Document Revision History

This table describes the changes to UIButton Class Reference.

Date	Notes
2012-09-19	Added a new interfaces related to styled-text support in iOS 6.
2011-10-12	Updated for iOS 5.0.
2009-09-09	Clarified descriptions of the `contentEdgeInsets`, `titleEdgeInsets`, and `imageEdgeInsets` properties.
	Other minor improvements.
2009-04-23	Updated for iOS 3.0.
	Added descriptions for the `titleLabel` and `imageView` properties. Minor corrections.
2008-05-23	New document that describes the class used to implement buttons on the touch screen.

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