UICellView cell layout in swift

Question

I am trying to use a UICollectionView to create a grid which a user can set to be x cells by y cells (entered in text boxes), while still occupying the same width on the scr

Answer 1

Swift 4.2 version for the answer provided by @vacawama:

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return CGFloat(vertGap)
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
    return CGFloat(horizGap)
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    // Compute the dimensions of a cell for a cellsAcross x cellsDown layout.

    let dimH = (collectionView.bounds.width - (CGFloat(cellsAcross) - 1) * CGFloat(horizGap)) / CGFloat(cellsAcross)

    let dimV = (collectionView.bounds.height - (CGFloat(cellsDown) - 1) * CGFloat(vertGap)) / CGFloat(cellsDown)

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