's UI so designers can tune apps independently.

Expose State to the UI

Shared code can publish state the UI watches. The apps render it however they like, but never the other way around.

data class CartState(val total: Double, val itemCount: Int)

The Dependency Direction

UI depends on shared code, never the reverse. This one-way arrow is what keeps the common module clean and reusable.

Compose MP Is the Exception

Compose Multiplatform can share UI too, but it is opt-in. Your core logic module still stays UI-free and lightweight.

A Quick Smell Test

If a shared file imports a platform UI package, that is a smell. Move that code out into the right app module.

The Payoff

A UI-free shared layer compiles everywhere and adds new targets with ease. Discipline here is what makes KMP pay off. 🚀

Quick Check

What should a shared function return instead of a UI widget?

Recap: Logic Shared, UI Native

You kept widgets, colors and alerts out of common code and let it expose only data the native UIs render. ✅

常见问题解答

「不要将界面放入共享代码」课时是免费的吗？

是的 — 「不要将界面放入共享代码」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。

「不要将界面放入共享代码」这节课中我会学到什么？

划清边界，让共享层保持可移植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 4 节课，共 4 节。

「不要将界面放入共享代码」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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