NSWindowControllers Are View-Controllers

NSWindowController is a view-controller class. Its main job is to own and manage the view objects that are used to display and edit a document. A document that is visible to the user has one or more NSWindowControllers to own and manage the visual presentation. Although you can use an NSWindowController instance, most often you must subclass NSWindowController to add specific knowledge of the interface. An NSWindowController usually gets its interface from a nib file. Subclasses often add outlets and actions for the controls and views within the nib file and the NSWindowController usually acts as the "File's Owner" for the nib. In very simple cases where there is only one window for a document, you may want your NSDocument class to have outlets and actions for the nib. In this case, the NSDocument subclass acts as the "File's Owner" for the nib, but it still creates an NSWindowController to own and manage the objects that are loaded from the nib.

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