UICollectionView spacing margins

Question

I have a UICollectionView which shows photos. I have created the collectionview using UICollectionViewFlowLayout. It works good but I would like to

Answer 1

In Objective-C

CGFloat spacing = 5;
UICollectionViewFlowLayout *flow = (UICollectionViewFlowLayout*)_habbitCollectionV.collectionViewLayout;
flow.sectionInset = UIEdgeInsetsMake(0, spacing, 0, spacing);
CGFloat itemsPerRow = 2;
CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat oneMore = itemsPerRow + 1;
CGFloat width = screenRect.size.width - spacing * oneMore;
CGFloat height = width / itemsPerRow;

flow.itemSize = CGSizeMake(floor(height), height);
flow.minimumInteritemSpacing = spacing;
flow.minimumLineSpacing = spacing;

All you have to do is change the itemsPerRow value and it will update the number of items per row accordingly. Furthermore, you can change the spacing value if you want more or less general spacing.