[self.collectionView performBatchUpdates:^{

            // Update the datasource
            [self updateTasks];

            // Insert the new item into the collection
            [self.collectionView insertItemsAtIndexPaths:@[[NSIndexPath indexPathForItem:[self.tasks indexOfObject:task] inSection:0]]];

        } completion:^(BOOL finished) {

            // reload data and scroll
            [self.collectionView reloadData];
            [self.collectionView scrollToItemAtIndexPath:@[[NSIndexPath indexPathForItem:[self.tasks indexOfObject:task] inSection:0] atScrollPosition:UICollectionViewScrollPositionTop animated:YES];

        }];