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

问题描述

我必须实现UIPageViewController作为UIViewController的子视图. UIPageViewController内部有一些逻辑和其他ViewController.我的问题是如何在下面连接这两段代码.

I have to implement a UIPageViewController as a subview to my UIViewController. The UIPageViewController has some logic and other ViewControllers inside. My question is how to connect these two pieces of code below.

这是我的主要UIViewController代码:

So this is my main UIViewController code:

class MyMainViewController: UIViewController {

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

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

and my UIPageViewController code, which implements an endless loop between ViewControllers that he contains (I copied the whole code, probably it wasn't necessary ):

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
    }

}

推荐答案

在布置MyMainViewController和TutorialPageViewController的情节提要中，您需要将容器视图添加到MyMainViewController，然后使用Embed搜索以嵌入TutorialPageViewController.

In the storyboard where you layout MyMainViewController and TutorialPageViewController, you will need to add a container view to MyMainViewController and then use an Embed segue to embed TutorialPageViewController.

当显示MyMainViewController时，它现在还将自动插入您的教程视图.

When MyMainViewController is shown, it will now automatically insert your tutorial view as well.

这篇关于在Swift中将UIPageViewController的逻辑实现为UIViewController的子视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！