CollectionView horizontal scrolling example

gistfile1.txt

//
//
//Here is the programmatic setup for the CollectionView
//
//

    let collectionView: UICollectionView = {
        let layout = UICollectionViewFlowLayout()
        layout.scrollDirection = .horizontal //Change this to vertical
        layout.minimumLineSpacing = 8 //Spacing here is not necessary, but adds a better inset for horizontal scrolling. Gives you a tiny peek of the background. Probably not great for vertical
        layout.minimumInteritemSpacing = 0
        layout.sectionInset = UIEdgeInsets(top: 0, left: 4, bottom: 0, right: 4)
        let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)
        collectionView.isPagingEnabled = true
        collectionView.contentInsetAdjustmentBehavior = .never
        collectionView.showsHorizontalScrollIndicator = false //Change this to vertical
        collectionView.register(InspectionCardCollectionViewCell.self, forCellWithReuseIdentifier: InspectionCardCollectionViewCell.Constants.collectionIdentifier) //Register your own dang cell! lol
        return collectionView
    }()
    
//
//
//Create extension fo your scrollview delegate
//
//
    
    extension ViewController : UIScrollViewDelegate {

    func scrollViewDidScroll(_ scrollView: UIScrollView) { //When scrolling it sets the contentOffset to zero, so there is no offset when scrolling
        collectionView.contentOffset.y = 0 //Set the offset to X for vertical maybe
    }
}

//
//
//You may have to define a size for the view. Adding this here in the event you have trouble
//
//


extension ViewController: UICollectionViewDelegateFlowLayout { //Not sure if this is needed, I don't remember why I used it

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize{
        let size = CGSize(width: collectionView.bounds.width - 8, height: collectionView.bounds.height)
        return size
    }
}
    

This line saved my day. Thanks.

collectionView.contentInsetAdjustmentBehavior = .never