NavigationController.pushViewController in Custom Segue does not work - Swift 2.0 - iOS 9.1

Question

I'm writing a custom segue in UIStoryboardSegue. I use a CATransition to create a right to left custom animation. If I used sourceViewController.navigationController?.pushViewController(destinationViewController, animated: false);, it does not take me to the second view. It just performs the right to left animation and stays on the first view. I have debugged this code, and I found that sourceViewController.navigationController is nil. I have a UINavigationController between the first view and the second view.

I have also tried to replace this line of code with sourceViewController.presentViewController(destinationViewController, animated: false, completion: nil);. The transition does happen, but it happens too fast that I can't see the right to left animation.

My complete code in this UIStoryboardSegue is the following:

override func perform() {


    let sourceViewController = self.sourceViewController as UIViewController;
    let destinationViewController = self.destinationViewController as UIViewController;
    let transition: CATransition = CATransition()

    transition.duration = 0.25;
    transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
    transition.type = kCATransitionPush;
    transition.subtype = kCATransitionFromRight;

    sourceViewController.view.layer.addAnimation(transition, forKey: "kCATransition")

    sourceViewController.navigationController?.pushViewController(destinationViewController, animated: false);
}

Thank you very much for your help

Answer 1

Using sourceViewController.pushViewController is correct. The reason that I was getting nil for the sourceViewController.navigationController was that, I placed the navigation controller between the first view and the second view. The correct way of placing the navigation controller is to place it before the first view.