Ios 在PageViewController中打开特定的视图控制器

我目前正在开发一个iOS应用程序，它有3个视图控制器，可以通过左右滑动来访问

我想让“WeatherVC”作为应用程序启动时显示的视图控制器，我正在努力弄清楚这一点。 我还希望选项卡之间的具体顺序为：选项卡1=ClimaVC-选项卡2=WeatherVC-选项卡3=ClosetVC

以下是迄今为止我的代码，以及我的3个视图控制器：

import UIKit

class PageViewController: UIPageViewController, 
UIPageViewControllerDelegate, UIPageViewControllerDataSource {

lazy var orderedViewControllers : [UIViewController] = {
return [self.newVC(viewController : "ClimaVC"),
        self.newVC(viewController : "WeatherVC"),
    self.newVC(viewController : "ClosetVC")]
}()



override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.

    self.dataSource = self



    //If let to check if firstViewController is not nil to use it.
                if let firstViewController = orderedViewControllers.first{
                    setViewControllers([firstViewController],
                                       direction: .forward, animated: true, completion: nil)

            }

    self.delegate = self
}


func newVC(viewController : String) -> UIViewController {

    return UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: viewController)


}

func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {

    //Guard = some kind of if statement.
    guard let viewControllerIndex = orderedViewControllers.index(of: viewController) else {
        return nil
    }

    let previousIndex = viewControllerIndex - 1;

    guard previousIndex >= 0 else {
       // return orderedViewControllers.last
        //Return nil to avoid swiping forever.
        return nil
    }

    guard orderedViewControllers.count > previousIndex else {
        return nil
    }

    return orderedViewControllers[previousIndex]

}

func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {

    //Guard = some kind of if statement.
    guard let viewControllerIndex = orderedViewControllers.index(of: viewController) else {
        return nil
    }

    let nextIndex = viewControllerIndex + 1;

    guard orderedViewControllers.count != nextIndex else {
        //return orderedViewControllers.first
        //Return nil to avoid swiping forever.
        return nil
    }

    guard orderedViewControllers.count > nextIndex else {
        return nil
    }

    return orderedViewControllers[nextIndex]

}

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

}

任何帮助都将不胜感激，因为我无法理解这一点&我花了相当多的时间尝试

谢谢大家

你可以试试

setViewControllers([orderedViewControllers[1]],
                                   direction: .forward, animated: true, completion: nil)

---

为什么不试试UICollectionView呢？

---

UIPageViewController有一些问题，本例不需要UIPageViewController

编辑按钮似乎不起作用，因此我将把它放在这里。我想要的标签之间的顺序是ClimaVC-WeatherVC-ClosetVC。非常感谢，它成功了！我觉得我尝试了这个选项，因为我知道OrderedViewController是一个数组，但我一定没有立即这样做。再大一次！