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    <p>I've implemented this exact type of behavior on an app and the key is to make sure that any parent controllers implement shouldAutorotateToInterfaceOrientation and that your current view controller also implements it. In my case I am using a tab controller which intercepts the call to shouldAutorotateToInterfaceOrientation and I had to override the tab controller to get the call to fall through. The default behavior of view controllers is to display in portrait mode only.</p> <p>So you need to force them to allow all orientation changes through: -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; }</p> <p>Then in order to load a new view controller you should respond to:</p> <pre><code>- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation { if((fromInterfaceOrientation == UIInterfaceOrientationPortrait) || (fromInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown)) { // Load the view controller you want to display in landscape mode... } } </code></pre> <p>and can also use: </p> <pre><code>-(void)willAnimateFirstHalfOfRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration </code></pre> <p>To detect that the orientation change is coming.</p> <p>In my case I am using didRotateFromInterfaceOrientation to check if the last orientation was portrait and if so load the view I want displayed in landscape mode.</p> <p>I then implemented the same methods in the viewcontroller I am loading and it is responsible for detecting when the orientation changes back to portrait and dismissing itself from the view stack.</p> <p>Hope that helps a little.</p> <p>Paul</p>
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    1. CODo I need to subclass the initial tabBarController to add the shouldAutorotateToInterfaceOrientation method to it? This tabBar Controller has been setup using IB and a few lines a code in the application delegate. I have followed all of the steps, but didRotateFromInterfaceOrientation is not called.
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      1. USMassimo Cafaro
    2. COOk, I subclassed the tabBarController, adding shouldAutorotateToInterfaceOrientation and now everything works. Thank you very much for your help. Kind regards.
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    3. COI prefer not using UITabBarController at all and instead using a UIViewController with a UITabBar.
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      1. USmk12
 

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