Ios UIScrollView分页插入下一页

如何创建包含插入下一页的页面的UIScrollView

我目前的代码如下：

class scrollViewController: UIViewController, UIScrollViewDelegate {
    @IBOutlet weak var scrollView: UIScrollView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let V1 = self.storyboard?.instantiateViewController(withIdentifier: "homeToCategory") as UIViewController!
        self.addChildViewController(V1!)
        self.scrollView.addSubview((V1?.view)!)
        V1?.didMove(toParentViewController: self)
        V1?.view.frame = scrollView.bounds

        let V2 = self.storyboard?.instantiateViewController(withIdentifier: "FeatureViewController") as UIViewController!
        self.addChildViewController(V2!)
        self.scrollView.addSubview((V2?.view)!)
        V2?.didMove(toParentViewController: self)
        V2?.view.frame = scrollView.bounds

        var V2Frame: CGRect = V2!.view.frame
        V2Frame.origin.x = self.view.frame.width
        V2?.view.frame = V2Frame

        self.scrollView.contentSize = CGSize(width:(self.view.frame.width) * 2, height: (self.view.frame.height))
        self.scrollView.contentOffset = CGPoint(x: (self.view.frame.width) * 1, y: (self.view.frame.height))
    }
}