UIPageControl 显示当前页面

Question

我做了一个PageViewController在不同视图控制器之间切换的方法，我想显示我们看到的页面。我添加了一个pageControl，并给出了以下代码。

pageControl.currentPageIndicatorTintColor = UIColor.blueColor()
pageControl.pageIndicatorTintColor = UIColor.lightGrayColor()
pageControl.numberOfPages = pages.count

完整代码：

import UIKit

class ViewControllerSportinfrastructuur: UIViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {

@IBOutlet weak var pageControl: UIPageControl!

var pageViewController: UIPageViewController!
let pages = ["PageOneViewController", "PageTwoViewController"]

//MARK: - page view controller data source
func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {

    if let index = pages.indexOf(viewController.restorationIdentifier!) {
        if index > 0 {
            return viewControllerAtIndex(index - 1)
        }
    }

    return nil
}

func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {

    if let index = pages.indexOf(viewController.restorationIdentifier!) {
        if index < pages.count - 1 {
            return viewControllerAtIndex(index + 1)
        }
    }
    return nil
}

func viewControllerAtIndex(index: Int) -> UIViewController? {
    let vc = storyboard?.instantiateViewControllerWithIdentifier(pages[index])
    return vc
}

override func viewDidLoad() {
    super.viewDidLoad()

    if let vc = storyboard?.instantiateViewControllerWithIdentifier("MyPageViewController") {
        self.addChildViewController(vc)
        self.view.addSubview(vc.view)

        pageViewController = vc as! UIPageViewController
        pageViewController.dataSource = self
        pageViewController.delegate = self
        pageViewController.setViewControllers([viewControllerAtIndex(0)!], direction: .Forward, animated: true, completion: nil)
        pageViewController.didMoveToParentViewController(self)

        pageControl.currentPageIndicatorTintColor = UIColor.blueColor()
        pageControl.pageIndicatorTintColor = UIColor.lightGrayColor()
        pageControl.numberOfPages = pages.count
    }
}

有谁知道我应该使用什么代码来设置当前页面？提前致谢！

Answer 1

编辑：已经找到答案了！

我添加pageControl.currentPage = index了以下功能：

func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {

    if let index = pages.indexOf(viewController.restorationIdentifier!) {
        pageControl.currentPage = index
        if index > 0 {
            return viewControllerAtIndex(index - 1)
        }
    }

    return nil
}

并对 func 做了同样的事情viewControllerAfterViewController！