1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
| <!-- 在APP加载的第一个js入口处 -->
import React, { Component } from 'react'; import { AppState, View, Text } from 'react-native';
export default class App extends Component {
<!-- 在生命周期函数中创建监听函数 --> componentDidMount() { AppState.addEventListener('change', this.handleAppStateChange) }
handleAppStateChange = (currentAppState) => { if (currentAppState === 'active') { console.log('我又进来了') <!-- do something --> } else { console.log('现在在后台') <!-- do something --> } }
render() { console.disableYellowBox = true return ( <View> <Text> 我的第一个RN App </Text> </View> ); } }
|