whenever cell leaves the view, it becomes isHidden = True how do I have it where the animation actually changes the isHidden to false and it stays that way?

points.swift

  public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return(finalPoints.count)
  }
  
  public func tableView(_ tableView: UITableView, cellForRowAt indexPath:  IndexPath) -> UITableViewCell {
    let card = finalPoints[indexPath.row]
    tableView.separatorStyle = .none
    tableView.allowsSelection = false
    tableView.bounces = false
    
    tableView.backgroundColor = UIColor(red:0.22, green:0.04, blue:0.27, alpha:1.0)
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
    cell.backgroundColor = UIColor(red:0.22, green:0.04, blue:0.27, alpha:1.0)
    cell.textLabel?.textColor = card.color
    cell.textLabel?.textAlignment = .center
    cell.textLabel?.font = UIFont(name: "Helvetica", size: 28)
    cell.textLabel?.text = card.name
    cell.isHidden = true

    
    queue.addOperation {
      print("hey \(indexPath.row)  \(Date())")
      usleep(500000)
      DispatchQueue.main.async {
        UIView.animate(withDuration: 1.0, animations: {
          cell.isHidden = false
        })
      }
    }
    return(cell)
  }