UICollectionView Set number of columns

Question

I just started learning about UICollectionViews. I\'m wondering if anyone knows how to specify the number of columns in a collectionview. The default is set to 3 (iPhone/por

Answer 1

Here is the working code for Swift 3, to have a two-columns layout :

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

    let nbCol = 2

    let flowLayout = collectionViewLayout as! UICollectionViewFlowLayout
    let totalSpace = flowLayout.sectionInset.left
        + flowLayout.sectionInset.right
        + (flowLayout.minimumInteritemSpacing * CGFloat(nbCol - 1))
    let size = Int((collectionView.bounds.width - totalSpace) / CGFloat(nbCol))
    return CGSize(width: size, height: size)
}

Feel free to change "nbCol" to your desired number of columns.