Expo Notifications Demo - registerForPushNotifications

registerForPushNotifications.js

  async registerForPushNotifications() {
    const { status } = await Permissions.getAsync(Permissions.NOTIFICATIONS);

    if (status !== 'granted') {
      const { status } = await Permissions.askAsync(Permissions.NOTIFICATIONS);
      if (status !== 'granted') {
        return;
      }
    }

    const token = await Notifications.getExpoPushTokenAsync();

    this.subscription = Notifications.addListener(this.handleNotification);

    this.setState({
      token,
    });
  }