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reactjs - 如何在反应原生状态下保存一个信号播放器 ID

问题描述

我是本地人的新手，我正在使用一个信号进行通知。我从OneSignal.configure();这里获得了一个信号用户玩家 ID，并通过遵循我已经完成的代码，但该玩家 ID 我只能在控制台上看到。我正在使用setState保存状态，但它显示错误setState is not a function。我怎样才能让玩家 id 将其保存在状态中。

代码：

componentWillMount() {
          OneSignal.init("d447e6e2-0c8e-4781-8292-6e77d2e86691");

          OneSignal.configure();
          OneSignal.addEventListener('received', this.onReceived);
          OneSignal.addEventListener('opened', this.onOpened);
          OneSignal.addEventListener('ids', this.onIds);
      }

      componentWillUnmount() {
          OneSignal.removeEventListener('received', this.onReceived);
          OneSignal.removeEventListener('opened', this.onOpened);
          OneSignal.removeEventListener('ids', this.onIds);
      }

      onReceived(notification) {
          console.log("Notification received: ", notification);
      }

      onOpened(openResult) {
        console.log('Message: ', openResult.notification.payload.body);
        console.log('Data: ', openResult.notification.payload.additionalData);
        console.log('isActive: ', openResult.notification.isAppInFocus);
        console.log('openResult: ', openResult);
      }

      onIds(device) {
        console.log('Device info: ', device);
      console.log('player id: ', device.userId);
       this.setState({
            pid: device.userId,
          })
       console.log(this.state.pid);
      }

标签： reactjsreact-nativepush-notificationreact-native-androidonesignal

解决方案

事件侦听器函数不知道你的this，所以你必须使用bind你的this内部。

componentWillMount() {
    OneSignal.init('ONESIGNAL-APP-ID');

    OneSignal.addEventListener('received', this.onReceived.bind(this));
    OneSignal.addEventListener('opened', this.onOpened.bind(this));
    OneSignal.addEventListener('ids', this.onIds.bind(this));
    OneSignal.configure();
}

更新

您还可以声明为箭头函数以避免 .bind(this)：

componentWillMount() {
    OneSignal.init('ONESIGNAL-APP-ID');

    OneSignal.addEventListener('received', this.onReceived);
    OneSignal.addEventListener('opened', this.onOpened);
    OneSignal.addEventListener('ids', this.onIds);
    OneSignal.configure();
}

onReceived = () => {}
onOpened = () => {}
onIds = () => {}

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