uicollectionview select an item immediately after reloaddata?

Question

After calling -[UICollectionView reloadData] it takes some time for cells to be displayed, so selecting an item immediately after calling reloadData do

Answer 1

The Swift way:

let selected = collectionView.indexPathsForSelectedItems()
collectionView.performBatchUpdates({ [weak self] in
    self?.collectionView.reloadSections(NSIndexSet(index: 0))
    }) { completed -> Void in
        selected?.forEach { [weak self] indexPath in
            self?.collectionView.selectItemAtIndexPath(indexPath, animated: false, scrollPosition: [])
        }
}