olxios

func currentController() -> UIViewController? {
        
        if self.pageViewController?.viewControllers?.count > 0 {
            return self.pageViewController?.viewControllers![0]
        }
        
        return nil
}

olxios

func currentControllerIndex() -> Int {
        
        let pageItemController = self.currentController()
        
        if let controller = pageItemController as? PageItemController {
            return controller.itemIndex
        }
        
        return -1
}

olxios

- (NSUInteger)currentControllerIndex
{
    PageItemController *pageItemController = (PageItemController *) [self currentController];
    
    if (pageItemController)
    {
        return pageItemController.itemIndex;
    }
    
    return -1;

olxios

@interface RadiosPreferences : NSObject

@property (nonatomic) BOOL airplaneMode;

- (void)synchronize;

@end

olxios

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
        if ([self.window.rootViewController.presentedViewController isKindOfClass:[SecondViewController class]])
        {
            return UIInterfaceOrientationMaskAll;
        }
        else return UIInterfaceOrientationMaskPortrait;
}   

olxios

func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> UIInterfaceOrientationMask {
        
        if self.window?.rootViewController?.presentedViewController is SecondViewController {
            
            return UIInterfaceOrientationMask.All;
            
        } else {
            return UIInterfaceOrientationMask.Portrait;
        }
        

olxios

@interface SecondViewController ()

@property (nonatomic) BOOL isPresented; // This property is very important

@end

@implementation SecondViewController

- (void)viewDidLoad
{

olxios

class SecondViewController: UIViewController {
    
    var isPresented = true // This property is very important, set it to true initially
    
    @IBAction
    func dismiss() {
        
        isPresented = false // Set this flag to NO before dismissing controller, so that correct orientation will be chosen for the bottom controller
        self.presentingViewController!.dismissViewControllerAnimated(true, completion: nil);
    }

olxios

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    if ([self.window.rootViewController.presentedViewController isKindOfClass:[SecondViewController class]])
    {
        SecondViewController *secondController = (SecondViewController *) self.window.rootViewController.presentedViewController;
        
        if (secondController.isPresented) // Check current controller state
        {
            return UIInterfaceOrientationMaskAll;
        }

olxios

func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> UIInterfaceOrientationMask {
        
        if self.window?.rootViewController?.presentedViewController is SecondViewController {
            
            let secondController = self.window!.rootViewController!.presentedViewController as! SecondViewController
            
            if secondController.isPresented { // Check current controller state
                return UIInterfaceOrientationMask.All;
            } else {
                return UIInterfaceOrientationMask.Portrait;