Is it not possible to add a subview to a UIButton via Storyboard? This answer suggests it is possible in code, but how do you do it via Storyboard? Dragging a UIView to become a child of a UIButton isn't working.
Aware of simple workarounds like creating a parent UIView to hold the UIButton and subviews, but this question focuses on whether it's possible to add subviews to a UIButton inside of Storyboard.