禁用 UIPageViewController 弹跳 - Swift [英] Disable UIPageViewController bouncing - Swift

问题描述

我一直在制作一个在 UIViewControllers 之间滚动的示例应用程序，但重点是我想在滚动结束时以及返回第一个 UIViewController<时禁用弹跳效果/代码>.

I've been making a sample app with scrolling between UIViewControllers but the point is i want to disable the bouncing effect at the end of scrolling and when going back to the first UIViewController.

这是我的代码:

class PageViewController: UIPageViewController,UIPageViewControllerDataSource, UIPageViewControllerDelegate{

    var index = 0
    var identifiers: NSArray = ["FirstNavigationController", "SecondNavigationController"]
    override func viewDidLoad() {

        self.dataSource = self
        self.delegate = self

        let startingViewController = self.viewControllerAtIndex(self.index)

        let viewControllers: NSArray = [startingViewController]
        self.setViewControllers(viewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: false, completion: nil)
    }

    func viewControllerAtIndex(index: Int) -> UINavigationController! {

        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
        //first view controller = firstViewControllers navigation controller
        if index == 0 {

            return storyBoard.instantiateViewControllerWithIdentifier("FirstNavigationController") as! UINavigationController

        }

        //second view controller = secondViewController's navigation controller
        if index == 1 {

            return storyBoard.instantiateViewControllerWithIdentifier("SecondNavigationController") as! UINavigationController
        }

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

        let identifier = viewController.restorationIdentifier
        let index = self.identifiers.indexOfObject(identifier!)

        //if the index is the end of the array, return nil since we dont want a view controller after the last one
        if index == identifiers.count - 1 {

            return nil
        }

        //increment the index to get the viewController after the current index
        self.index = self.index + 1
        return self.viewControllerAtIndex(self.index)

    }

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

        let identifier = viewController.restorationIdentifier
        let index = self.identifiers.indexOfObject(identifier!)

        //if the index is 0, return nil since we dont want a view controller before the first one
        if index == 0 {

            return nil
        }

        //decrement the index to get the viewController before the current one
        self.index = self.index - 1
        return self.viewControllerAtIndex(self.index)

    }

}

看看这里:

推荐答案

不知道你能不能.UIPageController 不是很可定制.

I don't know if you can. UIPageController is not very customizable.

就个人而言，当我想在 UIViewController 之间滚动时，我更喜欢使用一个简单的 UIViewController，它是一个容器，里面有一个 UIScrollView.然后我以编程方式在 UIScrollView 的 contentSize 中添加所有控制器.您必须将所有控制器添加为容器的子级.

Personally, when I want to scroll between UIViewController, I prefer using a simple UIViewController, which will be a container, with an UIScrollView in it. Then I add programmatically all the controllers in the contentSize of the UIScrollView. You have to add all the controllers as child of the container.

更新 iOS 9

func setupDetailViewControllers() {
    var previousController: UIViewController?
    for controller in self.controllers {
        addChildViewController(controller)
        addControllerInContentView(controller, previousController: previousController)
        controller.didMoveToParentViewController(self)
        previousController = controller
    }
}

func addControllerInContentView(controller: UIViewController, previousController: UIViewController?) {
    contentView.addSubview(controller.view)
    controller.view.translatesAutoresizingMaskIntoConstraints = false

    // top
    controller.view.topAnchor.constraintEqualToAnchor(contentView.topAnchor).active = true

    // bottom
    controller.view.bottomAnchor.constraintEqualToAnchor(contentView.bottomAnchor).active = true

    // trailing
    trailingContentViewConstraint?.active = false
    trailingContentViewConstraint = controller.view.trailingAnchor.constraintEqualToAnchor(contentView.trailingAnchor)
    trailingContentViewConstraint?.active = true

    // leading
    let leadingAnchor = previousController?.view.trailingAnchor ?? contentView.leadingAnchor
    controller.view.leadingAnchor.constraintEqualToAnchor(leadingAnchor).active = true

    // width
    controller.view.widthAnchor.constraintEqualToAnchor(scrollView.widthAnchor).active = true
}

以前的答案

像这样:

scrollView 是一个 IBOutlet，它对 ContainerViewController 的每个边缘都有约束

scrollView is an IBOutlet with contraints to each edge of the ContainerViewController

class ContainerViewController: UIViewController {

@IBOutlet var scrollView: UIScrollView!

override func viewDidLoad() {
    super.viewDidLoad()
    scrollView.bounces = false
    scrollView.pagingEnabled = true
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}

override func viewDidLayoutSubviews() {
    initScrollView()
}

func initScrollView(){
    let viewController1 = storyboard?.instantiateViewControllerWithIdentifier("ViewController1") as! ViewController1

    viewController1.willMoveToParentViewController(self)
    viewController1.view.frame = scrollView.bounds

    let viewController2 = storyboard?.instantiateViewControllerWithIdentifier("ViewController2") as! ViewController2

    viewController2.willMoveToParentViewController(self)
    viewController2.view.frame.size = scrollView.frame.size
    viewController2.view.frame.origin = CGPoint(x: view.frame.width, y: 0)

    scrollView.contentSize = CGSize(width: 2 * scrollView.frame.width, height: scrollView.frame.height)

    scrollView.addSubview(viewController2.view)
    self.addChildViewController(viewController2)
    viewController2.didMoveToParentViewController(self)

    scrollView.addSubview(viewController1.view)
    self.addChildViewController(viewController1)
    viewController1.didMoveToParentViewController(self)
}}

这篇关于禁用 UIPageViewController 弹跳 - Swift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IT屋！