Tinder Swipe Effect For IOS8 (SWIFT)

Tinder Swipe(IOS8)

        //Global Variables
       var alphaX : CGFloat = 0
       var orgState : CGPoint = CGPoint()
       override func viewDidLoad() {
        super.viewDidLoad()
        //Adding the Label
        var label: UILabel = UILabel(frame: CGRectMake(self.view.bounds.width/2 - 100 , self.view.bounds.height/2 - 50, 200, 100))
        orgState = label.center
        label.text = "Drag Me!"
        label.textAlignment = NSTextAlignment.Center
        self.view.addSubview(label)
        
        //Attaching Gesture Recognition to Label
        var gesture = UIPanGestureRecognizer(target: self, action: Selector("wasDragged:"))
        label.addGestureRecognizer(gesture)
        
        label.userInteractionEnabled = true
            }

    func wasDragged(gesture : UIPanGestureRecognizer){
        //Vector Translations
        let translation = gesture.translationInView(self.view)
        alphaX += (translation.x * 3.14/180)
        var label = gesture.view!
        label.center = CGPoint(x: label.center.x + translation.x, y: label.center.y + translation.y)
        gesture.setTranslation(CGPointZero, inView: self.view)
        
        //Transformations
        var transformVar = min(abs(2/* size/speed factor decimal *//alphaX ),1)
        var rotation:CGAffineTransform = CGAffineTransformMakeRotation(alphaX/9)
        var scale: CGAffineTransform = CGAffineTransformScale(rotation, transformVar,transformVar)
        label.transform = scale
        gesture.view!.alpha = 1-(min(abs(alphaX/10),1))
        
        //StateCheck
        
        if gesture.state==UIGestureRecognizerState.Ended {
            
            if label.center.x < 100 {
                
                println("Not Chosen")
                //refresh view/change image
                
            } else if label.center.x > self.view.bounds.width - 90 {
                
                println("Chosen")
                //refresh view/change image
                
            } else {
                
                UIView.animateWithDuration(0.3, animations: { () -> Void in
                    
                    label.center = self.orgState
                    
                    label.transform = CGAffineTransformIdentity
                    
                })
                
            }
            
        }
    }