ios - 具有不同 ViewController 的 UIPageViewController

Question

我想使用带有拖曳按钮(下一个和上一个)的 UIPageViewController 来显示 7 个具有不同内容的 View Controller ，这是仅实现 UIPageViewController 后的我的 Storyboard。

我的问题是如何将这些 View Controller 放入 UIPageViewController 中？

Answer 1

用 Swift 回答:

在 UIPageVC 实例的 viewDidLoad 中调用 setViewControllers 方法来定义您的第一个 VC、方向等:

override func viewDidLoad() {
    super.viewDidLoad()
    dataSource = self
    let vc = storyboard!.instantiateViewController(withIdentifier: "whatever storyboard id your first VC is")
    setViewControllers([vc],
                       direction: .forward,
                       animated: false,
                       completion: nil)
}

使用 UIPageViewControllerDataSource 协议(protocol)方法来定义当前 viewController 之前和之后的页面以及 View Controller 计数和索引。

func pageViewController(_ pageViewController: UIPageViewController,
                        viewControllerBefore viewController: UIViewController) -> UIViewController?
{
    // Return some VC based on what the current viewController param is.
}

func pageViewController(_ pageViewController: UIPageViewController,
                        viewControllerAfter viewController: UIViewController) -> UIViewController?
{
   // Return some VC based on what the current viewController param is.
}

func presentationCount(for pageViewController: UIPageViewController) -> Int {
    return 7
}

func presentationIndex(for pageViewController: UIPageViewController) -> Int {
    return viewControllers!.index(of: viewControllers!.first!)!
}