iphone如何让uitableviewcellaccessorydisclosureindicator背景透明？

override func layoutSubviews() {
    super.layoutSubviews()
    
    // 设置accessoryDisclosureIndicator的背景为透明
    for view in subviews {
        if let disclosureView = view as? UIButton {
            disclosureView.backgroundColor = UIColor.clear
            break
        }
    }
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomTableViewCell
    
    // 配置cell的其他内容
    
    return cell
}