Question

I know that I can return YES to support Landscape mode in shouldAutorotateToInterfaceOrientation. But I would like to display a new view, when the user turn the device into landscape mode, how can I do so? thank you.

Answer 1

Observer this event UIDeviceOrientationDidChangeNotification

[[NSNotificationCenter defaultCenter] addObserver:self 
           selector:@selector(orientationDidChange:)
           name:UIDeviceOrientationDidChangeNotification object:nil];