swift - UIAlertController 按钮单击导航到 NavigationController 的第一个 ViewController

Question

我是 swift 和 iOS 编程新手。我有 StartViewController，它有一个按钮，当单击带有两个按钮的 UIAlertController 时 - 拒绝 和 接受。当点击接受时，我想导航到MyNavigationController的 - ViewController。 MyNavigationController 有四个 ViewController，我使用滑动菜单导航到它们。

我附上了示例代码和 Storyboard的屏幕截图以供引用。

 @IBAction func showAlert() {

    let alertController = UIAlertController(title: "Disclaimer", message: "Before using this teaching resource, you confirm that you agree:\n1. To obey the law regarding data protection and patient confidentiality.\n2. To us this app professionally and appropriately in clinical settings.\n3. This is for your personal use and you may not modify, distribute, publish, transfer any information obtained from this teaching resource without the developers' permission.\n4. In no event shall the developer be liable to you for any loss arising from your use of this resource.", preferredStyle: .Alert)


    let declineAction = UIAlertAction(title: "Decline", style: .Cancel, handler: nil)
    alertController.addAction(declineAction)

    let acceptAction = UIAlertAction(title: "Accept", style: .Default) { (_) -> Void in

             //I think the code to navigate should go here, help please.

    }

    alertController.addAction(acceptAction)

    presentViewController(alertController, animated: true, completion: nil)

}

Storyboard屏幕截图 -

在上面的屏幕截图中，登录按钮将打开一个 UIAlertController alertController。此 AlertController 上的“Accept”按钮应导航至“MyNavigationController”上的“ViewController”。

这个MyNavigationController还有另外三个ViewController，它们使用滑动菜单进行导航。

提前谢谢您。

Answer 1

您需要在当前 View Controller 和目标 View Controller 之间创建一个segue，并确保segue ID与您的performSegueWithIdentifier调用中的id匹配

@IBAction func showAlert() {

    let alertController = UIAlertController(title: "Disclaimer", message: "Before using this teaching resource, you confirm that you agree:\n1. To obey the law regarding data protection and patient confidentiality.\n2. To us this app professionally and appropriately in clinical settings.\n3. This is for your personal use and you may not modify, distribute, publish, transfer any information obtained from this teaching resource without the developers' permission.\n4. In no event shall the developer be liable to you for any loss arising from your use of this resource.", preferredStyle: .Alert)

    let declineAction = UIAlertAction(title: "Decline", style: .Cancel, handler: nil)
    let acceptAction = UIAlertAction(title: "Accept", style: .Default) { (_) -> Void in    

        self.performSegueWithIdentifier("SomeSegue", sender: self) // Replace SomeSegue with your segue identifier
    }

    alertController.addAction(declineAction)
    alertController.addAction(acceptAction)

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