使用提供程序显示错误时显示snackbar时发生错误

Question

当用户登录时，我处于当前状态，我从提供程序调用该方法，并根据状态渲染新状态。发生错误时，我想显示带有错误消息的小吃店按钮。

但是我遇到了以下错误：

错误

The following assertion was thrown building Consumer<AuthProvider>(dirty, dependencies: [_InheritedProviderScope<AuthProvider>]):
setState() or markNeedsBuild() called during build.

提供商

void signIn(String email, String password) async {
    _logLoading(_loginStatus);
    try {
      print("Loggin with email $email and password $password");
      _user = await _authService.signInWithEmailAndPassword(email, password);
      _logSuccess(_loginStatus, 'You have logged successfully');
    } catch (e) {
      _logError(_loginStatus, e.toString());
    }
}

  void _logLoading(StatusHolder statusHolder) {
    statusHolder.status = Status.Loading;
    notifyListeners();
  }

  void _logSuccess(StatusHolder statusHolder, String message) {
    statusHolder.status = Status.Success;
    statusHolder.successMessage = message;
    notifyListeners();
  }

  void _logError(StatusHolder statusHolder, String message) {
    statusHolder.status = Status.Failure;
    statusHolder.errorMessage = message;
    notifyListeners();
  }

小工具

Consumer<AuthProvider>(
  builder: (context, model, child) {
              switch (model.loginStatus.status) {
                case Status.Loading:
                  return Center(
                    child: CircularProgressIndicator(),
                  );
                case Status.Failure:
                  Scaffold.of(context).showSnackBar(SnackBar(
                    content: Text(model.loginStatus.errorMessage),
                  ));
                  return _idlePart(context);
                case Status.Success:
                  Navigator.pushReplacement(
                      context,
                      MaterialPageRoute(
                        builder: (context) => HomeScreen(),
                      ));
                  return Container();

                case Status.Idle:
                default:
                  return _idlePart(context);
              }
            },
          ),