@IBOutlet weak var comment: UITextField!
@IBOutlet weak var imageToPost: UIImageView!

@IBAction func postImage(_ sender: Any) {
     if let image = imageToPost.image {

     // Create the class object for the Post
     let post = PFObject(className: "Post")
     post["Message"] = comment.text
     post["userId"] = PFUser.current()?.objectId

        // Create the image data
        if let imageData = image.pngData() {
            let imageFile = PFFileObject(name: "image.png", data: imageData)
            post["imageFile"] = imageFile
            post.saveInBackground { (success, error) in
                if let error = error {
                    print("There were issues saving the file: (error.localizedDescription)")
                    self.displayAlert(title: "Error", message: "Image could not be posted, please try again later")
                } else {
                    // SAving successful
                    print("File saved correctly")
                    self.displayAlert(title: "Image Posted", message: "Your image hase posted successfully")
                    self.comment.text = ""
                    self.imageToPost.image = nil
                }
            }
        }

    }

}