blocprovider.of（）拨打不包含寄存器cubit的上下文

Question

当我尝试创建一个新用户时，出现了错误，注册页面昨天工作了，我没有更改任何内容。你能帮助我吗？

这是我的代码

注册库

    class RegisterCubit extends Cubit<RegisterStates> {
      RegisterCubit() : super(RegisterInitialState());
      static RegisterCubit get(context) => BlocProvider.of(context);
      bool isHidePassword = true;
      IconData password = Icons.visibility_outlined;
    
      void changePassword() {
        isHidePassword = !isHidePassword;
        password = isHidePassword
            ? Icons.visibility_outlined
            : Icons.visibility_off_outlined;
        emit(ChangePassVisibility());
      }
    ...

注册页面

 class Register extends StatelessWidget {
      final formKey = GlobalKey<FormState>();
      final emailController = TextEditingController();
      final passwordController = TextEditingController();
    
  Register({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return BlocProvider(
        create: (context) => RegisterCubit(),
        child: BlocConsumer<RegisterCubit, RegisterStates>(
          listener: (context, state) {},
          builder: (context, state) {
            var cubit = RegisterCubit.get(context);
            return Scaffold(
              ...

Answer 1

BlocProvider必须比消费者更高。您的BlocProvider和BlocConsumer都在同一上下文中，消费者无法以这种方式找到寄存器。您可以从应用程序的根小部件提供肘。因此，它将用于其余的构建环境。除此之外，您只需将bloconsumer用构建器窗口小部件包裹起来，它将提供一个可以访问您寄存器库的新的buildContext。

Answer 2

您可以尝试使用多BLOCPROVIDER包装“ Main.dart”的MiteralApp，然后注册您的Bloc提供商

示例：

Widget build(BuildContext context) {
    return MultiBlocProvider(
      providers: [
        BlocProvider(
          create: (BuildContext context) => AppCubit(),
        ),
        BlocProvider(
          create: (BuildContext context) => RegisterCubit()
        ),
      ],
      child: BlocConsumer<AppCubit, AppStates>(
          listener: (context, state) {},
          builder: (BuildContext context, state) {
            return MaterialApp(