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Important: UIAlertView is deprecated in iOS 8. (Note that UIAlertViewDelegate is also deprecated.) To create and manage alerts in iOS 8 and later, instead use UIAlertController with a preferredStyle ofUIAlertControllerStyleAlert.
在Xcode7中使用UIAlertView会报如下警告:
‘UIAlertView‘ was deprecated in iOS 9.0: UIAlertView is deprecated. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead
Alert Views ： Alert views display a concise and informative alert message to the user.
UIAlertController 同时替代了 UIAlertView 和 UIActionSheet，从系统层级上统一了 alert 的概念 —— 即以 modal 方式或 popover 方式展示。
// ViewController.swift
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//创建一个Button
let button = UIButton(type: UIButtonType.Custom) //初始化UIButton
button.frame = CGRectMake(50, 100, 150, 50) //创建一个CGRect, 设置位置和大小
button.backgroundColor = UIColor.greenColor() //设置背景色
button.setTitle("点击显示弹窗", forState: UIControlState.Normal) //设置标题
//传递触摸对象(点击事件)
button.addTarget(self, action: "buttonPressed:", forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(button)
}
// Action
func buttonPressed(sender: UIButton) {
showAlertReset()
}
func showAlertDefault(){
let alertController = UIAlertController(title: "弹窗标题", message: "Hello, 这个是UIAlertController的默认样式", preferredStyle: UIAlertControllerStyle.Alert)
let cancelAction = UIAlertAction(title: "取消", style: UIAlertActionStyle.Cancel, handler: nil)
let okAction = UIAlertAction(title: "好的", style: UIAlertActionStyle.Default, handler: nil)
let resetAction = UIAlertAction(title: "重置", style: UIAlertActionStyle.Destructive, handler: nil)
alertController.addAction(resetAction)
alertController.addAction(cancelAction)
alertController.addAction(okAction)
self.presentViewController(alertController, animated: true, completion: nil)
}
func showAlertReset(){
let alertControl = UIAlertController(title: "弹窗的标题", message: "Hello,showAlertReset ", preferredStyle: UIAlertControllerStyle.Alert)
let cancelAction = UIAlertAction(title: "取消操作", style: UIAlertActionStyle.Destructive, handler: nil)
let okAction = UIAlertAction(title: "好的", style: UIAlertActionStyle.Default, handler: nil)
alertControl.addAction(cancelAction)
alertControl.addAction(okAction)
self.presentViewController(alertControl, animated: true, completion: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
参考：
http://www.jianshu.com/p/86f933850df8
http://blog.csdn.net/xiaowenwen1010/article/details/40108097
[Swift]UIKit学习之警告框:UIAlertController和UIAlertView
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原文地址：http://my.oschina.net/u/2395711/blog/520142
