UIPageViewController 显示黑屏
UIPageViewController showing black screen
我的 UIPageViewController 在 运行 时显示为黑屏。
它是应用委托中设置的根视图控制器:
window = UIWindow()
let mainPageViewController = MainPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
window?.rootViewController = mainPageViewController
这是我的 MainPageViewController 代码:
class MainPageViewController: UIPageViewController, UIPageViewControllerDataSource
{
override func viewDidLoad()
{
super.viewDidLoad()
dataSource = self
let profileController = ProfileController()
let viewControllers = [profileController]
self.setViewControllers(viewControllers, direction: .forward, animated: true, completion: nil)
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController?
{
return nil
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController?
{
return nil
}
}
我试图设置为初始页面的 profilecontroller 是一个普通的 UIViewController。
我已经尝试了很多东西,但它总是只显示黑屏。知道我做错了什么吗?
我不确定你的问题是什么,如果你的问题是 you don't know why your screen is black?
,我认为你应该在 appDelegate 中设置:
window.backgroundColor = .white
并将此发送给您的控制器:
self.view.backgroundColor = .white
试试这个:-
self.window = UIWindow(frame: UIScreen.main.bounds)
let mainPageViewController = MainPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
window?.rootViewController = mainPageViewController
self.window?.makeKeyAndVisible()
您的 PageViewController 非常好。但是,您设置 rootViewController 的过程遗漏了以下内容:
window = UIWindow()
let mainPageViewController = MainPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
window?.rootViewController = mainPageViewController
// This line will make it visible
window?.makeKeyAndVisible()
我的 UIPageViewController 在 运行 时显示为黑屏。
它是应用委托中设置的根视图控制器:
window = UIWindow()
let mainPageViewController = MainPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
window?.rootViewController = mainPageViewController
这是我的 MainPageViewController 代码:
class MainPageViewController: UIPageViewController, UIPageViewControllerDataSource
{
override func viewDidLoad()
{
super.viewDidLoad()
dataSource = self
let profileController = ProfileController()
let viewControllers = [profileController]
self.setViewControllers(viewControllers, direction: .forward, animated: true, completion: nil)
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController?
{
return nil
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController?
{
return nil
}
}
我试图设置为初始页面的 profilecontroller 是一个普通的 UIViewController。
我已经尝试了很多东西,但它总是只显示黑屏。知道我做错了什么吗?
我不确定你的问题是什么,如果你的问题是 you don't know why your screen is black?
,我认为你应该在 appDelegate 中设置:
window.backgroundColor = .white
并将此发送给您的控制器:
self.view.backgroundColor = .white
试试这个:-
self.window = UIWindow(frame: UIScreen.main.bounds)
let mainPageViewController = MainPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
window?.rootViewController = mainPageViewController
self.window?.makeKeyAndVisible()
您的 PageViewController 非常好。但是,您设置 rootViewController 的过程遗漏了以下内容:
window = UIWindow()
let mainPageViewController = MainPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
window?.rootViewController = mainPageViewController
// This line will make it visible
window?.makeKeyAndVisible()