Aligning collection view cells to fit exactly 3 per row

Question

I am trying to make a collection view of images, so that there are 3 per row, with no spacing in between.

My collection view data sources are:

func n         


        

Answer 1

you can use this

This code is somehow written that you can change section inset or minimumInteritemSpacing and this calculate and resize with this parameters

you can use this code or download project from Github

 func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {


        let flowLayout = collectionViewLayout as! UICollectionViewFlowLayout

        let numberofItem: CGFloat = 3

        let collectionViewWidth = self.collectionView.bounds.width

        let extraSpace = (numberofItem - 1) * flowLayout.minimumInteritemSpacing

        let inset = flowLayout.sectionInset.right + flowLayout.sectionInset.left

        let width = Int((collectionViewWidth - extraSpace - inset) / numberofItem)

        print(width)

        return CGSize(width: width, height: width)
    }