title: What is the correct way to tell when an NSArrayController is finished loading its content from a persistent store?
body: <p>What's the best way to know when my array controller that is bound to my core data store is done loading its content?  </p>
  
  <p>I've got some methods (i.e. awakeFromNib) that rely on the array controller having its content, but most of the time the array controller doesn't have its content yet when awakeFromNib is being called on that object.  </p>
  
  <p>I want to delay my actions until I know the controller has all of its content.</p>