分析并缩减 iOS 框架
测量设备上的大小和运行时开销
分析并缩减 iOS 框架 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。
Why Framework Size Matters
Your Kotlin code ships to iOS as a binary framework. A bloated one slows app launch and eats download size, so trimming it pays off.
Measure the Baseline First
You cannot shrink what you have not measured. Check the built .framework file size so every later change has a number to compare against.
du -h shared.framework/sharedRelease, Not Debug
Always profile the release framework. Debug builds skip optimization and carry extra symbols, giving you misleading, much larger sizes.
./gradlew linkReleaseFrameworkIosArm64Strip Debug Symbols
Symbol tables help debugging but bloat the binary. Stripping them for production shrinks the framework with no effect on behavior.
Watch Your Dependencies
Every library you pull into commonMain rides along to iOS. Each dependency adds bytes, so drop ones you do not truly need.
Dead Code Elimination
The Kotlin/Native compiler prunes unreachable code. Keeping your public API small helps it strip more of what iOS never calls.
Smaller Public Surface
Mark internal helpers as internal, not public. Exported declarations cannot be removed, so a tight surface means a leaner binary.
internal fun helper() = compute()Profile Launch Cost
Size is one thing, speed another. Use Xcode Instruments to see how long loading and initializing the framework actually takes.
Avoid Heavy Top-Level Init
Code that runs at framework load adds launch lag. Keep initialization lazy so work happens only when the feature is first used.
Bitcode Is Gone
Apple dropped bitcode, so you no longer carry it. Make sure old build settings are not still bloating your framework for nothing.
Track Size Over Time
Sizes creep up quietly. Record the framework size in CI so a sudden jump flags the commit that added the weight.
Quick Check
Recall which build configuration gives a trustworthy size reading.
Recap
You measured the release framework, stripped symbols, trimmed dependencies and the public API, profiled launch in Instruments, and tracked size in CI. 📉
常见问题解答
「分析并缩减 iOS 框架」课时是免费的吗？
是的 — 「分析并缩减 iOS 框架」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。
「分析并缩减 iOS 框架」这节课中我会学到什么？
测量设备上的大小和运行时开销 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。
「分析并缩减 iOS 框架」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。