PageViewController 显示黑屏

Posted 2023-03-13

【中文标题】PageViewController 显示黑屏

【英文标题】：PageViewController showing a black screen

【发布时间】：2017-03-13 12:56:59

【问题描述】：

在故事板中我有一个UIPageViewController，这是我的代码

class ReservedTimesViewController: UIPageViewController 

    override func viewDidLoad() 
        super.viewDidLoad()
    

    override func didReceiveMemoryWarning() 
        super.didReceiveMemoryWarning()
    


extension ReservedTimesViewController: UIPageViewControllerDataSource 
    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? 
        let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ReservedTimesTableViewController")
        print(controller)
   return controller
    

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? 
        let controller = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ReservedTimesTableViewController")
        print(controller)
        return controller
    

这是我在故事板中的ReservedTimesTableViewController

但我遇到了黑屏。为什么它不能正常工作？

【问题讨论】：

检查是否为页面控制器设置了委托和数据源

你为什么用UITableViewController作为UIPageViewController

【参考方案1】：

在加载控制器时，您必须使用此代码设置初始页面

override func viewDidLoad() 
    super.viewDidLoad()
    dataSource = self;
    self.setViewControllers([getViewControllerAtIndex(index: 0)] as [UIViewController], direction: UIPageViewControllerNavigationDirection.forward, animated: false, completion: nil)


func getViewControllerAtIndex(index: Int) -> ReservedTimesTableViewController

    // Create a new view controller and pass suitable data.
    let reservedTimesTableViewController = self.storyboard?.instantiateViewController(withIdentifier: "ReservedTimesTableViewController") as! ReservedTimesTableViewController
    return reservedTimesTableViewController

当您尝试滚动页面后，数据源方法将完成它们的工作。