Swift：从不同的视图控制器委托调用segue

我有一个viewcontroller，我从中调用一个popover，在popover中我有一个委托，它在主viewcontroller中调用一个函数

在这个函数中，我关闭popover并希望加载不同的视图控制器

如果我这样做的话，原来的popover的关闭是有效的

func KeypadDismissData(View: UIViewController, Password : String){
    View.dismissViewControllerAnimated(true, completion: nil)  
} 

但是，如果我尝试调用segue来加载带有代码的新视图控制器

func KeypadDismissData(View: UIViewController, Password : String){
    View.dismissViewControllerAnimated(true, completion: nil)
    self.performSegueWithIdentifier("LoginToMain", sender:nil)
}

我得到了错误

Warning: Attempt to present <UIViewController: 0x7fc768488900> on ... whose view is not in the window hierarchy!

你知道我该怎么解决这个问题吗

---

谢谢

我不确定是否了解您的问题，但我可以尝试：

您可以在MainViewController中打开一个popover。要解除此popover，请使用委托，在MainViewController中解除此popover。在弹出框关闭后，您需要切换到另一个视图

我重新创建了它，代码如下所示：

主视图控制器：

protocol DismissDelegate: class {
    func dismiss()
}

class ViewController: UIViewController, DismissDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func openButton(sender: UIButton) {
        let popoverViewController = storyboard?.instantiateViewControllerWithIdentifier("popoverViewController") as! PopoverViewController
        popoverViewController.modalPresentationStyle = .Popover
        popoverViewController.delegate = self
        popoverViewController.preferredContentSize = CGSize(width: 200, height: 260)
        popoverViewController.view.backgroundColor = UIColor.yellowColor()

        // Settings for the popover
        let popover = popoverViewController.popoverPresentationController!
        popover.sourceView = self.view
        popover.sourceRect = sender.frame
        popover.backgroundColor = UIColor.redColor()

        presentViewController(popoverViewController, animated: true, completion: nil)
    }

    func dismiss() {
        dismissViewControllerAnimated(true) {
            self.performSegueWithIdentifier("segue", sender: self)
        }
    }
}

class PopoverViewController: UIViewController {

    weak var delegate: DismissDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func dismissButton(sender: UIButton) {
        delegate?.dismiss()
    }
}

PopOverview控制器：

protocol DismissDelegate: class {
    func dismiss()
}

class ViewController: UIViewController, DismissDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func openButton(sender: UIButton) {
        let popoverViewController = storyboard?.instantiateViewControllerWithIdentifier("popoverViewController") as! PopoverViewController
        popoverViewController.modalPresentationStyle = .Popover
        popoverViewController.delegate = self
        popoverViewController.preferredContentSize = CGSize(width: 200, height: 260)
        popoverViewController.view.backgroundColor = UIColor.yellowColor()

        // Settings for the popover
        let popover = popoverViewController.popoverPresentationController!
        popover.sourceView = self.view
        popover.sourceRect = sender.frame
        popover.backgroundColor = UIColor.redColor()

        presentViewController(popoverViewController, animated: true, completion: nil)
    }

    func dismiss() {
        dismissViewControllerAnimated(true) {
            self.performSegueWithIdentifier("segue", sender: self)
        }
    }
}

class PopoverViewController: UIViewController {

    weak var delegate: DismissDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func dismissButton(sender: UIButton) {
        delegate?.dismiss()
    }
}

不同的是，我已经把segue放在了dismissViewControllerAnimated的末尾