Using External Displays

Last Revision:	Version 1.1, 2013-09-16 Modernized for iOS 6 and 7. (Full Revision History)
Build Requirements:	iOS 7.0 SDK, Xcode 5.0.
Runtime Requirements:	iOS 6.0 or later

How to detect the presence of an external display, determine the available display resolutions, select a resolution, and show content on the display.