New in beta 3, coordinate spaces are a UIScreen property. There’s a UICoordinateSpace protocol for UIViews and APIs to support point conversion, presumably for split-screen app development.
UIScreen.h
Added UIScreen.coordinateSpace
Added UIScreen.fixedCoordinateSpace
UIView.h
Added UICoordinateSpace
Added UICoordinateSpace.bounds
Added -[UICoordinateSpace convertPoint:fromCoordinateSpace:]
Added -[UICoordinateSpace convertPoint:toCoordinateSpace:]
Added -[UICoordinateSpace convertRect:fromCoordinateSpace:]
Added -[UICoordinateSpace convertRect:toCoordinateSpace:]
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