tableview editing action

tableViewAction.swift

override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
        
        let delete = UITableViewRowAction(style: .destructive, title: "Delete") { (action, indexPath) in
            // delete item at indexPath
            self.todo.remove(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with: .fade)
        }
        
        let share = UITableViewRowAction(style: .default, title: "Share") { (action, indexPath) in
            // share item at indexPath
            let shareOption = UIAlertController(title: nil, message: "choose sharing option", preferredStyle: .actionSheet)
            let shareOnFacebook = UIAlertAction(title: "Facebook", style: .default, handler: {
                (alert: UIAlertAction!) -> Void in
                print("File Deleted")
            })
            let shareOnTwitter = UIAlertAction(title: "Twitter", style: .default, handler: {
                (alert: UIAlertAction!) -> Void in
                print("File Saved")
            })
            shareOption.addAction(shareOnFacebook)
            shareOption.addAction(shareOnTwitter)
            self.present(shareOption, animated: true, completion: nil)

        }
        
        
        share.backgroundColor = UIColor.lightGray
        
        return [delete, share]
        
    }