延迟didRegisterForRemoteNotificationsWithDeviceToken

Question

出于某种原因，我的iOS应用程序之间有几分钟的延迟 registerForRemoteNotifications和didRegisterForRemoteNotificationsWithDeviceToken

有时多达5分钟 任何想法为什么会这样？

extension AppDelegate: UNUserNotificationCenterDelegate {
func requestPushNotification() {
    if #available(iOS 10.0, *) {
        UNUserNotificationCenter.currentNotificationCenter().delegate = self
        UNUserNotificationCenter.currentNotificationCenter().requestAuthorizationWithOptions([UNAuthorizationOptions.Alert, UNAuthorizationOptions.Sound, UNAuthorizationOptions.Badge]) { (success, error) in
            if success {
                //UIApplication.sharedApplication().registerForRemoteNotifications()
                let settings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)
                UIApplication.sharedApplication().registerUserNotificationSettings(settings)
            } else {
                if error != nil {
                    Crashlytics.sharedInstance().recordError(error!)
                }
            }
        }
    } else {
        let settings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)
        UIApplication.sharedApplication().registerUserNotificationSettings(settings)
        //UIApplication.sharedApplication().registerForRemoteNotifications()
    }
}

@available(iOS 10.0, *)
func userNotificationCenter(center: UNUserNotificationCenter, willPresentNotification notification: UNNotification, withCompletionHandler completionHandler: (UNNotificationPresentationOptions) -> Void) {
    print("willPresentNotification")
}

@available(iOS 10.0, *)
func userNotificationCenter(center: UNUserNotificationCenter, didReceiveNotificationResponse response: UNNotificationResponse, withCompletionHandler completionHandler: () -> Void) {
    print("didReceiveNotificationResponse")
}

func application(application: UIApplication, didRegisterUserNotificationSettings notificationSettings: UIUserNotificationSettings) {
    if notificationSettings.types != UIUserNotificationType() {
        application.registerForRemoteNotifications()
    }
}

func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {
    Crashlytics.sharedInstance().recordError(error)
    print(error)
}
}

和

func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
}

任何想法都将不胜感激