gistfile1.txt

dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_HIGH, 0ul), ^{
            // Do a taks in the background
            NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
            [[storage cookies] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
                [storage deleteCookie:obj];
                if(stop) {
                    NSArray *cookies = [NSKeyedUnarchiver unarchiveObjectWithData:[[self.array objectAtIndex:indexPath.row] objectAtIndex:1]];  
                    [cookies enumerateObjectsUsingBlock:^(id obj2, NSUInteger idx, BOOL *stop2) {
                        [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:obj2]; 
                        if(stop2) {
                            dispatch_async(dispatch_get_main_queue(), ^{
                               
                                [[NSNotificationCenter defaultCenter] postNotificationName:@"getFolders" object:nil];
                                [[NSUserDefaults standardUserDefaults] setValue:[[self.array objectAtIndex:indexPath.row] objectAtIndex:0] forKey:@"currentUser"];
                                [[NSUserDefaults standardUserDefaults] synchronize];
                                 [SVProgressHUD dismissWithSuccess:@"Switched!"];
                                [self closeView];
                            });
                            
                        }
                    }];
                }
            }];
            // Hide the HUD in the main tread 

        });