example react-navigation v3

//routes.js

import { createStackNavigator, createSwitchNavigator, createAppContainer } from 'react-navigation';

import SignIn from './screens/SignIn';
import Home from './screens/Home';

const AuthNavigator = createStackNavigator({
  SignIn,
});

const AppNavigator = createStackNavigator({
  Home,
});

const Router = createAppContainer(createSwitchNavigator(
  {
    Auth: AuthNavigator,
    App: AppNavigator,
  },
  {
    initialRouteName: 'Auth',
  },
));

export default Router;





// index.js

import Router from './routes';
...
<Router>
....