运行Flutter应用自动终止，报MultiChildLayout相关类型未找到错误

错误信息 #

/C:/flutter/flutter/packages/flutter/lib/src/widgets/basic.dart:2181:41: Error: Type 'MultiChildLayoutParentData' not found.
class LayoutId extends ParentDataWidget {
^^^^^^^^^^^^^^^^^^^^^^^^^^
/C:/flutter/flutter/packages/flutter/lib/src/widgets/basic.dart:2268:9: Error: Type 'MultiChildLayoutDelegate' not found.
final MultiChildLayoutDelegate delegate;
^^^^^^^^^^^^^^^^^^^^^^^^
/C:/flutter/flutter/packages/flutter/lib/src/widgets/basic.dart:2271:3: Error: Type 'RenderCustomMultiChildLayoutBox' not found.
RenderCustomMultiChildLayoutBox createRenderObject(BuildContext context) {

解决方案 #

• 清理项目缓存并重新拉取依赖
  1. 在项目根目录打开终端，执行：

     flutter clean
     

  2. 接着执行：

     flutter pub get
     

• 检查并修复Flutter SDK
  1. 执行命令排查SDK状态：

     flutter doctor
     

  2. 如果提示SDK损坏或缺失核心组件，直接重新下载完整的Flutter SDK替换现有目录
• 删除本地缓存文件
  手动删除项目根目录下的.dart_tool和build文件夹，再重新执行flutter pub get和flutter run
• 重置VS Code的Flutter服务
  1. 打开VS Code命令面板（快捷键Ctrl+Shift+P）
  2. 搜索并执行Flutter: Restart Flutter Daemon
  3. 重启VS Code后重新运行项目

内容的提问来源于stack exchange，提问作者swabeeh Asharaf