Sending an animated Gif via sms in Swift

I'm trying to send an animated gif via the MFMessageComposeViewController in swift,

It seems to be working fine when I send the gif, however the preview shows a non-moving image. Any thoughts on how to make the preview animated?

let messageComposeVC = MFMessageComposeViewController()      let imgData = NSData(contentsOfURL: NSURL(string: "http://dramallamaapp.com/wp-content/uploads/2016/08/output_9GECbQ.gif")!)if imgData != nil {    messageComposeVC.addAttachmentData(imgData!, typeIdentifier: "com.compuserve.gif", filename: "animated.gif")}messageComposeVC.messageComposeDelegate = selfpresentViewController(messageComposeVC, animated: true, completion: nil)