Control Rotation and Allow for Only One View

AppDelegate.m

// this delegate is executed before each rotation.  Here we allow only one view to go to landscape
- (NSUInteger) application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    // get the array of VCs from the nav controller
    UINavigationController *navControl = (UINavigationController*)self.window.rootViewController;
    NSArray *controllerArray =  navControl.viewControllers;
    NSUInteger controllerCount = [controllerArray count];
    
    // safety check, make sure we have at least one view controller on the stack
    if (controllerCount > 0) {
        // get the last view controller on the stack
        UIViewController *lastController = [controllerArray objectAtIndex:(controllerCount-1)];
        // make sure it matches the class we want to allow rotation
        if ([lastController isKindOfClass:[CCJVideoPlayerVC class]])
        {
            // get a local copy so we can check it's status
            CCJVideoPlayerVC *lvtvc = (CCJVideoPlayerVC*)lastController;
            if (lvtvc.isPresented) {
                // NSLog(@"The returned mask is UIInterfaceOrientationMaskAll");
                return UIInterfaceOrientationMaskAll;
            } else {
                // NSLog(@"The returned mask is UIInterfaceOrientationMaskPortrait");
                return UIInterfaceOrientationMaskPortrait;
            }
            
        } else {
            // all other views
            return UIInterfaceOrientationMaskPortrait;
        }
        
    } else {
        NSLog(@"CATCH: no view controllers in AppDelegate:supportedInterfaceOrientationsForWindow");
        return UIInterfaceOrientationMaskPortrait;
    }
}