Changes saved from one NSManagedObjectContext doesn't reflect on main NSManagedObjectContext

Question

I have a main NSManagedObjectContext that\'s created in the appDelegate.

Now, I\'m using another NSManagedObjectContext for editin

Answer 1

If you haven't already done so, I suggest reading the Apple documentation on Core Data : Change Management.

You need to notify the first context of the changes that were saved through the second context. When saving a context, it posts a NSManagedObjectContextDidSaveNotification. Register for that notification. In the handler method, merge into the first context the changes saved through the second context. For example:

// second managed object context save

// register for the notification
[[NSNotificationCenter defaultCenter] 
    addObserver:self 
       selector:@selector(handleDidSaveNotification:)
           name:NSManagedObjectContextDidSaveNotification 
         object:secondManagedObjectContext];

// rest of the code ommitted for clarity
if (![secondManagedObjectContext save:&error]) {
    // ...
}

// unregister from notification
[[NSNotificationCenter defaultCenter] 
    removeObserver:self 
              name:NSManagedObjectContextDidSaveNotification 
            object:secondManagedObjectContext];

Notification handler:

- (void)handleDidSaveNotification:(NSNotification *)note {
    [firstManagedObjectContext mergeChangesFromContextDidSaveNotification:note];
}