到目前为止，这是我的代码:

class WarmPushPageViewController: UIPageViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.dataSource = self
        // Do any additional setup after loading the view.
        let feedViewController = storyboard!.instantiateViewController(withIdentifier: "FeedViewController")
        setViewControllers([feedViewController], direction: .forward, animated: false, completion: nil)

        let hashtagsButton = UIButton(frame: CGRect(x: 8, y: self.view.frame.height - 30, width: 70, height: 20))
        hashtagsButton.setTitle("Hashtags", for: .normal)
        hashtagsButton.tintColor = UIColor.blue
        self.view.addSubview(hashtagsButton)
        self.view.bringSubview(toFront: hashtagsButton)

        let feedButton = UIButton(frame: CGRect(x: self.view.frame.width/2, y: self.view.frame.height - 30, width: 50, height: 20))
        feedButton.setTitle("Feed", for: .normal)
        feedButton.tintColor = UIColor.blue
        self.view.addSubview(feedButton)
        self.view.bringSubview(toFront: feedButton)

        let userButton = UIButton(frame: CGRect(x: self.view.frame.width-65, y: self.view.frame.height - 30, width: 50, height: 20))
        userButton.setTitle("User", for: .normal)
        userButton.tintColor = UIColor.blue
        self.view.addSubview(userButton)
        self.view.bringSubview(toFront: userButton)
    }

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


    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

extension WarmPushPageViewController: UIPageViewControllerDataSource {
    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
        if let _ = viewController as? UserViewController {
            let feedViewController = storyboard!.instantiateViewController(withIdentifier: "FeedViewController")
            return feedViewController
        } else if let _ = viewController as? FeedViewController {
            let hashtagsViewController = storyboard!.instantiateViewController(withIdentifier: "HashtagsViewController")
            return hashtagsViewController
        }
        return nil
    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
        if let _ = viewController as? HashtagsViewController {
            let feedViewController = storyboard!.instantiateViewController(withIdentifier: "FeedViewController")
            return feedViewController
        } else if let _ = viewController as? FeedViewController {
            let userViewController = storyboard!.instantiateViewController(withIdentifier: "UserViewController")
            return userViewController
        }
        return nil
    }
}

出于某种原因，一旦我到达末页的边缘，标签就会出现在边缘:

Hashtag Label

标签也出现在我的 View 层次结构中，但我的假设是问题可能出在此处:

View Hierarchy

最终目标是使用 Sketch Assets 创建我自己的自定义按钮，在其中触摸特定按钮的内部将转到相应的页面。

最佳答案

1. viewDidLoad 时 View 框架是实际的界面生成器默认框架。所以按钮可能会越界。尝试通过设置中心框架按钮可见或在 viewDidLoad 中添加按钮并在 viewDidLayoutSubviews 方法中更新按钮框架。
2. UIPageViewController 包含一个手势识别器。所以加按钮也没用。 满足您需求的建议方法 不是将 UIButton 添加到 UIPageViewController，而是创建一个包含 subview 作为 UIButtons 和 UIPageViewController 的 super View Controller (UIViewController)。

引用链接:https://spin.atomicobject.com/2016/02/11/move-uipageviewcontroller-dots/

iOS: UIPageViewController - Use button to jump to next page

关于ios - 尝试向 UIPageViewController 添加按钮，但按钮不会显示，即使它们在 View 层次结构中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41189092/