问如何使集合视图水平滚动，在两个方向上都有无限大的滚动，同时也可以在iOS well中

EN

let itemcount = array?.count ?? 0
func scrollViewDidScroll(_ scrollView: UIScrollView) {
                if scrollView == DemoCollectionView {
                    let offSet = scrollView.contentOffset.x
                    let width = scrollView.frame.width
                    let horizontalCenter = width / 2
                    let currentPage = Int(offSet + horizontalCenter) / Int(width)
                    if currentPage >= itemCount / 2 {
                        itemCount += array?.count ?? 0
                        DemoCollectionView.reloadData()
                    }
                }
            }