当应用程序位于前台且带有 Firebase 推送通知时没有通知

Question

当应用程序处于后台时我会收到通知，但当应用程序处于前台时则不会收到通知。我完全按照这里所说的去做。我做错了什么？

   func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, willPresent notification: UNNotification, withCompletionHandler completionHandler:  @escaping (UNNotificationPresentationOptions) -> Void) {
                
        let userInfo = response.notification.request.content.userInfo

       ...
            let sb = UIStoryboard(name: "Main", bundle: nil)
            let otherVC = sb.instantiateViewController(withIdentifier: "HomeVC") as! UITabBarController
            otherVC.selectedIndex = 2
            UIApplication.shared.keyWindow?.rootViewController = otherVC;
            completionHandler([.banner, .badge, .sound])
    }

Answer 1

// As we know, this method will be called when app received push notifications in foreground
func userNotificationCenter(_ center: UNUserNotificationCenter,
 willPresent notification: UNNotification,
 withCompletionHandler completionHandler: 
    @escaping (UNNotificationPresentationOptions) -> Void) {
{
    // Play a sound to let the user know about the invitation.
     completionHandler(.sound)
}