It has been a while since I’ve tackled CoreData and macOS, back in the days of xib and nibs. With a xib, there’s the “File’s Owner” that can give you access to your document and the managedObjectContext. Easy.
With NSPersistentDocument and my storyboard, I’m having a bit of a chicken and egg problem. In my Document class, subclassed from NSPersistentDocument, I have the following:
override func makeWindowControllers() {
// Returns the Storyboard that contains your Document window.
let storyboard = NSStoryboard(name: "Main", bundle: nil)
let windowController = storyboard.instantiateControllerWithIdentifier("Document Window Controller") as! NSWindowController // <- when I need the moc
self.addWindowController(windowController)
windowController.contentViewController!.representedObject = self // <- when I set the representedObject
}
This seems to be what many folks, including Apple, are suggesting.
My problem is this: In the MainViewController, I want to have an Object Controller and it needs to be bound to the managedObjectContext but when it needs to have the managedObjectContext, I haven’t yet set the representedObject to self. So an exception is thrown. Setting the representedObject at the end of the makeWindowControllers method is too late but I don’t see anyway to get it in earlier.