Question: I have 2 views which transition into each other using the ...

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> [UIView setAnimationTransition:UIAnimationTransitionFlipFromLeft forView:self.view cache:YES]
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My views both have a black background and when they flip over the colour underneath is white. I want to change this to something else. How do I do this? I have tried searching but I am not really sure which search terms to use.

Answer: 
I think what you are looking for is changing the background color of your application window (which is visible between the flipside views). You can do this 

* either in the Interface Builder in the MainWindow.xib, Tab 1 of the Inspector
* or in code with 

window.backgroundColor = [UIColor redColor];
thanks! Very anti-intuitive. I'd think the superview's background color would show but I'd be wrong ;)