NSObject and NSObjectController

Discussion in 'Mac Programming' started by Sergio10, Mar 29, 2009.

  1. macrumors regular

    Oct 3, 2007

    What is the difference between NSObject and NSObjectController?


  2. macrumors 6502a

    Oct 13, 2007
    In InterfaceBuilder a NSObject item is tied to a single instance of an object and will instantiate that object when the nib is being awoken, whereas a NSObjectController is more of a generic pointer at an object of a certain type. NSObjectControllers do not cause anything to be instantiated just by being in a nib, but point at nil unless tied to something.

    A way of illustrating this is when you have a an NSObjectController pointing at a NSArrayController pointing at "selectedObject". When the selected object changes that NSObjectController now points at a different object, but the objects themselves have not changed.

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