在VSCode中运行颤振项目时，我发现了这个错误

Question

[Running] dart "d:\app1\lib\main.dart"
lib/main.dart: Warning: Interpreting this as package URI, 'package:app1/main.dart'.
lib/main.dart:1:1: Error: The specified language version is too high. The highest supported language version is 2.16.
import 'package:flutter/material.dart';
^
/E:/flutter/packages/flutter/lib/src/material/animated_icons.dart:9:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui show Paint, Path, Canvas;
       ^
/E:/flutter/packages/flutter/lib/src/material/animated_icons.dart:10:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
       ^
/E:/flutter/packages/flutter/lib/src/material/app.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui;
       ^
/E:/flutter/packages/flutter/lib/src/material/app_bar_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
       ^
/E:/flutter/packages/flutter/lib/src/material/arc.dart:6:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
       ^
/E:/flutter/packages/flutter/lib/src/material/banner_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
       ^
/E:/flutter/packages/flutter/lib/src/material/bottom_app_bar_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
       ^
/E:/flutter/packages/flutter/lib/src/material/bottom_navigation_bar_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
       ^
/E:/flutter/packages/flutter/lib/src/material/bottom_sheet.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
       ^

[Done] exited with code=254 in 10.004 seconds

Answer 1

包版本与当前的省道版本不兼容。所以你可以试着看看你的材料包的版本，并将它与你使用的省道版本进行比较。在每种情况下，我都建议更新这两种情况，然后运行：

flutter clean
flutter pub get