如何获取tableview单元格中每行字符串文本的高度？

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! CustomTableViewCell
    
    let text = dataSource[indexPath.row] // 获取每行字符串文本的内容
    
    let width = cell.textLabel?.frame.width ?? tableView.frame.width // 字符串的宽度为单元格的宽度
    let font = UIFont.systemFont(ofSize: 17) // 字符串的字体
    
    let options: NSStringDrawingOptions = [.usesLineFragmentOrigin, .usesFontLeading]
    let attributes: [NSAttributedString.Key: Any] = [NSAttributedString.Key.font: font]
    
    let rect = text.boundingRect(with: CGSize(width: width, height: CGFloat.greatestFiniteMagnitude),
                                 options: options,
                                 attributes: attributes,
                                 context: nil)
    
    let height = ceil(rect.height) // 向上取整，得到字符串的高度
    
    // 设置单元格的高度
    cell.textLabel?.frame.size.height = height
    
    return cell
}