GCD FAIL

How not to do GCD

- (void)loadA
{
    
}
- (void)loadA
{
    [[self aDataSource] loadAWithOnLoad:^(NSArray *newObjects) {
        NSLog(@"WAIT 1");
    } onError:^(NSError *error) {
        UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Error" message:[error localizedDescription] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
    }];   
}

- (void)loadB...loadC....

- (void)reload 
{
    
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_group_t group = dispatch_group_create();
    dispatch_group_async(group, queue, ^{
        [self loadA];
    });
    dispatch_group_async(group, queue, ^{
        [self loadB];
    });
    dispatch_group_async(group, queue, ^{
        [self loadC];
    });
    dispatch_group_notify(group, queue, ^{
        NSLog(@"WAIT FINAL");
    });
    dispatch_release(group);
    
}