AddGestureRecognizer to UIBarButtonItem (to detect long press)

Hi all,

when I'd like to detect a long press on a UIBarButtonItem in my NavigationBar.

           var longPressRecogniser = new UILongPressGestureRecognizer(OnFilterLongPress);
            NavigationItem.LeftBarButtonItems[0].AddGestureRecognizer(longPressRecogniser);

But then I get this error: 'MonoTouch.UIKit.UIBarButtonItem' does not contain a definition for 'AddGestureRecognizer' and no extension method 'AddGestureRecognizer' accepting a first argument of type 'MonoTouch.UIKit.UIBarButtonItem' could be found (are you missing a using directive or an assembly reference?)

Is there absolutely no way to do this?

Thanks!