import PageViewController

private let pageViewController = PageViewController([])

private func setupPageViewController() {
    self.pageViewController.pageDelegate = self
    let vcList: [UIViewController] = [ /** Set your UIViewControllers */ ]
    self.pageViewController.setup(vcList)
    self.addChild(self.pageViewController)
    self.view.addSubview(self.pageViewController.view)
    self.pageViewController.view.frame = self.view.bounds
    self.pageViewController.didMove(toParent: self)
}

extension ViewController: PageViewControllerDelegate {
    func pageViewController(_ vc: PageViewController, didChangePage page: Int) {
	// Here you can create a process after changing the page.
    }
}