// create viewcontroller
let storyboard = UIStoryboard(storyboard: .Main)
let detail: DetailViewController = storyboard.instantiateViewController()

// configure transition    
detail.transitioningDelegate = self
detail.modalPresentationStyle = .Custom

// present viewController    
navigationController?.presentViewController(detail, animated: true, completion: nil)

// MARK: transition delegate
extension ViewController: UIViewControllerTransitioningDelegate {

  func animationControllerForPresentedController(presented: UIViewController,
                           presentingController presenting: UIViewController,
                                   sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {

    return ScaleShowTransition(duration: 0.5, scale: 0.9)
  }


  func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
    return ScaleHideTransition(duration: 0.5, scale: 0.9)
  }
}