Unfortunately, UIKit doesn't use the well-thought-out NSImage class, opting instead to reimplement it by way of UIImage. In this case, the GP is correct: NSIma

Unfortunately, UIKit doesn't use the well-thought-out NSImage class, opting instead to reimplement it by way of UIImage. In this case, the GP is correct: NSImage is part of the UI toolkit (AppKit); it is not a core API exposed by, say, Foundation.