Swift

Question

当按钮处于警报状态时如何显示或link到新ViewController？

这是我的代码

let alert = UIAlertController(title: validateQRObj.responseDescription, message: validateQRObj.productName, preferredStyle: .alert)
let action = UIAlertAction(title: "OK", style: .default) { (action) -> Void in
    let viewController = self.storyboard?.instantiateViewController(withIdentifier: "ProductDetialViewController")
    self.present(viewController!, animated: true, completion: nil)
}
alert.addAction(action)
self.present(alert, animated: true, completion: nil)

Answer 1

控制从 View Controller 1（黄点）拖动到 View Controller 2 上的任意位置，然后单击 Segue。显示 Attributes inspector 和 Under Storyboard Segue identifier name the identifier VC2

如果这是您正在寻找的答案，请不要忘记排除答案。

func alert(){

    let alertController = UIAlertController(title: "Open View Controller. ", message: "Press  Ok  to open View Controller number 2.", preferredStyle: UIAlertControllerStyle.alert)
    let ok = UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: {(action) -> Void in
    //The (withIdentifier: "VC2") is the Storyboard Segue identifier.
    self.performSegue(withIdentifier: "VC2", sender: self)
 })

    alertController.addAction(ok)
    self.present(alertController, animated: true, completion: nil)
}

Answer 2

对我来说它不起作用。我做了：

    func alert(){
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let twop = storyboard.instantiateViewController(withIdentifier: "Accueil") as! Accueil
    let alertController = UIAlertController(title: "Open new View !", message: "Clic to ok", preferredStyle: UIAlertControllerStyle.alert)
    let ok = UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: {(action) -> Void in
        self.navigationController?.show(twop, sender: self)
    })

    alertController.addAction(ok)
    self.present(alertController, animated: true, completion: nil)
}

现在可以使用了！！

Swift - 推送警报操作以显示新 ViewController

Swift - push alert action to show new ViewController

ios

uialertcontroller