【发布时间】：2023-03-28 10:26:01
【问题描述】：
升级flutter后，iOS模拟器的性能变得如此糟糕。例如，启动速度慢，显示键盘速度慢。
我跑了颤振医生。这是我的结果。
$ flutter doctor -v
[✓] Flutter (Channel master, v1.9.8-pre.35, on Mac OS X 10.14.6 18G87, locale ja-JP)
• Flutter version 1.9.8-pre.35 at /Users/rafekun/Developer/flutter
• Framework revision 1363528eee (4 days ago), 2019-08-31 05:26:41 -0400
• Engine revision cd858489cc
• Dart version 2.5.0 (build 2.5.0-dev.4.0 36985859e4)
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
• Android SDK at /Users/rafekun/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-29, build-tools 29.0.0
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.3, Build version 10G8
• CocoaPods version 1.7.5
[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 38.2.3
• Dart plugin version 191.8423
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
[✓] VS Code (version 1.37.0)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.3.0
[✓] Connected device (1 available)
• iPhone Xʀ • B3C345C3-5AB0-4627-B854-2C90016A3B69 • ios •
com.apple.CoreSimulator.SimRuntime.iOS-12-4 (simulator)
• No issues found!
【问题讨论】：
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我将 Flutter SDK 降级为更稳定的版本。但是，仍然存在同样的问题。
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附加
flutter run -v以获得更多诊断数据 -
我找到了解决方案。只需取消选中模拟器中的“慢速动画”即可。 Xcode 模拟器和 Flutter SDK 版本没有关系。