使用未声明的类型'MFMessageComposeViewControllerDelegate swift'

Question

我想实现使用MFMessageComposeViewController对象发送文本消息。但是当我试图声明MFMessageComposeViewControllerDelegate协议。在ViewController.swift我得到以下错误：使用未声明的类型 'MFMessageComposeViewControllerDelegate迅速'

ViewController.swift的：

class ViewController: UIViewController, MFMessageComposeViewControllerDelegate { 

@IBAction func sendMessage(sender: AnyObject) { 
    var messageVC = MFMessageComposeViewController() 

    messageVC.body = "Enter a message"; 
    messageVC.recipients = ["Enter tel-nr"] 
    messageVC.messageComposeDelegate = self; 

    self.presentViewController(messageVC, animated: false, completion: nil) 
} 


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. 
} 
} 

有人可以帮我吗？

Answer 1

添加MessageUI框架，

import UIKit 
import MessageUI 

class ViewController: UIViewController, MFMessageComposeViewControllerDelegate { 

} 

希望它有帮助

Answer 2

所有你需要的是你的SWIFT文件的顶部添加

import MessageUI 

。此外，您最好添加发送消息前检查

if MFMessageComposeViewController.canSendText() 

，不要忘记要关闭的消息控制器的委托方法

func messageComposeViewController(controller: MFMessageComposeViewController, didFinishWithResult result: MessageComposeResult) { 
    dismissViewControllerAnimated(true, completion: nil) 
} 

Answer 3

您还需要委托实施

func messageComposeViewController(controller: MFMessageComposeViewController, didFinishWithResult result: MessageComposeResult) { 
     switch result.rawValue { 
     case MessageComposeResultCancelled.rawValue: 
      print("message cancelled") 

     case MessageComposeResultFailed.rawValue: 
      print("message failed") 

     case MessageComposeResultSent.rawValue: 
      print("message sent") 

     default: 
      break 
     } 

     controller.dismissViewControllerAnimated(true, completion: nil) 
    } 

认为这很有帮助！