Question

我目前在删除背景（屏幕底部的栏）方面存在问题，就像他们在post

中完全出现的问题一样

但是，发布的解决方案都在Objective-c中。我试图把它翻译成Swift，但它没有用。

我也试图改变＆＃34; UIPageControl.appearance（）＆＃34;清洁颜色，但它仍然没有工作。

任何人都可以提供一些提示吗？

谢谢！

我的代码在这里：

import UIKit

class TutorialViewController: UIViewController, UIPageViewControllerDataSource{

var pageViewController: UIPageViewController?
let contentImages = ["Tutorial1.png", "Tutorial2.png","Tutorial3.png"]


override func viewDidLoad() {
    super.viewDidLoad()
    createPageViewController()
    setupPageControl()

    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

    //supporting functions
private func createPageViewController() {

    let pageController = self.storyboard!.instantiateViewControllerWithIdentifier("PageController") as! UIPageViewController
    pageController.dataSource = self

    if contentImages.count > 0 {
        let firstController = getItemController(0)!
        let startingViewControllers: NSArray = [firstController]
        pageController.setViewControllers(startingViewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: false, completion: nil)
    }

    pageViewController = pageController
    addChildViewController(pageViewController!)
    self.view.addSubview(pageViewController!.view)
    pageViewController!.didMoveToParentViewController(self)
}

private func setupPageControl() {
    let appearance = UIPageControl.appearance()
    appearance.pageIndicatorTintColor = UIColor.grayColor()
    appearance.currentPageIndicatorTintColor = UIColor.whiteColor()
    appearance.backgroundColor = UIColor.clearColor()
}

// MARK: - UIPageViewControllerDataSource

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

    let itemController = viewController as! PageItemViewController

    if itemController.itemIndex > 0 {
        return getItemController(itemController.itemIndex-1)
    }

    return nil
}

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

    let itemController = viewController as! PageItemViewController

    if itemController.itemIndex+1 < contentImages.count {
        return getItemController(itemController.itemIndex+1)
    }

    return nil
}

private func getItemController(itemIndex: Int) -> PageItemViewController? {

    if itemIndex < contentImages.count {
        let pageItemController = self.storyboard!.instantiateViewControllerWithIdentifier("TutorialItemController")as! PageItemViewController
        pageItemController.itemIndex = itemIndex
        pageItemController.imageName = contentImages[itemIndex]
        return pageItemController
    }

    return nil
}

// MARK: - Page Indicator

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

func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
    return 0
}

override func prefersStatusBarHidden() -> Bool {

    return true;
}

}

Answer 1

尝试删除此方法

func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
return 0
}

它很快就适合我。

Answer 2

如果您检查了您提供的示例链接，我发现您可能会在实施中帮助您一些差异

1。 //我们需要通过使框架更高（+ 37）来覆盖所有控件

[[self.pageController view] setFrame:CGRectMake(0, 0, [[self view] bounds].size.width, [[self view] bounds].size.height + 37)];

- 在PageViewController中添加额外高度，以隐藏默认页面控制器底栏

//将公共控件带到前台（由于框架较高，它们被隐藏）

2。

[self.view bringSubviewToFront:self.pcDots];

诀窍是将PageControl放在底部的前景中。把UIPageControl放在UIPageController的委托方法中设置它的值

如果您需要UIPageController的完整演示实现，可以在此处查看教程：https://spin.atomicobject.com/2015/12/23/swift-uipageviewcontroller-tutorial/

在本教程结束时，如果要在故事板中的change the position of UIPageControl in the TutorialViewController底部设置页面控件，您将获得所需的自定义UIPageController

如何在Swift的页面视图中隐藏点的背景？

2 个答案: