void Start () {
        IOSNotificationController.instance.RegisterForRemoteNotifications (UnityEngine.iOS.NotificationType.Alert |  UnityEngine.iOS.NotificationType.Badge |  UnityEngine.iOS.NotificationType.Sound);
        IOSNotificationController.OnDeviceTokenReceived += OnDeviceTokenReceived;
        Debug.Log ("start loading screen");
}


void OnDeviceTokenReceived(IOSNotificationDeviceToken token) {
        Debug.Log ("OnTokenReceived");
        Debug.Log (token.tokenString);

        IOSNotificationController.OnDeviceTokenReceived -= OnDeviceTokenReceived;
}