NSIntersectionRect(_:_:)
Calculates the intersection of two rectangles.
Declaration
func NSIntersectionRect(_ aRect: NSRect, _ bRect: NSRect) -> NSRectReturn Value
The graphic intersection of aRect and bRect. If the two rectangles don’t overlap, the returned rectangle has its origin at (0.0, 0.0) and zero width and height (including situations where the intersection is a point or a line segment).