ios - 如何从子 UIViewController 到父 UIViewController 并从那里到另一个子 UIViewController

Question

我有一个父 UIViewController(MainVC)。从那里我有 2 个 segue 到 2 个 UIViewControllers:FirstVC(标识符:goFirstVC)和 SecondVC(标识符:goSecondVC )在 FirstVC 中，我有一个按钮 Save，当我点击它时，我想关闭 FirstVC 并继续 SecondVC.

这是我的代码:

 @IBAction func saveBtnTapped(_ sender: UIButton) {

   //navigationController?.popViewController(animated: true)

   let destinationController = self.storyboard?.instantiateViewController(withIdentifier: "goSecondVC") as! SecondVC
    let presentingVC = self.presentingViewController
    self.dismiss(animated: false, completion: { () -> Void   in
    presentingVC!.present(destinationController, animated: true, completion: nil)
    })
}

这是我的问题的设计:

Answer 1

您可以使用setViewControllers 只保留父对象和SecondVC

let destinationController = self.storyboard?.instantiateViewController(withIdentifier: "goSecondVC") as! SecondVC

self.navigationController?.setViewControllers([self.navigationController!.viewControllers.first!,destinationController], animated: true)