React Native 事件监听 注册与发送

A界面 注册监听

    //注册监听
    componentDidMount(){
        this.subscription = DeviceEventEmitter.addListener('noticeName', function (msg) {
            alert(msg)
        });
    }
    componentWillUnmount(){
        this.subscription.remove();

    }

B界面发送消息

调用此方法发送给A界面注册的监听
//参数1  跟注册的监听要一致,参数2 发送的参数
 DeviceEventEmitter.emit('noticeName','发送给A界面');