Could not find a generator for route RouteSettings("/passArguments", Instance of 'ScreenArguments') in the _CustomTabViewState.

[mtical]

Seems to be an issue passing arguments over with a Navigator.pushNamed(context, PassArgumentsScreen.routeName, arguments: ScreenArguments('arg1', 'arg2')); when using persistent bottom nav bar.

persistent_bottom_nav_bar: ^2.0.5 Flutter 1.22.0

Code to reproduce:

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:persistent_bottom_nav_bar/persistent-tab-view.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      onGenerateRoute: (settings) {
        // If you push the PassArguments route
        if (settings.name == PassArgumentsScreen.routeName) {
          // Cast the arguments to the correct type: ScreenArguments.
          final ScreenArguments args = settings.arguments;

          return MaterialPageRoute(
            builder: (context) {
              return PassArgumentsScreen(
                title: args.title,
                message: args.message,
              );
            },
          );
        }
        assert(false, 'Need to implement ${settings.name}');
        return null;
      },
      title: 'Navigation with Arguments',
      home: Home(),
    );
  }
}

class ScreenOne extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Home Screen'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            GestureDetector(
              child: Text("Navigate to a named that accepts arguments"),
              onTap: () {
                // When the user taps the button, navigate to a named route
                // and provide the arguments as an optional parameter.
                Navigator.pushNamed(
                  context,
                  PassArgumentsScreen.routeName,
                  arguments: ScreenArguments(
                    'Accept Arguments Screen',
                    'This message is extracted in the onGenerateRoute function.',
                  ),
                );
              },
            ),
          ],
        ),
      ),
    );
  }
}

// A Widget that accepts the necessary arguments via the constructor.
class PassArgumentsScreen extends StatelessWidget {
  static const routeName = '/passArguments';

  final String title;
  final String message;

  const PassArgumentsScreen({
    Key key,
    @required this.title,
    @required this.message,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(title),
      ),
      body: Center(
        child: Text(message),
      ),
    );
  }
}

class ScreenArguments {
  final String title;
  final String message;

  ScreenArguments(this.title, this.message);
}

class Home extends StatefulWidget {
  Home({Key key}) : super(key: key);

  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  @override
  Widget build(BuildContext context) {
    PersistentTabController _controller = PersistentTabController(initialIndex: 0);

    return PersistentTabView(
      routeName: '/',
      screens: _buildScreens(),
      controller: _controller,
      items: _navBarsItems(),
      confineInSafeArea: true,
      backgroundColor: Colors.black,
      handleAndroidBackButtonPress: true,
      resizeToAvoidBottomInset: true,
      stateManagement: true,
      hideNavigationBarWhenKeyboardShows: true,
      decoration: NavBarDecoration(
        borderRadius: BorderRadius.circular(10.0),
        colorBehindNavBar: Colors.white,
      ),
      popAllScreensOnTapOfSelectedTab: true,
      // Navigation Bar's items animation properties.
      itemAnimationProperties: ItemAnimationProperties(
        duration: Duration(milliseconds: 200),
        curve: Curves.ease,
      ),
      // Screen transition animation on change of selected tab.
      screenTransitionAnimation: ScreenTransitionAnimation(
        animateTabTransition: true,
        curve: Curves.ease,
        duration: Duration(milliseconds: 200),
      ),
      navBarStyle: NavBarStyle.style6,
    );
  }

  List<PersistentBottomNavBarItem> _navBarsItems() {
    return [
      PersistentBottomNavBarItem(
        // rectangle_grid_1x2
        icon: Icon(Icons.search),
        activeColor: CupertinoColors.white,
        inactiveColor: CupertinoColors.systemGrey,
      ),
      PersistentBottomNavBarItem(
        // rectangle_grid_1x2
        icon: Icon(Icons.home),
        activeColor: CupertinoColors.white,
        inactiveColor: CupertinoColors.systemGrey,
      ),
    ];
  }

  List<Widget> _buildScreens() {
    return [
      ScreenOne(),
      PassArgumentsScreen(),
    ];
  }
}

[geekhenno]

I have the same problem

[BilalShahid13]

I'll look into it ASAP.

