Question

在我的UIPageViewController我想在从一个页面拖动到另一个页面时设置不同的背景颜色。所以我的默认颜色会在那里，但会在不同的索引转换上显示不同的颜色。在我UIPageViewControllerDelegate下的那一刻，我得到了当前页面的索引号：

func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {

        if let firstViewController = viewControllers?.first,
            let index = orderedViewControllers.index(of: firstViewController) {
            viewControllerDelegate?.pageViewController(pageViewController: self, didUpdatePageIndex: index)

            if index == 0 {

                (parent as? MainViewController)?.container.backgroundColor = UIColor.red
            }
            else if index == 1 {

                (parent as? MainViewController)?.container.backgroundColor = UIColor.black
            }

        }


    }

但是如何在它们之间设置颜色。

Answer 1

在 didFinishLaunchingWithOptions

中添加此内容

UIPageControl *pageControl = [UIPageControl appearance];
pageControl.pageIndicatorTintColor = [UIColor blueColor];
pageControl.currentPageIndicatorTintColor = [UIColor redColor];
pageControl.backgroundColor = [UIColor blackColor];

如果要设置外观，请添加以下行：

UIPageControl *pageControl = [UIPageControl appearanceWhenContainedIn:[MyViewController class], nil];

Answer 2

您在阵列中的颜色

  let Array: [(name: String, color: UIColor)] = [("Red", UIColor.red), ("Blue",     UIColor.blue),("Green", UIColor.green)]

  print( Array[index]) // index is Your array indexNumber.

并以背景颜色传递此数组值

  (parent as? MainViewController)?.container.backgroundColor = [Pass this array index color]

如何在UIPageViewController

2 个答案: