Just tried dragging a UIButton into the storyboard (xcode 7.1.1) and setting the background image in the storyboard, the label does disappear but then if I build and run in the simulator the label is visible. Looks like a bug with interface builder. If in the storyboard you then set an image aswell and then remove it the label then appears in the storyboard, looks like it's radar time.
Topic:
App & System Services
SubTopic:
Core OS
Tags: