Workaround for missing UIBarButtonItem's TouchUp event

Question

Hey,

using a UIButton allows me to catch TouchUpInside and TouchUpOutside events to know when the user releases the button with his finger.

UIBarButtonItem doesn't have any events/notifications to be used in this manner.

Does anyone know a nice workaround to know when a UIBarButtonItem is physically released? Is there a way to use an UIButton in a UIToolBar with the same "design" and behavior like a UIBarButtonItem?

Thanks!