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/>;
      }
    }

 

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