UIPageViewController delegate/datasource 方法未触发

Question

我有这样的设置：

UIWindow->UIViewController->UIPageViewController->UIViewController.

我已将 UIPageViewController 的委托和数据源设置为 UIViewController 中的 self，但是每次我尝试用数据更新 UIPageViewController 时，它只会显示一张图片。我正在将父 UIViewController 的框架从小放大到大，也许这会影响它？我在 UIWindow 以外的其他地方有几乎相同的代码，并且可以工作。 UIWindow 有什么事吗？

如有任何帮助，我们将不胜感激！

--编辑--

好的，请提供更多信息。当用户选择 table 视图单元格时，我会调用它。首先，我创建了一个新的 UIWindow，它与当前的主 UIWindow 大小相同，但位于状态栏的顶部。然后我从故事板创建一个 ExpandedViewController，将它的帧大小设置为与 UITableViewCell 相同，给它一些图像加载到 UIPageViewController，然后告诉它重新加载它的数据。我还调整了 UIPageViewController 的视图控制器内的 UIImageView 的中心，稍后我可以对其进行动画处理，但这无关紧要。然后我将 ExpandedViewController 的视图添加到 UIWindow。这是代码：

    let cell = tableView.dequeueReusableCellWithIdentifier("aCell", forIndexPath: indexPath) as! ContentTableCell

    var cellRect = tableView.rectForRowAtIndexPath(indexPath)
    var convertedFrame = tableView.convertRect(cellRect, toView: UIApplication.sharedApplication().keyWindow!)

    newWindow = UIWindow(frame: self.view.window!.bounds)
    newWindow.hidden = false
    newWindow.windowLevel = (UIWindowLevelStatusBar + 1)

    var expandedViewController = self.storyboard!.instantiateViewControllerWithIdentifier("ExpandedViewController")! as! ExpandedViewController
    expandedViewController.view.frame = convertedFrame
    expandedViewController.pageImages = imagesForTableView
    expandedViewController.reloadData(indexPath.row)

    var expandedContentViewController = (expandedViewController.pageViewController.viewControllers.last! as! ExpandedContentViewController)

    expandedContentViewController.imageView.frame = self.view.frame
    expandedContentViewController.imageView.center = CGPointMake(cellRect.width/2, cellRect.height/2 + 5)

    newWindow.backgroundColor = UIColor(red: 30/255, green: 1/255, blue: 42/255, alpha: 1)
    newWindow.addSubview(expandedViewController.view)
    newWindow.makeKeyAndVisible()

ExpandedViewController 的 ViewDidLoad() 方法中有这段代码：

    self.view.clipsToBounds = true

    pageImages = []

    // Initialise the Page View Controller from storyboard. Set ourselves as delegate and datasource to it.
    pageViewController = storyboard!.instantiateViewControllerWithIdentifier("ExpandedPageViewController")! as! UIPageViewController
    pageViewController.dataSource = self
    pageViewController.delegate = self

    // Get the View Controller for the first page of the Page View Controller and store in an array
    if let startingViewController: ExpandedContentViewController = viewControllerAtIndex(0) {
        let viewControllers: NSArray = [startingViewController]
        // Set the first page of the Page View Controller
        pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: false, completion: nil)
    }

    // Make sure the Page View Controller takes up full area of screen
    pageViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)

    // Add the Page View Controller to current view
    self.addChildViewController(pageViewController)
    self.view.addSubview(pageViewController.view)
    self.pageViewController.didMoveToParentViewController(self)

Answer 1

我通过替换

解决了它

newWindow.addSubview(expandedViewController.view)

和

newWindow.rootViewController = expandedViewController

事实证明 .rootViewController 是向 UIWindow

添加视图的推荐方式

UIPageViewController delegate/datasource 方法未触发

UIPageViewController delegate/datasource methods not firing

ios

objective-c

swift

uipageviewcontroller