使用DeviceEventEmitter前需添加

import {     AppRegistry,     StyleSheet,     Text,     View,     DeviceEventEmitter } form 'react-native';

 

 添加DeviceEventEmitter

componentDidMount() {     this.subscription = DeviceEventEmitter.addListener('userNameDidChange',(userName) =>{          alert('通知');     })},

 

 移除DeviceEventEmitter

componentWillUnmount() {    // 移除    this.subscription.remove();},

 

 发送通知

DeviceEventEmitter.emit('userNameDidChange', '通知来了');

 

 OK, 完成! 赶紧试试吧! ~~