UICollectionView responding to device rotation with animation
When device rotating, UICollectionView needs to recalculate the insets of cells for new bounds in most case. [UICollectionView reloadData] is the simplest way to do it, »
When device rotating, UICollectionView needs to recalculate the insets of cells for new bounds in most case. [UICollectionView reloadData] is the simplest way to do it, »