Question

我按照教程将JSon加载到我的应用程序中，之后我使用该数据显示我通过自定义PageViewController获取的每个Item元素的Page

方便地在设置滚动水平并实现方法presentationCount(for:UIPageViewController)和PresentationIndex(for:UIPageViewController

之后，自动提供页面控件aka点不幸的是，我有两个问题。

点所在的背景是黑色。如何更改颜色？如果有一种方法可以通过Storyboard进行，但也可以通过编程方式（只要它与我的情况兼容）就可以了。
当第一次出现单页时（显示segue），黑色条从右侧滑动时出现故障，变为上半部分，背景颜色为黑色，然后全部为黑色

请注意，在我的情况下，要显示的页数是动态的。

我遵循的教程对于自定义pageviewcontroller：https://grokswift.com/pageviewcontroller/

我尝试使用自定义点（您可以在我的控制器中看到它作为注释，因为它不起作用）http://www.seemuapps.com/page-view-controller-tutorial-with-page-dots

我的控制员：

import UIKit

class TrainingPageViewController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {

//    var pageControl = UIPageControl()
      var items : [Item] = []
//    var index = 0

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
        if let currentPageViewController = viewController as? SinglePageViewController, let currentItem:Item = currentPageViewController.item {
            let currentIndex = items.index(of: currentItem)
            return viewControllerAtIndex(index: currentIndex! - 1)
        }
        return nil
    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
        if let currentPageViewController = viewController as? SinglePageViewController, let currentItem:Item = currentPageViewController.item {
            let currentIndex = items.index(of: currentItem)
            return viewControllerAtIndex(index: currentIndex! + 1)
        }
        return nil
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        self.dataSource = self

//        self.delegate = self
//        configurePageControl()

        // FETCH data
        if let house = StartViewController.house {
            self.items = house.items
            if let firstVC = self.viewControllerAtIndex(index: 0) {
                let viewControllers = [firstVC]
                self.setViewControllers(viewControllers, direction: UIPageViewControllerNavigationDirection.forward, animated: false, completion: nil)
            }
        } else {
          print("Error loading data")
        }
    }

    func viewControllerAtIndex(index: Int) -> UIViewController? {
        if (index < 0 || index > items.count - 1){
            return nil
        } else {
            let itemAtIndex = items[index] as Item
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let vc = storyboard.instantiateViewController(withIdentifier: "SinglePageViewController") as! SinglePageViewController
            vc.item = itemAtIndex
//            self.index = index
            print("showing item \(itemAtIndex.name)")
            return vc
        }
    }

    func presentationCount(for pageViewController: UIPageViewController) -> Int {
        return self.items.count 
    }

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

//    func configurePageControl() {
//        // The total number of pages that are available is based on how many available colors we have.
//        pageControl = UIPageControl(frame: CGRect(x: 0,y: UIScreen.main.bounds.maxY - 50,width: UIScreen.main.bounds.width,height: 50))
//        self.pageControl.numberOfPages = items.count
//        self.pageControl.currentPage = 0
//        self.pageControl.tintColor = UIColor.red
//        self.pageControl.pageIndicatorTintColor = UIColor.blue
//        self.pageControl.currentPageIndicatorTintColor = UIColor.red
//        self.view.addSubview(pageControl)
//    }

//    func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
//        let pageContentViewController = pageViewController.viewControllers![0]
//        self.pageControl.currentPage = self.index
//    }

}

PageViewController中的Swift4自动页面控件在显示时会出现毛刺动画

0 个答案: