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NSWindowController for Prefs XIB Question (Core Data involved)
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NSWindowController for Prefs XIB Question (Core Data involved)


  • Subject: NSWindowController for Prefs XIB Question (Core Data involved)
  • From: Steve Cronin <email@hidden>
  • Date: Thu, 20 May 2010 22:08:46 -0500

Folks;

I have a feeling that this is an embarrassing one so try and go easy on me…
XC 3.2.2

I have a main nib that opens a window and that works fine.
I used to have an NSPanel in this nib to handle preferences.
I've decided it's a good idea to split the nib into two different nibs: the main nib and a preferences nib.

I've looked over the Sketch project and used it as a model.
I've also read over the Document-Based App Overview FAQ

I've added a window nib to the project and then subclassed a NSWindowController.
I've made the xib's files owner this window controller
At this point I can get a simple empty window to open just fine.

However, I'm using CoreData and I want to pass the existing MOC to the pref window:
I have added an array controller to the pref nib with its MOC set to files owner's MOC in IB.
The controller manages an entity not a mutable dictionary.
MOC is a synthesized property of the PrefController (the windowController mentioned above).

if (!prefPanelController) {
	prefPanelController = [[PreferencesController alloc] initWithWindowNibName:@"testPref"];
	[prefPanelController setManagedObjectContext:[self managedObjectContext]];
}
[prefPanelController showWindow:sender];

No window opens and I get a console error:  Cannot perform operation without a managed object context

Could someone give me the gentle head slap I need here?
Steve
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