How to remove UITableView section header separator

Question

I would like to remove (or make them clearColor) UITableView's section header separators. Setting tableView.separatorStyle = .none doesn't work. I've also tried solutions from here, but none of them actually worked for me (maybe because the answers are pretty old). I still get this tiny separator below the section header.

I created the UITableView in Storyboard and add a UITableViewCell there. Then I set it as a header like this:

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        let cell = tableView.dequeueReusableCell(withIdentifier: "headerTableViewCell")
        return cell
    }

func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        if section == 1 {
            return 49
        }
        return 0
    }

Answer 1

Don't know why you are returning UITableViewCell in viewForHeaderInSection method so may be it is possible that is showing separator of that UITableViewCell. Try returning the contentView of cell instead of cell from viewForHeaderInSection method.

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let cell = tableView.dequeueReusableCell(withIdentifier: "headerTableViewCell")
    return cell.contentView
}

Answer 2

Try this:

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let headerView = UIView()
    headerView.backgroundColor = UIColor.clear
    return headerView
}