Question

由于我完全迷路了，所以我希望您可以向某个方向指引我。今天，我在vs代码上打开了我的项目，但它永远停留在初始化flutter上。因此，我通过在控制台上运行Flutter启动了项目。而且我收到此错误消息。

我还应该指出，无论我尝试运行的项目如何，这个问题仍然存在。

我尝试在gradle包装器属性文件中更改gradle版本zip文件，还重新下载了该项目的当前版本并将其粘贴到dists /.gradle/wrapper/folder中，但是问题仍然存在

/C:/flutter/packages/flutter_tools/lib/src/build_runner/devfs_web.dart:97:7: Error: The non-abstract class 'WebAssetServer' is missing implementations for these members:
 - AssetReader.metadataContents
Try to either
 - provide an implementation,
 - inherit an implementation from a superclass or mixin,
 - mark the class as abstract, or
 - provide a 'noSuchMethod' implementation.
 
class WebAssetServer implements AssetReader {
      ^^^^^^^^^^^^^^
/C:/flutter/.pub-cache/hosted/pub.dartlang.org/dwds-5.1.0/lib/src/readers/asset_reader.dart:18:18: Context: 'AssetReader.metadataContents' is defined here.        
  Future<String> metadataContents(String serverPath);
                 ^^^^^^^^^^^^^^^^
/C:/flutter/packages/flutter_tools/lib/src/test/coverage_collector.dart:69:16: Error: The argument type 'Future<Map<String, Map<int, int>>>' can't be assigned to the parameter type 'Map<String, Map<int, int>>'.
 - 'Future' is from 'dart:async'.
 - 'Map' is from 'dart:core'.
    _addHitmap(coverage.createHitmap(data['coverage'] as List<Map<String, dynamic>>));
               ^
/C:/flutter/packages/flutter_tools/lib/src/test/coverage_collector.dart:101:16: Error: The argument type 'Future<Map<String, Map<int, int>>>' can't be assigned to 
the parameter type 'Map<String, Map<int, int>>'.
 - 'Future' is from 'dart:async'.
 - 'Map' is from 'dart:core'.
    _addHitmap(coverage.createHitmap(data['coverage'] as List<Map<String, dynamic>>));
               ^
Error: Unable to create dart snapshot for flutter tool.

Answer 1

如果您已将Flutter升级到最新版本，则很可能您的某些软件包可能不再更新。

开始检查pubspec.yaml中的每个软件包，并检查是否需要更新其中的任何一个。
您还需要检查文档中是否有任何重大更改。

应用停止了一天的工作，没有任何变化

1 个答案: