I'm having a problem with a UIButton in a UIView: part of the button does not respond to touches. The cause is a UIStepper in another UIView. But, that view is hidden!
Why does the system think a UIStepper in another, hidden, view is still somehow there? (The UIStepper does not receive actual events.)
Solved my problem by really removing the view with the stepper from the views hierarchy instead of just hiding it.