Open animation for image in UITableView in swift - ios

Question

I have a UITableView with some label and images on it.
And I want to show image fullscreen when user tap on image.
I'am trying to achieve animation effect like when you tap on images on twitter account.
I've tried two days, but i couldn't find desire effect. This is my code right now :
func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
println("animating transition")
var containerView = transitionContext.containerView()
var toViewController = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)!
var fromViewController = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)!
var window = UIApplication.sharedApplication().keyWindow
var imageCenter = imageViewToSegue.center
var frame = window.convertRect(imageViewToSegue.frame, fromView: fromView)
var www = imageViewToSegue.image?.size.width
var hhh = imageViewToSegue.image?.size.height
var index = www! / self.view.frame.width
if (isPresenting) {
var copyImageView = UIImageView(frame: imageViewToSegue.frame)
copyImageView.frame.origin = view.convertPoint(imageViewToSegue.frame.origin, fromView: fromView)
copyImageView.image = imageViewToSegue.image
copyImageView.contentMode = imageViewToSegue.contentMode
copyImageView.clipsToBounds = true
copyImageView.userInteractionEnabled = true
window.addSubview(copyImageView)
containerView.addSubview(toViewController.view)
toViewController.view.alpha = 0
if let vc = toViewController as? ImageViewController {
vc.imageView.hidden = true
}
UIView.animateWithDuration(0.4, animations: { () -> Void in
copyImageView.frame = CGRect(x: 0, y: (self.view.bounds.height / 2) - ( hhh!/(index * 2)), width: www!/index , height: hhh!/index)
toViewController.view.alpha = 1
}) { (finished: Bool) -> Void in
copyImageView.removeFromSuperview()
if let vc = toViewController as? ImageViewController {
vc.imageView.hidden = false
}
transitionContext.completeTransition(true)
}
} else {
let vc = fromViewController as ImageViewController
var copyImageView = UIImageView(frame: vc.imageView.frame)
copyImageView.frame = CGRect(x: 0, y: (self.view.bounds.height / 2) - ( hhh!/(index * 2)), width: www!/index , height: hhh!/index)
copyImageView.image = imageViewToSegue.image
copyImageView.contentMode = imageViewToSegue.contentMode
copyImageView.clipsToBounds = true
copyImageView.userInteractionEnabled = true
window.addSubview(copyImageView)
vc.imageView.hidden = true
UIView.animateWithDuration(0.4, animations: { () -> Void in
fromViewController.view.alpha = 0
copyImageView.frame = frame
}) { (finished: Bool) -> Void in
copyImageView.removeFromSuperview()
transitionContext.completeTransition(true)
fromViewController.view.removeFromSuperview()
}
}
}