iOS Swift: A PushDissolveAnimationSegue with a dissolve animation,

PushDissolveAnimationSegue.swift

class PushDissolveAnimationSegue: UIStoryboardSegue {
    
    override func perform() {
        let transition = CATransition()
        
        transition.duration = 0.2
        transition.type = kCATransitionFade
        
        self.sourceViewController.navigationController!.view.layer.addAnimation(transition, forKey: kCATransition)
        self.sourceViewController.navigationController!.pushViewController(self.destinationViewController, animated: false)
        
        //        No animation below
        //        if let navigation = sourceViewController.navigationController {
        //            navigation.pushViewController(destinationViewController, animated: false)
        //        }
    }
    
}