Swift - 短信发送功能的实现

import UIKit
import MessageUI

class ViewController: UIViewController ,UINavigationControllerDelegate,
MFMessageComposeViewControllerDelegate{

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        //首先要判断设备具不具备发送短信功能
        if MFMessageComposeViewController.canSendText(){
            let controller = MFMessageComposeViewController()
            //设置短信内容
            controller.body = "短信内容：欢迎来到hangge.com"
            //设置收件人列表
            controller.recipients = ["123456","120000"]
            //设置代理
            controller.messageComposeDelegate = self
            //打开界面
            self.presentViewController(controller, animated: true, completion: { () -> Void in
            
            })
        }else{
            println("本设备不能发送短信")
        }
    }
    
    //发送短信代理
    func messageComposeViewController(controller: MFMessageComposeViewController!,
        didFinishWithResult result: MessageComposeResult) {
        controller.dismissViewControllerAnimated(true, completion: nil)
        switch result.value{
            case MessageComposeResultSent.value:
                println("短信已发送")
            case MessageComposeResultCancelled.value:
                println("短信取消发送")
            case MessageComposeResultFailed.value:
                println("短信发送失败")
            default:
                break
        }
    }

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