How to know the current scale of a UIView?

Question

How do you find the current scale (zoom level) of a UIView?

Answer 1

According to this source, using this method gives you the scale regardless of rotation or translation applied to transform:

func scale(from transform: CGAffineTransform) -> Double {
    return sqrt(Double(transform.a * transform.a + transform.c * transform.c));
}

I know I am late to the party but the accepted answer didn't work in my case.