Extension for UINavigationController for custom transitions

UINavigationControllerTransitions.swift

extension UINavigationController {

    /// Push the view controller with present animation
    ///
    /// - Parameters:
    ///   - viewController: The view controller
    ///   - animationDuration: The animation duration (default 0.25)
    func pushPresentViewController(viewController: UIViewController, duration: CFTimeInterval = 0.25) {
        let transition = CATransition()
        transition.duration = duration
        transition.type = .moveIn
        transition.subtype = .fromTop
        self.view.layer.add(transition, forKey: kCATransition)
        self.pushViewController(viewController, animated: false)
    }

    /// Pop the view controller with dismiss animation
    ///
    /// - Parameters:
    ///   - animationDuration: The animation duration (default 0.25)
    func popDismissViewController(duration: CFTimeInterval = 0.25) {
        let transition = CATransition()
        transition.duration = duration
        transition.type = .reveal
        transition.subtype = .fromBottom
        self.view.layer.add(transition, forKey: kCATransition)
        self.popViewController(animated: false)
    }
}