ios - 全局使用单个完成处理程序

Question

我有一个只有三个按钮的自定义警报 Controller ，我有三个按钮取消、发送、添加，但我想要如下所示的单个完成处理程序。

self.showAlertWithButtonClicked(clickedButton: { (clickedButton) -> Void in
        //check the button index by clickedButton.tag

        })

但是当我尝试将其实现到我的 AlertController 类中时，它不允许我这样做。下面是我的 MyAlertController 线框代码:

class MyAlertController: UIViewController {


typealias CompletionHandler = (_ clickedButton: UIButton) -> Void
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
}

func showAlertWithButtonClicked(clickedButton: @escaping (MultipleMethodRunningHandle)) {
    //Do what you want

}

func pressedCancelButton(button: UIButton) {
    //At this point compiler doesn't allow me to use that completionHandler globally in the class
    button.tag = 0
    clickedButton(button)
}
func pressedSendButton(button: UIButton) {
    //At this point compiler doesn't allow me to use that completionHandler globally in the class
    button.tag = 1
    clickedButton(button)
}
func pressedAddButton(button: UIButton) {
    //At this point compiler doesn't allow me to use that completionHandler globally in the class
    button.tag = 2
    clickedButton(button)
}

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

如何实现这一点，以便我可以访问整个类中的这些处理程序。

Answer 1

只需粘贴我的代码即可。

//
//  ViewController.swift
//  Touristan
//
//  Created by Syed Qamar Abbas on 21/01/2017.
//  Copyright © 2017 Syed Qamar Abbas. All rights reserved.
//

import UIKit

typealias MultipleMethodRunningHandle = (_ clickedButton: UIButton) -> Void

class ViewController: UIViewController {

    var buttonClicked: MultipleMethodRunningHandle?

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

    func showAlertWithButtonClicked(clickedButton: @escaping (MultipleMethodRunningHandle)) {
        //Do what you want
        self.buttonClicked = clickedButton
    }

    func pressedCancelButton(button: UIButton) {
        //Do what you want
        button.tag = 0
        self.buttonClicked!(button)
    }

    func pressedSendButton(button: UIButton) {
        //Do what you want
        button.tag = 1
        self.buttonClicked!(button)
    }

    func pressedAddButton(button: UIButton) {
        //Do what you want
        button.tag = 2
        self.buttonClicked!(button)
    }

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