Enforce collectionView to have only 2 rows

Question

I have to make one collection view so that irrespective of iphone size we have just 2 images in each row and also we need border between each row and column as shown in the

Answer 1

Implement the following functions from collectionView's protocol:

// cell size

func collectionView(collectionView: UICollectionView,
        layout collectionViewLayout: UICollectionViewLayout,
        sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
    return CGSize(width: view.frame.size.width/2, height: view.frame.size.width/2)
}

...where view is your controller's (super) view

// inter-spacing

func collectionView(collectionView: UICollectionView,
        layout collectionViewLayout: UICollectionViewLayout,
        minimumInteritemSpacingForSectionAtIndex section: Int) -> CGFloat {
    return 2.0
}

func collectionView(collectionView: UICollectionView, layout
        collectionViewLayout: UICollectionViewLayout,
        minimumLineSpacingForSectionAtIndex section: Int) -> CGFloat {
    return 2.0
}