Question

在这里，我要解散一个VC，并尝试浏览新的VC，但是导航不起作用。关闭VC正常工作。

@IBAction func onClickEmailBtn(_ sender: UIButton) {
    //dismiss VC
    self.dismiss(animated: false, completion: nil)
    //Navigate to VC
    DispatchQueue.main.async {
        let cevc = self.storyboard?.instantiateViewController(withIdentifier: "CEVC") as! EmailViewController
        self.navigationController?.pushViewController(cevc, animated: true)
    }
}

在这里，我有一个名为VC1的NavigationViewController，在那上面我展示了一个名为VC2的VC。在此VC2中，当我单击按钮时，我要浏览名为EmailVC的新VC。

Answer 1

尝试此代码

@IBAction func onClickEmailBtn(_ sender: UIButton) {

    if let controller = self.storyboard?.instantiateViewController(withIdentifier: "CEVC") as! EmailViewController {
         self.dismiss(animated: false, completion: nil)
         self.presentingViewController?.present(controller, animated: true, completion: nil)
    }
}

Answer 2

您试图推动ViewVontroller关闭视图控制器，并且您已经接受的答案是从关闭viewController中呈现一个viewController。尽管这可能会达到您的目的，但我将为您解答原始问题

   // get the object of presenting nanvigation controller(navigation controller with has presented this view controller)
    let presentingNavigationController = presentingViewController?.navigationController
    dismiss(animated: true) {
        let cevc = self.storyboard?.instantiateViewController(withIdentifier: "CEVC") as! EmailViewController
        // here you push your view controller with presentingNavigationController
        presentingNavigationController?.pushViewController(cevc, animated: true)
    }

Answer 3

尝试使用以下代码找出导航控制器，并将 Viewcontroller 替换为您的控制器名称。

let productVC = SeconViewViewController()
let parentVC = (parent!.presentingViewController as! ViewController).childViewControllers.first as! UINavigationController
self.navigationController?.dismiss(animated: true, completion: {
     parentVC.pushViewController(productVC, animated: true)
})

导航到ViewController并关闭VC

3 个答案: