Custom Segue Implementation

import UIKit

class SlideOverSegue: UIStoryboardSegue {

    override func perform() {
        let firstView = self.sourceViewController.view as UIView!
        let secondView = self.destinationViewController.view as UIView!
        let screenSize = UIScreen.mainScreen().bounds.size
        let window = UIApplication.sharedApplication().keyWindow

        secondView.frame = CGRectMake(0.0, screenSize.height, screenSize.width, screenSize.height)
        window?.insertSubview(secondView, aboveSubview: firstView)

        firstView.layer.anchorPoint = CGPoint(x: 0.0, y: 0.0)
        firstView.layer.position = CGPoint(x: 0.0, y: 0.0)

        UIView.animateWithDuration(2, delay: 0, options: .CurveEaseInOut, animations: {

            print(firstView.frame)

            let offset: CGFloat = 25
            let offsetX = 2 * (offset / firstView.frame.width)
            let offsetY = 2 * (offset * (firstView.frame.height / firstView.frame.width) / firstView.frame.height)

            let transform = CGAffineTransformScale(CGAffineTransformIdentity, 1 - offsetX, 1 - offsetY)
            firstView.transform = transform
            firstView.layer.position = CGPoint(x: offset, y: offset)

        }, completion: nil)

        UIView.animateWithDuration(5, delay: 0.05, options: .CurveEaseOut, animations: {

            secondView.frame = CGRectMake(0.0, 0.0, screenSize.width, screenSize.height)

            }) { finished -> Void in
                self.sourceViewController.presentViewController(self.destinationViewController, animated: false, completion: nil)
        }
    }

}