同一视图控制器中每个视图的不同转换效果如何实现？

要实现同一视图控制器中每个视图的不同转换效果，可以使用UIPageViewController和其代理方法。

首先，将UIPageViewController添加到视图控制器的一个子视图中，并设置其代理属性为视图控制器。然后，为每个视图创建一个UIViewController，设置其内容，并作为UIPageViewController的子控制器添加。最后，实现UIPageViewControllerDelegate的方法来自定义每个视图的转换效果。

以下是一些示例代码：

class MyViewController: UIViewController, UIPageViewControllerDelegate, UIPageViewControllerDataSource {
    
    var pageViewController: UIPageViewController!
    var viewControllersArray: [UIViewController] = []
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Add UIPageViewController as subview
        pageViewController = UIPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
        pageViewController.delegate = self
        pageViewController.dataSource = self
        pageViewController.view.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(pageViewController.view)
        
        // Add child view controllers to UIPageViewController
        let firstVC = storyboard?.instantiateViewController(withIdentifier: "FirstVC")
        let secondVC = storyboard?.instantiateViewController(withIdentifier: "SecondVC")
        let thirdVC = storyboard?.instantiateViewController(withIdentifier: "ThirdVC")
        
        viewControllersArray = [firstVC!, secondVC!, thirdVC!]
        
        pageViewController.setViewControllers([firstVC!], direction: .forward, animated: false, completion: nil)
        
        addChild(pageViewController)
        view.addConstraints([
            pageViewController.view.topAnchor.constraint(equalTo: view.topAnchor),
            pageViewController.view.bottomAnchor.constraint(equalTo: view.bottomAnchor),
            pageViewController.view.leftAnchor.constraint(equalTo: view.leftAnchor),
            pageViewController.view.rightAnchor.constraint(equalTo: view.rightAnchor)
        ])
        pageViewController.didMove(toParent: self)
    }
    
    // UIPageViewControllerDataSource methods
    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
        guard let viewControllerIndex = viewControllersArray.firstIndex(of: viewController) else {