ios - 显示自定义消息的 Swift UIAlertController

Question

我有一个 ViewController 类，它的唯一目的是显示一 strip 有自定义消息和标题的警报消息，该消息通过自定义初始化消息传入。一旦 View 出现，就会在 viewDidLoad 中完成此操作。然而，我的问题是，当涉及到这个 View 时，它会弹出并永远停留在这个 View 中，而不是仅仅将 View 放在另一个 View 之上。我不确定如何解决这个问题。这是我的 alertVC 类的代码

import UIKit

class AlertVC: UIViewController {

  var myMessage: String?
  var myTitle: String?

  override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
  }

  override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
  }


  override func viewDidAppear(animated: Bool){
    let alertController = UIAlertController(title: myTitle, message: myMessage, preferredStyle: .Alert)
    let OKAction = UIAlertAction(title: "OK", style: .Default) {
        (action: UIAlertAction) in print("Youve pressed OK Button")
    }
    alertController.addAction(OKAction)
    self.presentViewController(alertController, animated: true, completion: nil)
  }

  convenience init(title: String, message: String){
    self.init()
    self.myTitle = title
    self.myMessage = message
  }
}

这是我如何为此创建对象并尝试展示它的代码。

let alert = AlertVC(title: "Error", message: "error")
presentViewController(alert, animated: true, completion: nil)

感谢任何帮助，如果您需要更多信息，请发表评论。谢谢!

Answer 1

为什么不只是一个扩展？

extension UIViewController {

  func presentAlert(withTitle title: String, message : String) {
    let alertController = UIAlertController(title: title, message: message, preferredStyle: .alert)
    let OKAction = UIAlertAction(title: "OK", style: .default) { action in
        print("You've pressed OK Button")
    }
    alertController.addAction(OKAction)
    self.present(alertController, animated: true, completion: nil)
  }
}

并用

调用它

presentAlert(withTitle: "Error", message: "error")

在任何 UIViewController 类中