Missing Core Data Notifications
cocoa-touch, core-data, iphone
Solution
Switch your `@"NSManagedObjectContextWillSaveNotification"` to `NSManagedObjectContextWillSaveNotification`. Those are constants. The events are most likely being posted but you are not listening for the right name.
Problem
I'm trying a multithreaded Core Data implementation on iPhone SDK 3.1.3. I have two different NSManagedObjectContext objects for each thread and I am registering for the change notifications on one thread like below: ``` - (void)setup { DLog(@"Registering for NSManagedObjectContext notifications"); NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; [nc addObserver:self selector:@selector(test:) name:@"NSManagedObjectContextWillSaveNotification" object:nil]; [nc addObserver:self selector:@selector(test:) name:@"NSManagedObjectContextDidSaveNotification" object:nil]; [nc addObserver:self selector:@selector(test:) name:@"NSManagedObjectContextObjectsDidChangeNotification" object:nil]; } - (void)test:(NSNotification *)notif { DLog(@"Test callback"); } ``` In my other thread I am saving the second context like so: ``` NSError *error = nil; [managedObjectContext save:&error]; if (error) { ALog(@"Error occured while trying to save a NewsStory object"); } else { DLog(@"Saving context"); } ``` The notification callback method never gets executed though, which makes me believe these notifications are never posted? My log shows the following: ``` Registering for NSManagedObjectContext notifications Saving context ... Saving context ```