How to maintain presenting view controller's orientation when dismissing modal view controller?

Question

I have this app I am working on and I need ALL my view controllers but one to be in portrait. The single one view controller that is special I need it to be able to rotate t

Answer 1

This is actually easier and can be done without any additional properties (here's an example with AVPlayerViewController):

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
        if ([self.window.rootViewController.presentedViewController isKindOfClass: [AVPlayerViewController class]])
            return self.window.rootViewController.presentedViewController.isBeingDismissed ? 
            UIInterfaceOrientationMaskPortrait : UIInterfaceOrientationMaskAll;
        else
            return UIInterfaceOrientationMaskPortrait;
    } else {
        return UIInterfaceOrientationMaskAll;
    }
}