NSManagedObjects that I own being released by main.m?

Question

First, in my root view controllers viewDidLoad, I initialize an NSDictionary with arrays of NSManagedObjects, like so:

- (void)viewDidLoad {
    [super viewD         


        

Answer 1

Rerun your program with the environment variableNSZombieEnabled set to YES. That will tell you when you're double releasing the object, and what object it is. Alternatively, you can debug this in Instruments using the Zombies tool.

Answer 2

self.tips hasn't been released; the Tip returned by [self.tips objectForKey:categoryNameString] has. It's returning a fault, not an object. Core Data will automatically fault objects when necessary.

Try putting this in when defining your NSFetchRequest:

[fetchRequest setReturnsObjectsAsFaults:NO];

This is what is going on: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreData/Articles/cdFaultingUniquing.html, if you want to learn more about it.