在 Swift 中将 UIPageViewController 的逻辑实现为 UIViewController 的子视图

Question

我必须将 UIPageViewController 实现为我的 UIViewController 的子视图。 UIPageViewController 内部有一些逻辑和其他 ViewController。我的问题是如何连接下面这两段代码。

所以这是我的主要 UIViewController 代码：

class MyMainViewController: UIViewController {

    override func viewDidLoad() {
       super.viewDidLoad()
    }
    override func didReceiveMemoryWarning() {
       super.didReceiveMemoryWarning()
    }   
}

和我的 UIPageViewController 代码，它在他包含的 ViewController 之间实现了无限循环（我复制了整个代码，可能没有必要）：

class TutorialPageViewController: UIPageViewController {

    private(set) lazy var orderedViewControllers: [UIViewController] = {
        return [self.newColoredViewController("Green"),
                self.newColoredViewController("Red"),
                self.newColoredViewController("Blue")]
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        dataSource = self

        if let firstViewController = orderedViewControllers.first {
            setViewControllers([firstViewController],
                direction: .Forward,
                animated: true,
                completion: nil)
        }
    }

    private func newColoredViewController(color: String) -> UIViewController {
        return UIStoryboard(name: "Main", bundle: nil) .
        instantiateViewControllerWithIdentifier("\(color)ViewController")
    }

}

extension TutorialPageViewController: UIPageViewControllerDataSource {

    func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
        guard let viewControllerIndex = orderedViewControllers.indexOf(viewController) else {
            return nil
        }

        let previousIndex = viewControllerIndex - 1
        guard previousIndex >= 0 else {
            return orderedViewControllers.last
        }
        guard orderedViewControllers.count > previousIndex else {
            return nil
        }
        return orderedViewControllers[previousIndex]
    }

    func pageViewController(pageViewController: UIPageViewController,
    viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {

        guard let viewControllerIndex = orderedViewControllers.indexOf(viewController) else {
            return nil
        }

        let nextIndex = viewControllerIndex + 1
        let orderedViewControllersCount = orderedViewControllers.count

        guard orderedViewControllersCount != nextIndex else {
            return orderedViewControllers.first
        }

        guard orderedViewControllersCount > nextIndex else {
            return nil
        }

        return orderedViewControllers[nextIndex]
    }

    func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
        return orderedViewControllers.count
    }

    func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
        guard let firstViewController = viewControllers?.first,
        firstViewControllerIndex = orderedViewControllers.indexOf(firstViewController) else {
            return 0
        }

        return firstViewControllerIndex
    }

}

Answer 1

在布局 MyMainViewController 和 TutorialPageViewController 的情节提要中，您需要向 MyMainViewController 添加容器视图，然后使用 Embed segue 嵌入 TutorialPageViewController。

当显示 MyMainViewController 时，它现在也会自动插入您的教程视图。

在 Swift 中将 UIPageViewController 的逻辑实现为 UIViewController 的子视图

Implementing UIPageViewController's logic as a subview to a UIViewController in Swift

ios

swift

uiviewcontroller

uipageviewcontroller

subview