javascript - Ugnježđivanje navigatora s React Navigatorima - 'Home' bi trebao deklarirati ekran

Trenutno radim s React Native i novim React Navigation. Tamo pokušavam pratiti vodič za ugnježđivanje navigatora, ali uvijek se pojavljuje greška:

Route 'Home' should declare a screen. For example:

import MyScreen from './MyScreen';
...
Home: {
   screen: MyScreen,
}

Nisam siguran što radim pogrešno. Kada pokrenem navigatore pojedinačno, rade. Ali nažalost ne rade zajedno.

Ovo je App.js, koji sam kreirao koristeći vodič:

import React from 'react';
import {
    AppRegistry,
    Text,
    View,
    Button
} from 'react-native';

import {
    StackNavigator,
    TabNavigator
} from 'react-navigation';

class HomeScreen extends React.Component {
    static navigationOptions = {
        title: 'Welcome',
    };
    render() {
        const { navigate } = this.props.navigation;
        return <View>
            <Text>Hello!</Text>
            <Button
                onPress={() => this.props.navigation.navigate('Chat', { user: 'Daniel' })}
                title="ReactNavigation Test"
            />
        </View>;
    }
}

class ChatScreen extends React.Component {
    static navigationOptions = {
        title: 'ReactNavigation Test',
    };
    render() {
        const { params } = this.props.navigation.state;
        return (
            <View>
                <Text>Neue Seite für den Navigator. Hallo {params.user}!</Text>
            </View>
        );
    }
}

class RecentChatsScreen extends React.Component {
    render() {
        return <Text>List of recent chats</Text>
    }
}

class AllContactsScreen extends React.Component {
    render() {
        return <Text>List of all contacts</Text>
    }
}

const ReactNativeTest = StackNavigator({
    Home: { screen: MainScreenNavigator },
    Chat: { screen: ChatScreen },
});

const MainScreenNavigator = TabNavigator({
    Recent: { screen: RecentChatsScreen },
    All: { screen: AllContactsScreen },
});

AppRegistry.registerComponent('ReactNativeTest', () => ReactNativeTest);

Možda mi tamo možeš pomoći. Postavio sam isto pitanje ovdje, ali možda je ovo bolje mjesto za to pitanje.

Unaprijed hvala!

Odgovor #1

I ja sam ovu pogrešku napravio kad sam tek počinjao...

Stavite MainScreenNavigator iznad ReactNativeTest.

Kako ga trenutno imate, MainScreenNavigator ne postoji kada se poziva.

const MainScreenNavigator = TabNavigator({
    Recent: { screen: RecentChatsScreen },
    All: { screen: AllContactsScreen },
});

const ReactNativeTest = StackNavigator({
    Home: { screen: MainScreenNavigator },
    Chat: { screen: ChatScreen },
});