ViewController

// Main ViewController

import UIKit
import SafariServices

class ViewController: UIViewController, SFSafariViewControllerDelegate, UIViewControllerTransitioningDelegate {

    let transitionManager : HelloTransition = HelloTransition()
    
    @IBAction func showSafariViewController(sender: AnyObject){
        
        let safariViewController = IDMSafariViewController(URL: NSURL(string: "http://idreamcode.com")!)
        safariViewController.delegate = self;
        safariViewController.transitioningDelegate = self.transitionManager
        safariViewController.modalPresentationStyle = UIModalPresentationStyle.Custom
        self.transitionManager.transitionTo = kToSAFARIVC
        self.presentViewController(safariViewController, animated: true) { () -> Void in
            let recognizer = UIScreenEdgePanGestureRecognizer(target: self, action: "handleGesture:")
            recognizer.edges = UIRectEdge.Left
            safariViewController.edgeView?.addGestureRecognizer(recognizer)
        }
    }
    
    func handleGesture(recognizer:UIScreenEdgePanGestureRecognizer) {
        switch recognizer.state {
        case .Began: ()
        case .Changed:dismissViewControllerAnimated(true, completion: nil)
        case .Ended, .Cancelled:
            (recognizer.velocityInView(view).x < 0) ? () :
            dismissViewControllerAnimated(true, completion: nil)
        default: ()
        }
    }

    func safariViewControllerDidFinish(controller: SFSafariViewController)
    {
        controller.dismissViewControllerAnimated(true, completion: nil)
    }
}