如何根据细分在世博会上推送通知

问题描述

我正在使用世博会推送通知 https://docs.expo.io/push-notifications/overview/

这是我使用的代码：

const [expoPushToken,setExpoPushToken] = useState('');
  const [notification,setNotification] = useState(false);
  const notificationListener = useRef();
  const responseListener = useRef();

  useEffect(() => {
    registerForPushNotificationsAsync().then((token) =>
      setExpoPushToken(token)
    );

    // This listener is fired whenever a notification is received while the app is foregrounded
    notificationListener.current =
      Notifications.addNotificationReceivedListener((notification) => {
        setNotification(notification);
      });

    // This listener is fired whenever a user taps on or interacts with a notification (works when app is foregrounded,backgrounded,or killed)
    responseListener.current =
      Notifications.addNotificationResponseReceivedListener((response) => {
        console.log(response);
      });

    return () => {
      Notifications.removeNotificationSubscription(
        notificationListener.current
      );
      Notifications.removeNotificationSubscription(responseListener.current);
    };
  },[]);

  async function registerForPushNotificationsAsync() {
    let token;
    if (Constants.isDevice) {
      const { status: existingStatus } =
        await Notifications.getPermissionsAsync();
      let finalStatus = existingStatus;
      if (existingStatus !== 'granted') {
        const { status } = await Notifications.requestPermissionsAsync();
        finalStatus = status;
      }
      if (finalStatus !== 'granted') {
        alert('Failed to get push token for push notification!');
        return;
      }
      token = (await Notifications.getExpoPushTokenAsync()).data;
      console.log(token);
    } else {
      alert('Must use physical device for Push Notifications');
    }

    if (Platform.OS === 'android') {
      Notifications.setNotificationChannelAsync('default',{
        name: 'default',importance: Notifications.AndroidImportance.MAX,vibrationPattern: [0,250,250],lightColor: '#FF231F7C',});
    }

    return token;
  }

我想根据细分向人们发送通知。我找不到关于博览会通知段的好资源。你有什么想法吗？

解决方法

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