iOS Zoom bounce effect

-(void)pinchGestureRecognized:(UIPinchGestureRecognizer*)recognizer
{
        if (recognizer.state == UIGestureRecognizerStateBegan) {
            lastScale = recognizer.scale;
        }
    
        if (recognizer.state == UIGestureRecognizerStateBegan || recognizer.state == UIGestureRecognizerStateChanged)
        {
            CGFloat currentScale = [[recognizer.view.layer valueForKeyPath:@"transform.scale"] floatValue];
    
            const CGFloat kMinScale = 0.75;
            const CGFloat kMaxScale = 1.00;
    
            CGFloat newerScale = 1 - (lastScale - recognizer.scale);
            newerScale = MIN(newerScale, kMaxScale/currentScale);
            newerScale = MAX(newerScale, kMinScale/currentScale);
            CGAffineTransform transform = CGAffineTransformScale(recognizer.view.transform, newerScale, newerScale);
            recognizer.view.transform = transform;
    
            lastScale = recognizer.scale;
        }
}