From the documentation: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIView_Class/UIView/UIView.html http://developer.apple.com/library

From the documentation: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIView_Class/UIView/UIView.html http://developer.apple.com/library/ios/#documentation/uikit/... Use of this method is discouraged in iOS 4.0 and later. You should use the block-based animation methods instead. Frankly, it's because I can't remember the block based methods off the top of my head yet.