BHMenuTransitionAnimatorPart1.swift

class BHMenuTransitionAnimator: NSObject , UIViewControllerAnimatedTransitioning  {
  
  var fromViewController : UIViewController!
  
  init(fromViewController vc  : UIViewController ) {
    super.init()
    self.fromViewController = vc
  }
  
  func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
    return 0.33
  }
  
}