swift-UIAlertController

//
//  ViewController.swift
//  Swift-普通警告框的使用
//
//  Created by 品德信息 on 2016/12/28.
//  Copyright © 2016年 品德信息. All rights reserved.
//
import UIKit
class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    //基本警告框的使用
    self.baseAlertController()
    //警告框的动作列表样式
    self.actionSheetController()
}
func actionSheetController()  {
    let btn = UIButton(type:UIButtonType.system)
    btn.frame = CGRect(x:20,y:220,width:200,height:44)
    btn.setTitle("Question", for: UIControlState())
    btn.addTarget(self, action: #selector(ViewController.showActionSheet), for: UIControlEvents.touchUpInside)
    btn.backgroundColor = UIColor.lightGray
    self.view.addSubview(btn)
}

func showActionSheet()  {
    let alert = UIAlertController(title:"Infomation",message:"你最喜欢干什么?",preferredStyle:UIAlertControllerStyle.actionSheet)
               
    let yes = UIAlertAction(title:"🐟",style:UIAlertActionStyle.default,handler:{(alerts:UIAlertAction) -> Void in
        //暂时理解为回调
        print("我喜欢吃鱼")
        
    })
        //         public convenience init(title: String?, style:     UIAlertActionStyle, handler: ((UIAlertAction) -> Swift.Void)? = nil)
    let no  = UIAlertAction(title:"hunting",style:UIAlertActionStyle.destructive,handler:{(alerts:UIAlertAction) -> Void in
        print("i like hunting")})
    
    let unKnown = UIAlertAction(title:"undo" ,style:UIAlertActionStyle.cancel,handler:{(alerts:UIAlertAction) -> Void in
        print("不知道什么操作")
    })
    
    
    alert.addAction(yes)
    alert.addAction(no)
    alert.addAction(unKnown)
    
    self.present(alert,animated: true,completion: nil)

}
func baseAlertController() {
    let btn = UIButton(type:UIButtonType.system)
    btn.frame = CGRect(x:20,y:120,width:200,height:44)
    btn.setTitle("Question", for: UIControlState())
    btn.addTarget(self, action: #selector(ViewController.alert), for: UIControlEvents.touchUpInside)
    btn.backgroundColor = UIColor.lightGray
    self.view.addSubview(btn)
}

func alert()  {
    let alert = UIAlertController(title:"Infomation",message:"Are you a student ?",preferredStyle:UIAlertControllerStyle.alert)

    let yes = UIAlertAction(title:"Yes",style:UIAlertActionStyle.default,handler:{(alerts:UIAlertAction) -> Void in
        //暂时理解为回调
        print("yes ,I'm a student")
        
    })

    let no  = UIAlertAction(title:"No",style:UIAlertActionStyle.default,handler:{(alerts:UIAlertAction) -> Void in
        print("No,I'm not a student")})
    let unKnown = UIAlertAction(title:"undo" ,style:UIAlertActionStyle.default,handler:{(alerts:UIAlertAction) -> Void in
         print("不知道什么操作")
    })
    alert.addAction(yes)
    alert.addAction(no)
    alert.addAction(unKnown)
    
    self.present(alert,animated: true,completion: nil)

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