Question

我刚刚更新到Xcode 11.6。我正在使用Dart＆Flutter编译我的代码。在iPhone和Android上运行模拟器可以正常工作，但是当我将其引入Xcode并在设备上运行时，出现错误Error: Getter not found: 'nonVirtual'.

我的猜测是，这是最新版本的Flutter或最新版本的Xcode中的错误。

Compiler message:
../../../../apps/flutter-projects/flutter/packages/flutter/lib/src/widgets/focus_traversal.dart:1125:4: Error: Getter not found: 'nonVirtual'.
  @nonVirtual
   ^^^^^^^^^^
../../../../apps/flutter-projects/flutter/packages/flutter/lib/src/widgets/focus_traversal.dart:1125:4: Error: This can't be used as metadata; metadata should be a reference to a compile-time constant variable, or a call to a constant constructor.
  @nonVirtual
   ^
../../../../apps/flutter-projects/flutter/packages/flutter/lib/src/widgets/framework.dart:507:4: Error: Getter not found: 'nonVirtual'.
  @nonVirtual
   ^^^^^^^^^^
../../../../apps/flutter-projects/flutter/packages/flutter/lib/src/widgets/framework.dart:507:4: Error: This can't be used as metadata; metadata should be a reference to a compile-time constant variable, or a call to a constant constructor.
  @nonVirtual
   ^
../../../../apps/flutter-projects/flutter/packages/flutter/lib/src/widgets/framework.dart:511:4: Error: Getter not found: 'nonVirtual'.
  @nonVirtual
   ^^^^^^^^^^
../../../../apps/flutter-projects/flutter/packages/flutter/lib/src/widgets/framework.dart:511:4: Error: This can't be used as metadata; metadata should be a reference to a compile-time constant variable, or a call to a constant constructor.
  @nonVirtual
   ^
../../../../apps/flutter-projects/flutter/packages/flutter/lib/src/painting/image_provider.dart:321:4: Error: Getter not found: 'nonVirtual'.
  @nonVirtual
   ^^^^^^^^^^
../../../../apps/flutter-projects/flutter/packages/flutter/lib/src/painting/image_provider.dart:321:4: Error: This can't be used as metadata; metadata should be a reference to a compile-time constant variable, or a call to a constant constructor.
  @nonVirtual
   ^
Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
build failed.


Command PhaseScriptExecution failed with a nonzero exit code

Answer 1

就我而言，我只运行了flutter升级，然后开始收到相同的消息。（我正在使用Android Studio开发）。

我发现最快的解决方法是创建一个新项目，并将我编写的所有代码复制到新项目中（保留所有自动生成的文件）。

这很可能会破坏我的提交历史，但是我需要作一个紧急介绍，这是我能想到的唯一快速解决方案。

Answer 2

复制步骤

运行“ flutter频道主”。
运行“ flutter升级”。
使用图表库绘制饼图。
运行“ flutter run”。

锻炼已经尝试

flutter更新软件包--force-upgrade
使缓存无效并重新启动android studio
删除了C：/ Users / Paras / AppData / Roaming / Pub / Cache，然后重新运行命令“ flutter run”。

错误：找不到吸气剂：'nonVirtual'。进行设备仿真编译时

2 个答案: