iPhone SDK Annotation/Callout bubble on an image/button press

Is it possible to show the typical iPhone maps annotation/callout bubble (MK开发者_JAVA技巧Annotation), on something other than a map?

I'd like one to popup when I touch a UIButton in a UIView. (i.e. nothing to do with a map!)

Can someone point me in the right direction?

Regards

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Yes, but that's with an undocumented class known as UICalloutView.

For AppStore apps you need to create your own custom view.