ios - UITableView deleterows scroll to top

Question

I made a query to delete specified rows in UITableView but the problem when the deleteRows is called the UITableView scroll to top so how to prevent it scrolling to top? and why it scroll to top!

I try called a method to force it scroll to down but the tableview scroll to top first after return the code of remove

FIRDatabase.database().reference().child("messages").child(self.roomId).observe(.childRemoved, with: {(snap) in
        print("child Removed")
        for msg in self.messageArray {
            let message: NSDictionary = msg as! NSDictionary
            let messageContent: [String: Any] = message as! [String: Any]
            if messageContent["messageID"] as! String == snap.key {
                let indexRemoved = self.messageArray.index(of: msg)
                self.messageArray.remove(msg)
                self.userArray.removeObject(at: indexRemoved)
                let indexPath = IndexPath(row: indexRemoved, section: 0)
                print(indexPath)
                self.conversationTableView.deleteRows(at: [indexPath], with: UITableViewRowAnimation.none)
                break;
            }   
        }
        })

Answer 1

Waitting for answers