switch navigator in react-navigation v5 - react-native

Question

There is a good example of switch navigator in V4 documentation of react-navigation:
https://snack.expo.io/#react-navigation/auth-flow-v3
I didn't understand how can I change this into a proper way for V5. here is the link:
https://reactnavigation.org/docs/en/upgrading-from-4.x.html#switch-navigator
Any assistance you can provide would be greatly appreciated.

Answer 1

Well, if you want to implement a "switch" like feature with V5, you need to opt into using the new <Stack.Navigator /> definition. Basically, the <Stack.Navigator /> can have children which are <Stack.Screen /> and anytime you explicitly switch between them (or set them to null), it will animate between them. You can find more documentation on how to do this here: https://reactnavigation.org/docs/auth-flow

Answer 2

There is no createSwitchNavigator in React-Navigation v5.
So it can be implement as below.
App.js
// login flow
const Auth = createStackNavigator();
const AuthStack =()=> (
<Auth.Navigator
initialRouteName="Login"
screenOptions={{
animationEnabled: false
}}
headerMode='none'
>
<Auth.Screen name="Login" component={LoginScreen} />
<Auth.Screen name="Signup" component={SignupScreen} />
</Auth.Navigator>
)
// drawer use only in authenticated screens
const Drawer = createDrawerNavigator();
const DrawerStack = () => (
<Drawer.Navigator initialRouteName="Home">
<Drawer.Screen name="Home" component={HomeScreen} />
<Drawer.Screen name="Settings" component={SettingsScreen} />
<Drawer.Screen name="Logout" component={LogoutScreen}/>
</Drawer.Navigator>
)
const RootStack = createStackNavigator();
class App extends Component {
constructor() {
super();
this.state = {
loading: true,
hasToken: false,
};
}
componentDidMount(){
AsyncStorage.getItem('jwtToken').then((token) => {
this.setState({ hasToken: token !== null,loading:false})
})
}
render() {
const {loading,hasToken} = this.state;
if (loading) {
return <WelcomeScreen/>
}
else {
return(
<NavigationContainer>
<RootStack.Navigator headerMode="none">
{ !hasToken ?
<RootStack.Screen name='Auth' component={AuthStack}/>
:
RootStack.Screen name='App' component={DrawerStack}/>
}
</RootStack.Navigator>
</NavigationContainer>
);
}
}
}
export default App;
This is only one way of doing authentication.I haven't use Redux or React Hooks here.You can see the example which used React Hooks in the React Navigation v5 documentation.

Answer 3

I think I found a solution for this issue which will block all unwanted navigation from the user and still keep smooth transitions between screens.
You need to add navigation.service.js like this:
import * as React from 'react';
export const navigationRef = React.createRef();
export const navigate = (routeName, params) => {
navigationRef.current?.navigate(routeName, params);
}
export const changeStack = (stackName) => {
resetRoot(stackName)
}
const resetRoot = (routeName) => {
navigationRef.current?.resetRoot({
index: 0,
routes: [{ name: routeName }],
});
}
add that ref from navigationService to NavigationContainer like this:
<NavigationContainer ref={navigationService.navigationRef}>
<Navigation />
</NavigationContainer>
now when you know you need to change stack, just call changeStack instead of navigate.
I have explained this solution in more details here:
Change stacks in react-navigation v5