Swift - 告警框(UIAlertView)的用法

1,下面代码创建并弹出一个告警框,并带有“取消”“确定”两个按钮
(注:自IOS8起,建议使用UIAlertController。点击查看UIAlertController的用法)

class ViewController: UIViewController{
override func viewDidLoad() {
super.viewDidLoad()

    let alertView = UIAlertView()
    alertView.title = "系统提示"
    alertView.message = "您确定要离开hangge.com吗?"
    alertView.addButtonWithTitle("取消")
    alertView.addButtonWithTitle("确定")
    alertView.cancelButtonIndex=0
    alertView.delegate=self;
    alertView.show()
}

func alertView(alertView:UIAlertView, clickedButtonAtIndex buttonIndex: Int){
    if(buttonIndex==alertView.cancelButtonIndex){
        print("点击了取消")
    }
    else
    {
        print("点击了确认")
    }
}

}

2,告警框有下面4种样式
Default:默认样式
PlainTextInput:带输入框的告警框
SecureTextInput:带密码框的告警框
LoginAndPasswordInput:带输入框和密码框的告警框

下面是一个使用输入框和密码框的告警框样例:
原文:Swift - 告警框(UIAlertView)的用法

import UIKit

class ViewController: UIViewController {

var alertView = UIAlertView()
 
override func viewDidLoad() {
    super.viewDidLoad()
     
    alertView.title = "系统登录"
    alertView.message = "请输入用户名和密码!"
    alertView.addButtonWithTitle("取消")
    alertView.addButtonWithTitle("确定")
    alertView.cancelButtonIndex=0
    alertView.delegate=self;
    alertView.alertViewStyle = UIAlertViewStyle.LoginAndPasswordInput
    alertView.show()
}
 
func alertView(alertView:UIAlertView, clickedButtonAtIndex buttonIndex: Int){
    if(buttonIndex==alertView.cancelButtonIndex){
        print("点击了取消")
    }
    else
    {
        let name = alertView.textFieldAtIndex(0)
        let password = alertView.textFieldAtIndex(1)
        print("用户名是:\(name!.text) 密码是:\(password!.text)")
    }
}

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

}

原文出自:www.hangge.com 转载请保留原文链接:http://www.hangge.com/blog/cache/detail_537.html

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