如何删除最后一个实例化的ViewController，最后一个TableViewController变为活动状态

Question

我实例化了一个PageViewController并显示图像。

let storyboard = UIStoryboard(name: "Main", bundle: nil)
    self.pageViewController = storyboard.instantiateViewController(withIdentifier: "articlePageViewController") as! UIPageViewController
    self.pageViewController.dataSource = self
    let initialContenViewController = self.pageTutorialAtIndex(0) as ArticleImageViewController
    self.pageViewController.setViewControllers([initialContenViewController], direction: UIPageViewControllerNavigationDirection.forward, animated: true, completion: nil)



    self.pageViewController.view.frame = CGRect(x: 0, y: 0, width: Int(self.view.frame.width), height: Int(self.view.frame.height))
    self.pageViewController.view.center = self.mainView.center
    self.pageViewController.view.tag = 100
    self.addChildViewController(self.pageViewController)
    self.view.addSubview(self.pageViewController.view)
    self.pageViewController.didMove(toParentViewController: self)

ImageView中的图片：

现在我要删除Pageviewcontroller并点击按钮返回Maintableview。这是点击按钮的代码。

self.willMove(toParentViewController: nil)
self.view.removeFromSuperview()
self.removeFromParentViewController()

删除图像并显示Maintableviewcontroller但未激活。当我显示视图UI层次结构时，pageviewcontrollercontentview位于前面。

viewhierarchy：

如何删除它并返回Maintableviewcontroller？

Answer 1

很简单，你将pageviewcontroller添加为：

self.addChildViewController(self.pageViewController)   //===> Step 1
self.view.addSubview(self.pageViewController.view) //additional step required while adding
self.pageViewController.didMove(toParentViewController: self)   //===> Step 2

尝试：

    [self.pageViewController removeFromParentViewController];    //===> Reverse of Step 1
    [self.pageViewController didMoveToParentViewController:self];//===> Reverse of Step 2

来自PageViewController的调用如下：

    [self removeFromParentViewController];    //===> Reverse of Step 1
    [self didMoveToParentViewController:self.parentViewController];//===> Reverse of Step 2