BannerView-4.swift

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
        let currentPage:Int = Int(scrollView.contentOffset.x / scrollView.frame.size.width)
        if currentPage == 0 {
            self.scrollView.contentOffset = CGPoint(x: scrollView.frame.size.width * CGFloat(numberOfItems), y: scrollView.contentOffset.y)
        }
        else if currentPage == numberOfItems {
            self.scrollView.contentOffset = CGPoint(x: 0, y: scrollView.contentOffset.y)
        }
  }