Flutter 热加载和热重启的区别reload restart

最新推荐文章于 2025-06-25 09:02:25 发布

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最新推荐文章于 2025-06-25 09:02:25 发布 · 792 阅读

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#flutter #热加载和热重启的区别

本文详细解释了Flutter开发中热重载、热重启及完全重启的区别与应用场景。热重载能在保留应用状态的同时快速加载代码变更并重建UI组件树；热重启则会重新加载代码并重启Flutter应用，但会丢失当前应用状态；而完全重启则会重新启动iOS、Android或Web应用，包括重新编译Java/Kotlin/ObjC/Swift代码。

As a general rule, if the modified code is downstream of the root widget’s build method, then hot reload behaves as expected. However, if the modified code won’t be re-executed as a result of rebuilding the widget tree, then you won’t see its effects after hot reload

What is the difference between hot reload, hot restart, and full restart?

Hot reload loads code changes into the VM and re-builds the widget tree, preserving the app state; it doesn’t rerun main() or initState(). (⌘\ in Intellij and Android Studio, ⌃F5 in VSCode)
Hot restart loads code changes into the VM, and restarts the Flutter app, losing the app state. (⇧⌘\ in IntelliJ and Android Studio, ⇧⌘F5 in VSCode)
Full restart restarts the iOS, Android, or web app. This takes longer because it also recompiles the Java / Kotlin / ObjC / Swift code. On the web, it also restarts the Dart Development Compiler. There is no specific keyboard shortcut for this; you need to stop and start the run configuration.

Flutter web currently supports hot restart but not hot reload.