Applying scaling and rotation on a view using CGAffineTransform

Question

So I need to apply some scaling and some rotation to a view (I do this using gestures), so for each gesture I update the current scalling and rotation values with something

Answer 1

For swift 3:

view.transform = CGAffineTransform(rotationAngle:  CGFloat.pi).concatenating(CGAffineTransform(scaleX: 0.4, y: 0.4))