Error: Could not find the correct Provider<DashboardBloc> above this DashboardPage Widget - FLUTTER

Question

我是 flutter 的新手，我试图在获得用户身份验证后允许我的应用程序移动到 DashboardPage，但我收到此错误：无法在此 DashboardPage 小部件上方找到正确的提供程序

发生这种情况是因为您使用的 BuildContext 不包括提供商任您选择。

这是我的代码 auth_page 在这两种情况下，代码和生物识别身份验证必须始终指向 DashboardPage() :

class AuthPage extends StatelessWidget {
  static String routeName = '/fingerprint';

  Future<void> localAuth(BuildContext context) async {
    final localAuth = LocalAuthentication();
    final didAuthenticate = await localAuth.authenticateWithBiometrics(
        localizedReason: 'Please authenticate');
    if (didAuthenticate) {
      Navigator.push(
        context,
        MaterialPageRoute(builder: (context) => DashboardPage()),
      );
    }
  }

  @override
  Widget build(BuildContext context) => Scaffold(
    appBar: AppBar(
      centerTitle: true,
    ),
    body: Padding(
      padding: EdgeInsets.all(32),
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            buildPinScreen(context),
            SizedBox(height: 24),
            SizedBox(height: 24),
          ],
        ),
      ),
    ),
  );

  Widget buildPinScreen(BuildContext context) => buildButton(
      text: 'UnLock',
      icon: Icons.lock_open,
      onClicked: () async {
        screenLock(context: context, correctString: '1234',
        canCancel: true,
           didUnlocked: (){
             Navigator.push(
               context,
               MaterialPageRoute(builder: (context) => DashboardPage()),
             );
           },

       customizedButtonTap: () async {
        await localAuth(context);

       },
        didOpened: () async {
      await localAuth(context);

        },
        );
        }
     );

这是我的代码 class route_configuration :

final router = FluroRouter();

class RouteConfiguration {
  static Future<void> register() async {
    // Register the routes
    router.define("/", handler: rootHandler);
    router.define(AssetFormScreen.routeName, handler: assetFormHandler);
    router.define(AssetTransferScreen.routeName, handler: assetTransferHandler);
    router.define(ShareAddressScreen.routeName, handler: shareAddressHandler);
    router.define(DashboardPage.routeName, handler: dashboardHandler);
  }
}

这是我的代码 class route_handlers :

var rootHandler = Handler(
  type: HandlerType.route,
  handlerFunc: (BuildContext? context, Map<String, List<String>> params) {
    return MultiBlocProvider(
      providers: [
        BlocProvider<MainBloc>(
          create: (_) => MainBloc(accountRepository: accountRepository),
        ),
        BlocProvider<NavigationBloc>(
          create: (_) => NavigationBloc(tabs[0]),
        ),
      ],
      child: MainScreen(),
    );
  },
);

var assetTransferHandler = Handler(
  handlerFunc: (BuildContext? context, Map<String, List<String>> params) {
    final asset = context?.settings?.arguments;
    if (asset is! AlgorandStandardAsset) return null;

    return BlocProvider(
      create: (_) =>
          AssetTransferBloc(accountRepository: accountRepository)..start(asset),
      child: AssetTransferScreen(),
    );
  },
);

var assetFormHandler = Handler(
  handlerFunc: (BuildContext? context, Map<String, List<String>> params) {
    return BlocProvider<AssetFormBloc>(
      create: (_) => AssetFormBloc(accountRepository: accountRepository),
      child: AssetFormScreen(),
    );
  },
);

var shareAddressHandler = Handler(
  handlerFunc: (BuildContext? context, Map<String, List<String>> params) {
    final address = params['address']?[0] ?? '';

    return BlocProvider<AssetFormBloc>(
      create: (_) => AssetFormBloc(accountRepository: accountRepository),
      child: ShareAddressScreen(
        address: address,
      ),
    );
  },
);

var dashboardHandler = Handler(
  handlerFunc: (BuildContext? context, Map<String, List<String>> params) {
    return BlocProvider<DashboardBloc>(
      create: (_) => DashboardBloc(accountRepository: accountRepository),
      child: DashboardPage(),
    );
  },
);

请帮助我！

Answer 1

Bloc 不适用于您推送到堆栈中的所有新页面，甚至不适用于新的小部件。要将现有的 bloc 提供给新页面，您必须使用 bloc provider。

 Navigator.push(context,
   MaterialPageRoute(
    builder: (context1) =>
     BlocProvider.value(
      value: BlocProvider.of<BlocName>(context),
        child: DashboardPage())));

Error: Could not find the correct Provider<DashboardBloc> above this DashboardPage Widget - FLUTTER

Error: Could not find the correct Provider<DashboardBloc> above this DashboardPage Widget - FLUTTER

flutter

mobile

locking

lockscreen

touch-id