带有页面控件图标的容器视图中的UIPageViewContoller

Question

我正在编写一个包含三个视图的Swift应用程序。我通过在容器中放置一个UIPageViewController并在您从另一个Stack Overflow文章UIPageViewController and storyboard进行滑动时使用该开关来实现此目的。我还希望在底部有点表示您所在的页面。但是，我正在使用的UIPageControl只能放在带容器的视图控制器上，而当前页面的代码位于页面控制器的代码中。这是我的代码：

class ContainerView : UIViewController {
    @IBOutlet var myPageController: UIPageControl!
}

class MyPageViewController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {

    var pages = [UIViewController]()

    override func viewDidLoad() {
        super.viewDidLoad()

        self.delegate = self
        self.dataSource = self

        let page1: UIViewController! = storyboard?.instantiateViewController(withIdentifier: "Page1ID")
        let page2: UIViewController! = storyboard?.instantiateViewController(withIdentifier: "Page2ID")
        let page3: UIViewController! = storyboard?.instantiateViewController(withIdentifier: "Page3ID")
        pages.append(page1)
        pages.append(page2)
        pages.append(page3)
        setViewControllers([page1], direction: UIPageViewControllerNavigationDirection.forward, animated: false, completion: nil)
    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
        let currentIndex = pages.index(of: viewController)!
        if (currentIndex == 0) {
            return pages[currentIndex]
        }
        let previousIndex = abs((currentIndex - 1) % pages.count)
        //myPageControl.currentPage = previousIndex
        return pages[previousIndex]
    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
        let currentIndex = pages.index(of: viewController)!
        if (currentIndex == 2) {
            return pages[currentIndex]
        }
        let nextIndex = abs((currentIndex + 1) % pages.count)
        //myPageControl.currentPage = nextIndex
        return pages[nextIndex]
    }

    func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
        return pages.count
    }

    func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
        return 0
    }

}

如何从容器中的子节点（MyPageViewController）访问父视图控制器（ContainerView）？我是Swift / Objective-C的新手，但已经用其他语言编程（C ++，Python）。如果您需要故事板，请询问。