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    <p>Actually the interface of the Youtube does not really rotate, they just present the video layer full screen and rotate the layer. </p> <p>The same think happens when you rotate the device, they make the video layer fill the screen and rotate it according to the device rotation. Facebook does the same when viewing photo fullscreen and rotating the device just rotates the view.</p> <p>You can start monitoring the rotation by asking <code>UIDevice</code> to generate device notation orientation notifications:</p> <pre><code>[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:[UIDevice currentDevice]]; </code></pre> <p>Then in the <code>-(void)orientationChanged:</code> method change the UI:</p> <pre><code>- (void) orientationChanged:(NSNotification *)note { UIDevice * device = note.object; CGAffineTransform transfrom; CGRect frame = self.videoView.frame; switch(device.orientation) { case UIDeviceOrientationPortrait: case UIDeviceOrientationPortraitUpsideDown: transfrom = CGAffineTransformIdentity; frame.origin.y = 10.0f; frame.origin.x = 10.0f; frame.size.width = [UIScreen mainScreen] bounds].size.width; frame.size.height = 240.0f; break; case UIDeviceOrientationLandscapeLeft: transfrom = CGAffineTransformMakeRotation(degreesToRadians(90)); frame.origin.y = 0.0f; frame.origin.x = 0.0f; frame.size.width =[UIScreen mainScreen] bounds].size.height; frame.size.height =[UIScreen mainScreen] bounds].size.width; break; case UIDeviceOrientationLandscapeRight: transfrom = CGAffineTransformMakeRotation(degreesToRadians(-90)); frame.origin.y = 0.0f; frame.origin.x = 0.0f; frame.size.width =[UIScreen mainScreen] bounds].size.height; frame.size.height =[UIScreen mainScreen] bounds].size.width; break; default: return; break; }; [UIView animateWithDuration:0.3f animations: ^{ self.videoView.frame = frame; self.videoView.transform = transfrom; }]; } </code></pre> <p><strong>This code is written without testing and is only here to give you an idea of how it can be doen.</strong></p>
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    1. POHow to change a orientation on button click like youTube app?
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    1. COhave you any idea how to do it?
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    2. COWhen I rotate the device, the view is rotating but on button click how to rotate a view i don't know.
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