使用未声明的类型'MFMessageComposeViewControllerDelegate swift'

Question

我试图实现使用MFMessageComposeViewController对象发送文本消息。 但是，当我尝试声明MFMessageComposeViewControllerDelegate协议时。 在ViewController.swift中，我得到以下错误： 使用未声明的类型'MFMessageComposeViewControllerDelegate swift'

ViewController.swift：

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.
}
}

有人可以帮帮我吗？

Answer 1

添加MessageUI框架，

import UIKit
import MessageUI

class ViewController: UIViewController, MFMessageComposeViewControllerDelegate {

}

希望它有所帮助

Answer 2

您只需要添加

import MessageUI

在您的快速文件的顶部。 另外，您最好添加支票

if MFMessageComposeViewController.canSendText()

在发送消息之前，不要忘记在委托方法中关闭消息控制器

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

Answer 3

您还需要委托来实施

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)
    }

认为这是有帮助的！