CODEWITHSUNDEEP
iphonecocoa-touchcore-datansfetchedresultscontroller
Luuk D. Jansen
Luuk D. Jansen

Reputation: 4508

Core Data does not seem to take updated values

I am running an update thread which updates a table using coredata. One of the records is called last-update. But when after the update is finished I retrieve the last-update value in the main thread I get an outdated value.

I do: 

[NSFetchedResultsController deleteCacheWithName:nil];

before query-ing the setting again, but is there anything else I should/can do to alert the mainthread that it should check the physical table again?

Upvotes: 1

Views: 251

Answers (1)

Anomie
Anomie

Reputation: 94834

It sounds like you're not syncing the updates back into the main thread's NSManagedObjectController. Try adding a method like this:

- (void)managedContextDidSave:(NSNotification *)n {
    if ([NSThread isMainThread]) {
        NSManagedObjectContext *context = /* Get context for main thread */;
        [context mergeChangesFromContextDidSaveNotification:n];
    } else {
        [self performSelectorOnMainThread:@selector(managedContextDidSave:) withObject:n waitUntilDone:YES];
    }
}

Then hook that up to the NSManagedObjectContextDidSaveNotification:

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(managedContextDidSave:) name:NSManagedObjectContextDidSaveNotification object:nil];

Upvotes: 2

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