如何使PageviewController的背景透明

Question

如何使Pageviewcontroller背景透明，我在这里尝试使其透明

  super.viewDidLoad()

    self.pageviewcontroller = self.storyboard?.instantiateViewController(withIdentifier: "PageViewController") as! UIPageViewController
    self.pageviewcontroller.dataSource = self
    self.pageviewcontroller.delegate = self
    var pageControl = UIPageControl()
    pageControl = UIPageControl.appearance()
    pageControl.backgroundColor = .clear
    pageControl.pageIndicatorTintColor = .gray
    pageControl.currentPageIndicatorTintColor = UIColor(red: 0.00, green: 1.0, blue: 1.0, alpha: 1.0)
   pageControl.backgroundColor = UIColor.clear

    ViewControllers.append(
        UIStoryboard(name: "Main", bundle: nil) .
            instantiateViewController(withIdentifier: "DashboardViewController") as! BaseViewController)




    ViewControllers.append(
        UIStoryboard(name: "Main", bundle: nil) .
            instantiateViewController(withIdentifier: "qwertyViewController") as! BaseViewController)
    if let firstViewController = ViewControllers.first {

Answer 1

我已经测试了以下代码，并且可以正常工作

这是我的控制器类：

class PageViewController: UIPageViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate {

在该类中，我创建了此变量：

lazy var pageArra: [UIViewController] = {
       return[self.VCInstance("ONE"),self.VCInstance("TWO"),self.VCInstance("THREE"),self.VCInstance("FOUR")]
    }()

使用此功能获取情节提要资产。 我给了4个ViewControllers上面列出的ID

private func VCInstance(_ name: String) -> UIViewController {
        return UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: name)
    }

这是我的viewDidLoad：

override func viewDidLoad() {
    super.viewDidLoad()
    dataSource = self
    delegate = self
    var pageControl = UIPageControl()
    pageControl = UIPageControl.appearance()
    pageControl.pageIndicatorTintColor = .gray
    pageControl.currentPageIndicatorTintColor = UIColor(red: 0.00, green: 1.0, blue: 1.0, alpha: 1.0)
}

这就是我如何在加载时清除它

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    if view is UIScrollView {
            view.frame = UIScreen.main.bounds
        } else if view is UIPageControl {
            view.backgroundColor = .clear
        }
}

加上所有数据源并委托必需的方法