事件監(jiān)聽

頁面 A

import { DeviceEventEmitter } from 'react-native';
componentDidMount() {
    //收到監(jiān)聽
    this.listener = DeviceEventEmitter.addListener('通知名稱', (message) => {
    //收到監(jiān)聽后想做的事情
    console.log(message);  //監(jiān)聽
    })
}
componentWillUnmount() {
    //移除監(jiān)聽
    if (this.listener) {
      this.listener.remove();
    }
  }

頁面 B

import { DeviceEventEmitter } from 'react-native';
func() {
    //準(zhǔn)備值，發(fā)監(jiān)聽
    const message = '監(jiān)聽';
    DeviceEventEmitter.emit('通知名稱', message);
}