UIView animation -- horizontal page curl... like a book?

I'm pretty sure I've run across this animation at some point, but I can't remember where or how to do it!

I want the equivalent of UIView开发者_JS百科AnimationTransitionCurlDown but a full page horizontal curl. Does anybody have code that does this?

Thanks!

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According to the Apple Documentation, it does not exist: http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIView_Class/UIView/UIView.html#//apple_ref/c/tdef/UIViewAnimationTransition

Not sure whether this helps: iPhone Curl Left and Curl Right transitions

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You could write your own or use the one Claus suggested but there is no UIViewAnimationCurlHorizontal.