Question

I use the following code to delete the coredata DB contents… I get the notification properly..But it seems the data are not deleted… I can’t figure it out…

NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
       NSEntityDescription *entity = [NSEntityDescription entityForName:entityDescription inManagedObjectContext:self.managedObjectContext];
       [fetchRequest setEntity:entity];
       NSError *errors;
       NSArray *items = [self.managedObjectContext executeFetchRequest:fetchRequest error:&errors];
       NSLog(@"FinalArray:%@",[finalArray objectAtIndex:currentImageIndex]);
       NSManagedObject *managedObject=[finalArray objectAtIndex:currentImageIndex];
       NSLog(@"NSManagedObject:%@",managedObject);
       for (int i=0;i<[items count];i++)
       {
           if ([managedObject isEqual:[items objectAtIndex:i]])
           {
               [self.managedObjectContext deleteObject:managedObject];
               NSLog(@"gone");
           }
       }
       NSNotificationCenter *nc=[NSNotificationCenter defaultCenter];
       [nc addObserver:self selector:@selector(deleteCheck:) name:NSManagedObjectContextObjectsDidChangeNotification object:self.managedObjectContext];
       NSLog(@"dffsdf%@",[errors description]);
       if (self.managedObjectContext==nil)
       {
           NSLog(@"deleted");
       }

Notification Func call

  - (void)deleteCheck:(NSNotification *)notification 
{
    NSLog(@"CoreData got Deleted");
    NSDictionary *userInfoDictionary = [notification userInfo];
    NSSet *deletedObjects = [userInfoDictionary objectForKey:NSDeletedObjectsKey];
    NSLog(@"DeletedObjects%@",deletedObjects);
}

Since NSManagedObjectContextObjectsDidChangeNotification notification called for each time when I tap the delete button… But no effects in DB… Suggestions Please

Answer 1

You need to save at the end.

NSError *error = nil;
[self.managedObjectContext save:&error];