Flutter Material App导航显示黑屏

Question

我一直使用材料应用和路线在我的Flutter应用中进行导航。我正在使用 Navigator.of（context）.pushNamed（AppRoutes.appSkeleton）推送路线。使用路由在两个Dart文件之间导航时，我出现黑屏。

      @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'MyTestApp',
      theme: AppTheme.swatch,
      initialRoute: AppRoutes.initialRoute,
      routes: LoginState.LOGGED_IN == _loginState
          ? AppRoutes.homeRoutes
          : AppRoutes.routes,
      onGenerateRoute: AppRoutes.handleRoute,
      onUnknownRoute: (route) => AppRoutes.unknownRoute,
    );
  }

我AppRoutes.dart文件中的代码下面

static Map<String, WidgetBuilder> routes = {
    initialRoute: (context) => LoginPageView()
  };
  static Map<String, WidgetBuilder> homeRoutes = {
    initialRoute: (context) => AppSkeleton()
  };

  static MaterialPageRoute unknownRoute =
      MaterialPageRoute(builder: (builder) => AppSplashPageView());

AppRoute.dart代码

class AppRoutes {
  static final String initialRoute = '/';
  static final String devicePageRoute = '/device';
  static final String addDeviceRoute = '/add-device'; 
  static final String taddDeviceRoute = '/tadd-device';
  static final String taddHomeRoute = '/tadd-room';
  static final String loginRoute = '/login';
  static final String addRoomRoute = '/add-room';
  static final String manageRoomRoute = '/manage-room';
  static final String shareNetworkRoute = '/ShareNetwork'; 
  static final String logoutRoute = '/logout';
  static final String signUpRoute = '/SignUp';
  static final String ediProfileRoute = '/EditProfile';
  static final String appSkeleton = '/AppSkeleton';


  static Map<String, WidgetBuilder> routes = {
    initialRoute: (context) => LoginPageView()
  };
  static Map<String, WidgetBuilder> homeRoutes = {
    initialRoute: (context) => AppSkeleton()
  };

  static MaterialPageRoute unknownRoute =
      MaterialPageRoute(builder: (builder) => AppSplashPageView());

  static Route handleRoute(RouteSettings route) {
    return MaterialPageRoute(
      // ignore: missing_return
      builder: (BuildContext context) {
        if (route.name == devicePageRoute) {
           return DeviceControlScreen(route.arguments as DeviceBean);
        } else if (route.name == taddHomeRoute) {
          print("");
          return AddHomePageView();
        }  else if (route.name == appSkeleton) {
          return AppSkeleton();
        } else if (route.name == addRoomRoute) {
           return AddRoomScreen();
        } else {
          return UnknownRoute();
        }
      },
    );
  }
}

AppSkeleton.dart

class AppSkeleton extends StatefulWidget {
  @override
  _AppSkeletonState createState() => _AppSkeletonState();
}

class _AppSkeletonState extends State<AppSkeleton> {
  AppSkeletonController _controller;
  Widget body;
  @override
  void initState() {
    super.initState();
    body = HomePageView();
  }

  void _updatePage(Widget page) {
    this.setState(() {
      this.body = page;
    });
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      drawer: AppDrawer(),
      drawerScrimColor: Colors.transparent,
      body: body,
    );
  }
}

我有什么地方需要导航吗？或者如何实现两个DART文件之间的导航？请先提出建议并谢谢。