Question

我已经多次询问与我类似的问题，但是，在我的情况下，我以非常规方法设置了export PATH="$HOME/.rbenv/bin:$PATH" eval "$(rbenv init -)"。在过去的一天半中，我试图将其他问题解决方案应用到我的程序中，我开始相信它们只能使用更传统的方法来设置UIPageViewController。在某些背景下，我有两个UIPageViewController正在UIViewControllers之间进行转换。我希望能够以编程方式从其中一个视图控制器更改UIPageViewController的页面。这是我的UIPageViewController课程：

UIPageViewController

我试图在我的VC1中使用这段代码翻转页面：

class transitionController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {

lazy var arrayVC: [UIViewController] = {
    return [
        self.VCInstance(name: "VC1"),
        self.VCInstance(name: "VC2")
    ]
}()

private func VCInstance(name: String) -> UIViewController {
    return UIStoryboard(name:  "Main", bundle: nil).instantiateViewController(withIdentifier: name)
}

override func viewDidLoad() {
    super.viewDidLoad()
    self.dataSource = self
    self.delegate = self
    if let VC1 = arrayVC.first{
        setViewControllers([VC1], direction: .forward, animated: true, completion: nil)
    }
}
public func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
    guard let viewControllerIndex = arrayVC.index(of: viewController) else{
        return nil
    }
    guard FIRAuth.auth()?.currentUser?.uid != nil else {
        return nil
    }
    let previousIndex = viewControllerIndex - 1
    guard previousIndex >= 0 else {
        return nil
    }
    guard arrayVC.count > previousIndex else{
        return nil
    }
    return arrayVC[previousIndex]
}


public func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
    guard let viewControllerIndex = arrayVC.index(of: viewController) else{
        return nil
    }
    guard FIRAuth.auth()?.currentUser?.uid != nil else {
        return nil
    }
    let nextIndex = viewControllerIndex + 1
    guard nextIndex < arrayVC.count else {
        return nil
    }
    guard arrayVC.count > nextIndex else{
        return nil
    }
    return arrayVC[nextIndex]
}
}

我认为这不起作用，因为我正在创建转换控制器的新实例（我可能是错的）。

如何使用我设置let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "VC2") transitionController().setViewControllers([vc]?, direction: .Forward, animated: true, completion: nil)的方法以编程方式从VC1或VC2类中翻转UIPageViewController的页面？

提前致谢。

以编程方式从非常规UIPageController设置中翻转UIPageController页面

0 个答案: