下面我們一起來看一篇關於ios開發之swift彈窗大全例子，希望此例子能夠幫助到各位朋友。  代碼如下 復制代碼 //
//  ViewController.swift
//  Tanchu
//
//  Created by 房允麒 on 15/12/1.
//  Copyright (c) 2015年 JS. All rights reserved.
//
 
import UIKit
 
class ViewController: UIViewController {
    var alert1: UIAlertController!
    var alert2: UIAlertController!
    var actionSheet: UIAlertController!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        // 定義一個按鈕，顯示最簡單的 Alert
        let button1 = UIButton.buttonWithType(.System) as! UIButton
        button1.frame = CGRectMake(self.view.frame.width/2 - 200, 50, 400, 50)
        button1.setTitle("最簡單的 Alert", forState: UIControlState.Normal)
        button1.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
        button1.tag = 1
 
        // 定義一個按鈕，顯示帶文本框的 Alert
        let button2 = UIButton.buttonWithType(.System) as! UIButton
        button2.frame = CGRectMake(self.view.frame.width/2 - 200, 150, 400, 50)
        button2.setTitle("帶文本框的 Alert", forState: UIControlState.Normal)
        button2.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
        button2.tag = 2
 
        // 定義一個按鈕，顯示上拉菜單
        let button3 = UIButton.buttonWithType(.System) as! UIButton
        button3.frame = CGRectMake(self.view.frame.width/2 - 200, 250, 400, 50)
        button3.setTitle("上拉菜單", forState: UIControlState.Normal)
        button3.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
        button3.tag = 3
 
        // 定義 cancel、ok、save、delete、reset 的 UIAlertAction
        var cancelAction = UIAlertAction(title: "cancel", style: UIAlertActionStyle.Cancel, handler: nil)
        var okAction = UIAlertAction(title: "ok", style: UIAlertActionStyle.Default){
            (action: UIAlertAction!) -> Void in
            println("you choose ok")
        }
        var saveAction = UIAlertAction(title: "save", style: UIAlertActionStyle.Default){
            (action: UIAlertAction!) -> Void in
            println("you choose save")
        }
        var deleteAction = UIAlertAction(title: "delete", style: UIAlertActionStyle.Destructive){
            (action: UIAlertAction!) -> Void in
            println("you choose delete")
        }
        var resetAction = UIAlertAction(title: "reset", style: UIAlertActionStyle.Destructive){
            (action: UIAlertAction!) -> Void in
            println("you choose reset")
        }
 
        // 1、初始化最簡單的 Alert
        alert1 = UIAlertController(title: "simple alert", message: "this is a simple alert", preferredStyle: UIAlertControllerStyle.Alert)
        alert1.addAction(cancelAction)
        alert1.addAction(resetAction)
        alert1.addAction(okAction)
 
        // 2、初始化帶文本框的 Alert
        alert2 = UIAlertController(title: "login alert", message: "please enter your name and password", preferredStyle: UIAlertControllerStyle.Alert)
        alert2.addTextFieldWithConfigurationHandler {
            (textField: UITextField!) -> Void in
            textField.placeholder = "name"
        }
        alert2.addTextFieldWithConfigurationHandler {
            (textField: UITextField!) -> Void in
            textField.placeholder = "password"
            textField.secureTextEntry = true
        }
        var loginAction = UIAlertAction(title: "login", style: UIAlertActionStyle.Default) {
            (action: UIAlertAction!) -> Void in
            var name = self.alert2.textFields!.first as! UITextField
            var password = self.alert2.textFields!.last as! UITextField
            println("name : \(name.text); password : \(password.text)")
        }
        alert2.addAction(loginAction)
 
        // 3、初始化上拉菜單
        actionSheet = UIAlertController(title: "simple action sheet", message: "action sheet message", preferredStyle: UIAlertControllerStyle.ActionSheet)
        actionSheet.addAction(cancelAction)
        actionSheet.addAction(deleteAction)
        actionSheet.addAction(saveAction)
 
        self.view.addSubview(button1)
        self.view.addSubview(button2)
        self.view.addSubview(button3)
        self.view.addSubview(button3)
    }
 
    /// 按鈕響應事件
    func buttonAction(sender: UIButton) {
        let num = sender.tag
        switch num {
        case 1:
            self.presentViewController(alert1, animated: true, completion: nil)
        case 2:
            self.presentViewController(alert2, animated: true, completion: nil)
        case 3:
            self.presentViewController(actionSheet, animated: true, completion: nil)
        default:
            break
        }
    }
 
 
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
 
 
}