Converts a size from the view’s coordinate system to that of another view.
- macOS 10.0+
The size (width and height) in the view's coordinate system.
The view that is the target of the conversion operation. Both
aand the view must belong to the same
NSWindowobject, and that window must not be
nil, this method converts to window coordinates instead.
The converted size, as an
NSSize values are always forced to have positive a width and height.