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copied!<p>From the <a href="http://developer.apple.com/library/ios/#samplecode/ExternalDisplay/Listings/Classes_ExternalDisplayViewController_m.html#//apple_ref/doc/uid/DTS40010724-Classes_ExternalDisplayViewController_m-DontLinkElementID_6" rel="nofollow">ExternalDisplay</a> sample code in the iOS Developer Library:</p> <blockquote> <p>To display content on an external display, do the following:</p> <ol> <li><p>Use the screens class method of the UIScreen class to determine if an external display is available.</p></li> <li><p>If an external screen is available, get the screen object and look at the values in its availableModes property. This property contains the configurations supported by the screen.</p></li> <li><p>Select the UIScreenMode object corresponding to the desired resolution and assign it to the currentMode property of the screen object.</p></li> <li><p>Create a new window object (UIWindow) to display your content.</p></li> <li><p>Assign the screen object to the screen property of your new window.</p></li> <li><p>Configure the window (by adding views or setting up your OpenGL ES rendering context).</p></li> <li><p>Show the window.</p></li> </ol> </blockquote> <p>Looking at the sample code you would have two <code>UIWindow</code> objects, each displays the views that would would like to show on that given display. So you could have a <code>UIViewController</code> with a flag <code>isExternalScreen</code>, and when true it would not show the certain views.</p>

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