Interactive Transition With Push Segue Not Working (Swift) - ios

Question

I'm lost in the universe of the transitions. I want an interactive transition with a push segue. The following code works with a modal segue, but not with a push one :
(With a push segue, the animation is not interactive and is reversed)
FirstViewController.swift
let transitionManager = TransitionManager()
override func viewDidLoad() {
super.viewDidLoad()
transitionManager.sourceViewController = self
// Do any additional setup after loading the view.
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
let dest = segue.destinationViewController as UIViewController
dest.transitioningDelegate = transitionManager
transitionManager.destViewController = dest
}
TransitionManager.swift
class TransitionManager: UIPercentDrivenInteractiveTransition,UIViewControllerAnimatedTransitioning, UIViewControllerTransitioningDelegate,UIViewControllerInteractiveTransitioning {
var interactive = false
var presenting = false
var panGesture : UIPanGestureRecognizer!
var destViewController : UIViewController!
var sourceViewController : UIViewController! {
didSet {
panGesture = UIPanGestureRecognizer(target: self, action: "gestureHandler:")
sourceViewController.view.addGestureRecognizer(panGesture)
}
}
func gestureHandler(pan : UIPanGestureRecognizer) {
let translation = pan.translationInView(pan.view!)
let velocity = pan.velocityInView(pan.view!)
let d = translation.x / pan.view!.bounds.width * 0.5
switch pan.state {
case UIGestureRecognizerState.Began :
interactive = true
sourceViewController.performSegueWithIdentifier("1to2", sender: self)
case UIGestureRecognizerState.Changed :
self.updateInteractiveTransition(d)
default :
interactive = false
if d > 0.2 || velocity.x > 0 {
self.finishInteractiveTransition()
}
else {
self.cancelInteractiveTransition()
}
}
}
func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
// create a tuple of our screens
let screens : (from:UIViewController, to:UIViewController) = (transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)!, transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)!)
let container = transitionContext.containerView()
let toView = screens.to.view
let fromView = screens.from.view
toView.frame = CGRectMake(-320, 0, container.frame.size.width, container.frame.size.height)
container.addSubview(toView)
container.addSubview(fromView)
let duration = self.transitionDuration(transitionContext)
// perform the animation!
UIView.animateWithDuration(duration, delay: 0.0, usingSpringWithDamping: 0.7, initialSpringVelocity: 0.8, options: nil, animations: {
toView.frame.origin = container.frame.origin
fromView.frame.origin = CGPointMake(320, 0)
}, completion: { finished in
if(transitionContext.transitionWasCancelled()){
transitionContext.completeTransition(false)
UIApplication.sharedApplication().keyWindow.addSubview(screens.from.view)
}
else {
transitionContext.completeTransition(true)
UIApplication.sharedApplication().keyWindow.addSubview(screens.to.view)
}
})
}
func transitionDuration(transitionContext: UIViewControllerContextTransitioning) -> NSTimeInterval {
return 1
}
// MARK: UIViewControllerTransitioningDelegate protocol methods
func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
self.presenting = true
return self
}
func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
self.presenting = false
return self
}
func interactionControllerForPresentation(animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
return self.interactive ? self : nil
}
func interactionControllerForDismissal(animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
return self.interactive ? self : nil
}
}
Storyboard
The segue is from the FirstViewController to the SecondViewController.
Identifier : "1to2"
Segue : Push
Destination : Current
Thanks for your help