UITableView中的MFMessageComposeViewController(Swift)

我试图在自定义TableViewCell类中显示MFMessageComposeViewController,但我收到一个错误消息:“UITableViewCell和UIViewController类的多重继承”。我知道MFMessageComposeViewController需要UIViewController,所以我该如何解决这个问题?

我的代码:

class TableViewCell: UITableViewCell, MFMessageComposeViewControllerDelegate {

  var userNumber: String!

 @IBAction func callButton(sender: AnyObject) {

    UIApplication.sharedApplication().openURL(NSURL(string: "telprompt://\(userNumber)")!)

}

@IBAction func textButton(sender: AnyObject) {

    let message = MFMessageComposeViewController()
    message.body = ""
    message.recipients = ["\(userNumber)"]
    message.messageComposeDelegate = self


}

func messageComposeViewController(controller: MFMessageComposeViewController!, didFinishWithResult result: MessageComposeResult) {


}