Question

我有一个PageViewController，它有两个UIViewControllers，它们的设置如下：

ViewController.swift

override func viewDidLoad() {
    super.viewDidLoad()

    self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("PageViewController") as! UIPageViewController
    self.pageViewController.dataSource = self
    self.pageViewController.delegate = self

    let startingViewController = self.viewControllerAtIndex(self.index)
    let viewControllers: NSArray = [startingViewController]
    self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: false, completion: nil)

    self.pageViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height-10)
    self.addChildViewController(self.pageViewController)
    self.view.addSubview(self.pageViewController.view)
    self.pageViewController.didMoveToParentViewController(self)

}

在其中一个子视图控制器中，我有一个按钮，它应该转换到PageViewController中的特定索引：

    @IBAction func createClick(sender: UIButton, forEvent event: UIEvent) {

    let pageViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("PageViewController") as! UIPageViewController

    let secondViewController = self.storyboard?.instantiateViewControllerWithIdentifier("NextViewController") as! UIViewController
    let viewControllers: NSArray = [secondViewController]
    pageViewController.self.setViewControllers(viewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)

}

没有错误，但页面没有转换。我认为代表团存在问题，但我不确定如何修复它。

Answer 1

问题是您实际上并未在应用实际使用的viewControllers上设置UIPageViewController属性 - 您正在从故事板中实例化一个全新的UIPageViewController与屏幕上出现的任何控制器无关。

一种解决方案是在每个子视图控制器中创建对UIPageViewController的引用，如下所示：

weak var pageViewController: UIPageViewController?

在dataSource中，当您实施＆＃34;＆＃34;之后＆＃34;之前＆＃34;方法，即：pageViewController:viewControllerBeforeViewController:和pageViewController:viewControllerAfterViewController:您需要创建新的子视图控制器，然后将pageViewController属性设置为对＆＃34; parent＆＃34;的引用。 UIPageViewController。

然后，当您调用@IBAction方法时，可以像pageViewController一样调用let secondViewController = self.storyboard?.instantiateViewControllerWithIdentifier("NextViewController") as! UIViewController let viewControllers: NSArray = [secondViewController] pageViewController?.setViewControllers(viewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)上的方法：

\n

这样的事情应该有用。

UIPageViewController从子控件UIViewController转换

1 个答案: