如何在UITableViewCell中绘制一条线

class LineTableViewCell: UITableViewCell {
    var lineView: UIView!

    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        
        lineView = UIView()
        lineView.backgroundColor = UIColor.lightGray
        contentView.addSubview(lineView)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        lineView.frame = CGRect(x: 0, y: contentView.bounds.height - 1, width: contentView.bounds.width, height: 1)
    }
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "LineTableViewCell", for: indexPath) as! LineTableViewCell
    
    // 设置其他内容
    
    // 根据需要显示或隐藏线条
    if indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
        cell.lineView.isHidden = true
    } else {
        cell.lineView.isHidden = false
    }
    
    return cell
}