Simple sliding transitioning for navigation controller mimics pre iOS7 push/pop animations.All you need, is simply set delegate for you navigation controller: self.navigationController.delegate = self.navigationTransitioningDelegate;NavigationController does not retain delegate, so you should hold it. Note: this code is free. Ported from https:/…

ClassicalNavigationAnimationController.swift

import Foundation
import UIKit

class ClassicalNavigationAnimationController: NSObject, UIViewControllerAnimatedTransitioning {
    let DEFAULT_TRANSITION_DURATION: TimeInterval = 0.3
    
    var reverse: Bool = false
    
    init(withReverse reverse: Bool) {
        self.reverse = reverse
        
        super.init()
    }
    
    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return DEFAULT_TRANSITION_DURATION
    }
    
    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        guard let fromController = transitionContext.viewController(forKey: .from),
              let toController = transitionContext.viewController(forKey: .to) else
        {
            return
        }

        let containerView = transitionContext.containerView
        
        let duration: TimeInterval = self.transitionDuration(using: transitionContext)
        let viewWidth = containerView.frame.width
        
        var fromViewFrame = fromController.view.frame
        var toViewFrame = toController.view.frame
        
        toViewFrame.origin.x = self.reverse ? -viewWidth : viewWidth
        toController.view.frame = toViewFrame
        containerView.addSubview(toController.view)
        
        UIView.animate(withDuration: duration, delay: 0.0, options: .curveEaseInOut, animations: { 
            toViewFrame.origin.x = containerView.frame.minX
            fromViewFrame.origin.x = self.reverse ? viewWidth : -viewWidth
            toController.view.frame = toViewFrame
            fromController.view.frame = fromViewFrame
        }) { (finished) in
            if self.reverse {
                fromController.view.removeFromSuperview()
            }
            
            transitionContext.completeTransition(!transitionContext.transitionWasCancelled)
        }
    }
}

ClassicalTransitionDelegate.swift

import Foundation
import UIKit

/**
 * Idea of this class came after reading this thread:
 * http://stackoverflow.com/questions/18867248/restore-pre-ios7-uinavigationcontroller-pushviewcontroller-animation
 * and this gist: https://gist.github.com/ArtFeel/7690431
 * It implements Simple sliding transitioning for navigation controller mimics pre iOS7 push/pop animations.
 * All you need, is simply set delegate for you navigation controller.
 */
class ClassicalTransitionDelegate : NSObject, UINavigationControllerDelegate {
    var pushTransactioning: UIViewControllerAnimatedTransitioning!
    var popTransactioning: UIViewControllerAnimatedTransitioning!
    
    override init() {
        self.pushTransactioning = ClassicalNavigationAnimationController(withReverse: false)
        self.popTransactioning = ClassicalNavigationAnimationController(withReverse: true)
        
        super.init()
    }
    
    func navigationController(_ navigationController: UINavigationController,
                              animationControllerFor operation: UINavigationControllerOperation,
                              from fromVC: UIViewController,
                              to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning?
    {
        return operation == .pop ? self.popTransactioning : self.pushTransactioning
    }
}