How can you add a UIGestureRecognizer to a UIBarButtonItem as in the common undo/redo UIPopoverController scheme on iPad apps?

Question

Problem

In my iPad app, I cannot attach a popover to a button bar item only after press-and-hold events. But this seems to be standard for

Answer 1

Instead of groping around for a subview you can create the button on your own and add a button bar item with a custom view. Then you hook up the GR to your custom button.