How to know the current scale of a UIView?
ios, objective-c, scale, uiview, zooming
Solution
If you're applying a scale transform to your view, that transform will be available (appropriately enough) through the `transform` property on UIView. According to the CGAffineTransform docs, scale transforms will have nonzero values at coordinates (1,1) and (2,2) in the transform matrix; you can therefore get your x- and y-scale factors by doing:
CGFloat xScale = view.transform.a;
CGFloat yScale = view.transform.d;
Problem
How do you find the current scale (zoom level) of a `UIView`?