title: How do I programmatically change the background image of a UIButton added to a NIB on iOS?
body: <p>I've seen several questions/answers related to entirely creating a button in code, but not one which would let me know how to change the button image in code, when I originally added the button to my NIB in Interface Builder.  I know how to change the background in Interface Builder.. but I want to change it in code, so I can change it automagically.</p>