How to make UIToolbar have a Clear Background?

Question

I have a UIToolbar that has a white tint, with a bar button item, followed by some flexible space, followed by another bar button item. I would like to make the toolbar complete

Answer 1

Hacky, sorry, but the only way I've found so far that reliably works in both iOS 7 and iOS 6 is to do this:

[[toolbar.subviews objectAtIndex:0] removeFromSuperview];