React Native学习之DeviceEventEmitte

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',(info) =>{
          alert('通知' + info);
     })
},

移除DeviceEventEmitter

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

发送通知

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