是什么引起了Flutter提供者的下一个问题？解决方案是什么？

Question

编译器消息：

lib/main.dart:9:62: Error: A value of type 'UserProvider' can't be assigned to a variable of type 'Widget'.
 - 'UserProvider' is from 'package:user/provider/user_provider.dart' ('lib/provider/user_provider.dart').
 - 'Widget' is from 'package:flutter/src/widgets/framework.dart' ('/C:/flutter/packages/flutter/lib/src/widgets/framework.dart').
  runApp(ChangeNotifierProvider(builder: (_) => UserProvider.initialize(),
                                                             ^
lib/main.dart:9:42: Error: The argument type 'Widget Function(BuildContext)' can't be assigned to the parameter type 'Widget Function(BuildContext, Widget)'.
 - 'Widget' is from 'package:flutter/src/widgets/framework.dart' ('/C:/flutter/packages/flutter/lib/src/widgets/framework.dart').
 - 'BuildContext' is from 'package:flutter/src/widgets/framework.dart' ('/C:/flutter/packages/flutter/lib/src/widgets/framework.dart').
  runApp(ChangeNotifierProvider(builder: (_) => UserProvider.initialize(),
                                         ^
Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
build failed.

FAILURE: Build failed with an exception.

* Where:
Script 'C:\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 882

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\flutter\bin\flutter.bat'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 25s
Exception: Gradle task assembleDebug failed with exit code 1

Answer 1

我相信我有同样的问题...

这是我的代码：

void main（）{

runApp（ChangeNotifierProvider（

  builder: (_) => UserProvider.initialize(), // HERE IS THE PROBLEM

  create: (BuildContext context) {},

  child: MaterialApp(

    debugShowCheckedModeBanner: false,

    theme: ThemeData(primaryColor: Colors.deepOrange),

    home: ScreensController(),

  )));

希望有人可以帮助您