Background in an iPhone Quartz CAAnimation

Question

Whenever I am using a quartz animation the background of the animation is white. How can I change this to be a different color. This is the code I am using to produce the animation

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];

[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:superview cache:YES];
[superview addSubview:backview];
[defaultview removeFromSuperview];
[UIView commitAnimations];

Answer 1

I think the background color for these transitions is the same as the background color of your app's one UIWindow object - its main window.

You can set this color in the nib file, usually called MainWindow.xib, using interface builder.

You can also set this programmatically, such as in the applicationDidFinishLaunching: method of your app delegate object, via something like this:

UIColor* myColor = [UIColor blackColor];  // Or any other color you want.
[window setBackgroundColor:myColor];

By the way, you can also set this "color" to be an image using a method such as colorWithPatternImage:, one of the convenience constructors of UIColor.

Reference: a previous question on the flipping views background color.