windowNibName
The name of the nib file that stores the window associated with the receiver.
Declaration
var windowNibName: NSNib.Name? { get }Discussion
If init(windowNibPath:owner:) was used to initialize the instance, windowNibName contains the last path component with the “.nib” extension stripped off. If init(windowNibName:) or init(windowNibName:owner:) was used, NSWindowController contains the name without the “.nib” extension.