[NitelPhyoe]

@BilalShahid13 can you show us solution for named route?

[BilalShahid13]

@NitelPhyoe You can push like you would without the navigation bar i.e. Navigator.pushNamed(context, "routeName");.

[dhalloop7]

@NitelPhyoe You can push like you would without the navigation bar i.e. Navigator.pushNamed(context, "routeName");.

I tried the same but it won't work for me.

Could not find a generator for route RouteSettings("/subCategory", null) in the _CustomTabViewState. Generators for routes are searched for in the following order:

1. For the "/" route, the "builder" property, if non-null, is used.
2. Otherwise, the "routes" table is used, if it has an entry for the route.
3. Otherwise, onGenerateRoute is called. It should return a non-null value for any valid route not handled by "builder" and "routes".
4. Finally if all else fails onUnknownRoute is called. Unfortunately, onUnknownRoute was not set.

[BilalShahid13]

Are you sure the new screen is below in level of widget/screen hierarchy than the current screen? I tried pushing it but I faced no such issues.

[BilalShahid13]

I was able to successfully reproduce the problem. It is now fixed in version 3.1.0 but you will have to define your routes in the argument routeAndNavigatorSettings for it to work.

[iamnabink]

I was able to successfully reproduce the problem. It is now fixed in version 3.1.0 but you will have to define your routes in the argument routeAndNavigatorSettings for it to work.

@BilalShahid13 , Okay.. Now i can successfully navigate with named route but now It's creating a stack of widget when i navigate back with named route

[BilalShahid13]

Can you try again using the latest version 4.0.0? You probably will have to pop the screens before navigating again with named route.

[AhmadRehan71]

When Navigator.pushNamed(context, "routeName"); is used, It always pushes new screen with NavBar. Any way to to hide it when using Navigator.pushNamed(context, "routeName"); ?

[HussainObn]

Dear all I am using persistent_bottom_nav_bar: ^4.0.2 and I am still facing the same issue... every time I am trying to use pushnamed it creates this error. Any idea how to fix it.

[kevinkooyizen]

+1

[aonpongsiri]

@HussainObn set your routes in the argument [routeAndNavigatorSettings] in [PersistentBottomNavBarItem]

[maazkhan1998]

@aonpongsiri your solution doesnt works for PersistentTabView.custom

[nehal076]

+1 I am trying this

              Navigator.pushNamedAndRemoveUntil(
                context,
                Screens.auth,
                (_) => false,
              );

but I am getting this :

[log] Could not find a generator for route RouteSettings("auth", null) in the _CustomTabViewState.
      Generators for routes are searched for in the following order:
       1. For the "/" route, the "builder" property, if non-null, is used.
       2. Otherwise, the "routes" table is used, if it has an entry for the route.
       3. Otherwise, onGenerateRoute is called. It should return a non-null value for any valid route not handled by "builder" and "routes".
       4. Finally if all else fails onUnknownRoute is called.
      Unfortunately, onUnknownRoute was not set.

& I have also set onUnknownRoute on my MaterialApp.

onUnknownRoute: (settings) { return MaterialPageRoute(builder: (context) => const Auth()); },

[Tarhex]

@nehal076

You need to define the route like so:

PersistentBottomNavBarItem(
        icon: const Icon(Icons.settings),
        title: "Settings",
        activeColorPrimary: Colours.darkyBlue,
        inactiveColorPrimary: Colors.grey,
        routeAndNavigatorSettings: RouteAndNavigatorSettings(
          initialRoute: "/",
          routes: {
            "/auth": (final context) => const AuthApp(),
          },
        ),
),

[abdocrowinho]

@Tarhex

i did this solution , but bottom nav bar stayed in the screen and i don't want that

how i can resolve this ?

[Tarhex]

@Tarhex

i did this solution , but bottom nav bar stayed in the screen and i don't want that

how i can resolve this ?

What do you want to achieve? Navigate to another page without the BottomNavBar?