Change UICollectionViewCell size on different device orientations

Question

I am using an UICollectionView with UICollectionViewFlowLayout.

I set the size of each cell through the

collectionView:lay         


        

Answer 1

There's a simple way to set collection view cell size:

UICollectionViewFlowLayout *layout = (id) self.collectionView.collectionViewLayout;
layout.itemSize = CGSizeMake(cellSize, cellSize);

Not sure if it's animatable though.