1 问题

部分代码如下

class HomeScreen extends React.Component {render() {return (<View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}><Text>Home Screen</Text></View>);}
}export default createStackNavigator({Home: {screen: HomeScreen},
});export default class App extends React.Component {render() {return <RootStack/>;}
}

 

 

 

2 解决办法

export default 声明只能有一个,改成如下即可

import React from 'react';
import { View, Text } from 'react-native';
import { createStackNavigator } from 'react-navigation';class HomeScreen extends React.Component {render() {return (<View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}><Text>Home Screen</Text></View>);}
}const RootStack = createStackNavigator({Home : {screen : HomeScreen},
});export default class App extends React.Component {render() {return <RootStack/>;}
}