Swift免费短信验证码实现及动态倒计时功能

#import <SMS_SDK/SMSSDK.h> 

SMSSDK.registerApp(你的appKey withSecret: 你的appSecret) 

// // ViewController.swift // Yundou // // Created by Slow on 16/1/2. // Copyright (c) 2016年 Ivan. All rights reserved. // import UIKit class ViewController: UIViewController {   @IBOutlet weak var getAuthCodeButton: UIButton!   //验证码文本框   @IBOutlet weak var authCodeText: UITextField!   //手机号码文本框   @IBOutlet weak var phoneText: UITextField!   override func viewDidLoad() {     super.viewDidLoad()     // Do any additional setup after loading the view, typically from a nib.   }   override func didReceiveMemoryWarning() {     super.didReceiveMemoryWarning()     // Dispose of any resources that can be recreated.   }   //获取验证码   @IBAction func getAuthCode(sender: UIButton) {     var phoneNum = phoneText.text     SMSSDK.getVerificationCodeByMethod(SMSGetCodeMethodSMS, phoneNumber:phoneNum, zone: "86",customIdentifier: nil,result: {(error: NSError!) ->Void in       if(error == nil){         NSLog("发送成功")         self.countDown(60)       }else{         NSLog("发送失败！%@" , error)       }     })   }   //提交验证码   @IBAction func submitAuthCode(sender: UIButton) {     var authCode = authCodeText.text     var phoneNum = phoneText.text     var resultMessage = ""     SMSSDK.commitVerificationCode(authCode, phoneNumber: phoneNum, zone: "86" ,       result:{ (error: NSError!) -> Void in         if(error == nil){           resultMessage = "恭喜您，验证成功！"           NSLog("验证成功")         }else{           resultMessage = "很抱歉，验证失败！"           NSLog("验证失败！" , error)         }         let resultAlertView:UIAlertView = UIAlertView(title: "验证结果", message: resultMessage, delegate: nil, cancelButtonTitle: "确定")         resultAlertView.show()     })   }   //验证码倒计时   func countDown(timeOut:Int){     //倒计时时间     var timeout = timeOut     var queue:dispatch_queue_t = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);     var _timer:dispatch_source_t = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue)     dispatch_source_set_timer(_timer, dispatch_walltime(nil, 0), 1*NSEC_PER_SEC, 0)     //每秒执行     dispatch_source_set_event_handler(_timer, { () -> Void in       if(timeout<=0){ //倒计时结束，关闭         dispatch_source_cancel(_timer);         dispatch_sync(dispatch_get_main_queue(), { () -> Void in           //设置界面的按钮显示 根据自己需求设置           self.getAuthCodeButton.setTitle("再次获取", forState: UIControlState.Normal)         })       }else{//正在倒计时         var seconds = timeout % 60         var strTime = NSString.localizedStringWithFormat("%.2d", seconds)         dispatch_sync(dispatch_get_main_queue(), { () -> Void in //          NSLog("----%@", NSString.localizedStringWithFormat("%@S", strTime) as String)           UIView.beginAnimations(nil, context: nil)           UIView.setAnimationDuration(1)           //设置界面的按钮显示 根据自己需求设置           self.getAuthCodeButton.setTitle(NSString.localizedStringWithFormat("%@S", strTime) as String, forState: UIControlState.Normal)           UIView.commitAnimations()           self.getAuthCodeButton.userInteractionEnabled = false         })         timeout--;       }     })     dispatch_resume(_timer)   } }