ios - 点击 pageControl 滚动到另一个 View (点击圆点)

Question

我已经设置了具有 2 个 View 的 PageViewControll。我能够在 View 之间移动，并且 pageControl(点)对应于正确的页面 - 但是点击点不会滚动到正确的 View 。

我在这里找到了关于如何创建函数的几个答案，但无法成功实现以使其工作。页面 Controller 的代码如下(没有点击功能)完整的代码是:

func configurePageControl() {
        pageControl = UIPageControl(frame: CGRect(x: 0,y: UIScreen.main.bounds.maxY - 50,width: UIScreen.main.bounds.width,height: 50))
        self.pageControl.numberOfPages = viewControllerList.count
        self.pageControl.currentPage = 0
        self.pageControl.alpha = 0.5
        self.pageControl.tintColor = UIColor.white
        self.pageControl.pageIndicatorTintColor = UIColor.black
        self.pageControl.currentPageIndicatorTintColor = UIColor.white
        self.view.addSubview(pageControl)


    }

        @IBAction func pageControltapped(_ sender: Any) {
        guard let pageControl = sender as? UIPageControl else { return }
        let selectedPage = pageControl.currentPage
        self.setViewControllers([viewControllerList[selectedPage]], direction: .forward, animated: true, completion: nil)
    }


    }

感谢您的帮助!!

Answer 1

1. 您需要为 pageControl 创建 IBAction，您可以从中检测哪个点被点击。

2. 然后，您需要使用 setViewControllers(_:direction:animated:completion:) 方法以编程方式滚动页面。

   func setViewControllers(_ viewControllers: [UIViewController]?, 
         direction: UIPageViewController.NavigationDirection, 
          animated: Bool, 
        completion: ((Bool) -> Void)? = nil)
   

   Here's the link to documentation

使用以下代码:

@IBAction func pageControltapped(_ sender: Any) {
    guard let pageControl = sender as? UIPageControl else { return }
    let selectedPage = pageControl.currentPage
    self.setViewControllers([viewControllerList[selectedPage]], direction: .forward, animated: true, completion: nil)
}

为 pageControl 添加目标以将其与 IBAction 链接:

func configurePageControl() {
    //...your code as it is....
    //add following line
    self.pageControl.addTarget(self, action: #selector(pageControltapped(_:)), for: .touchUpInside)
}