Steps:
1. Create an instance to the pinch gesture class
2. Create a function that performs action
3. Add the gesture recogniser to the created instance
self.imageViews.addGestureRecognizer(UIPinchGestureRecognizer(target: self, action: #selector(self.pinchAction(gesture:))))
//Creating a function for pinch act
@objc func pinchAction(gesture:UIPinchGestureRecognizer)
{
if let ges = gesture.view
{
ges.transform = ges.transform.scaledBy(x: gesture.scale, y: gesture.scale)
gesture.scale = 1
}
}
