Update label of UITableViewHeaderFooterView on tapGesture

Question

I am working on Collapsable-Expandable Tableview cell where I have created separate class and xib for UITableViewHeaderFooterView and linked both to each Other. Xib view contains two labels one for Title and one for + or - to indicate section is collapsed or expanded. Now in my One of the view controller I have all the necessary methods of tableview written and below is the code for the same.

var sections = [
    Section(Title: "Sec 1", Indicator : "-" , expanded : true, moview : ["Simba1","TaleSpin1"]),
    Section(Title: "Sec 2", Indicator : "+" ,expanded : false, moview : ["Simba2","TaleSpin2"]),
    Section(Title: "Sec 3", Indicator : "+" ,expanded : false, moview : ["Simba3","TaleSpin3"]),
    Section(Title: "Sec 4", Indicator : "+" ,expanded : false, moview : ["Simba4","TaleSpin4"])
]

var selectIndexPath: IndexPath!

override func viewDidLoad() {
    super.viewDidLoad();

    selectIndexPath = IndexPath(row: -1, section: -1)

    tableView.register(UINib(nibName: "HeaderView", bundle: nil), forHeaderFooterViewReuseIdentifier: "HeaderView");
}

override func numberOfSections(in tableView: UITableView) -> Int {
    return sections.count
}

override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return sections[section].movie.count
}

override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    return 44
}

override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    if sections[indexPath.section].expanded {
        return 44
    } else {
        return 0
    }
}

override func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
    return 2
}


override func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    //let headerView = tableView.dequeueReusableHeaderFooterView(withIdentifier: "ExpandableHeader") as! ExpandableHeaderView;
    let headerView = tableView.dequeueReusableHeaderFooterView(withIdentifier: "HeaderView") as! HeaderView
    headerView.customInit(title: sections[section].Title , indicator: sections[section].Indicator , section: section, delegate: self)


    return headerView
}

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "labelCell")!;
    cell.textLabel?.text = sections[indexPath.section].movie[indexPath.row];

    return cell
}

func toggleSection(header: HeaderView, section: Int) {
    print("expanded: \(!sections[section].expanded)");
    sections[section].expanded = !sections[section].expanded
    sections[section].Indicator = "+"

    tableView.beginUpdates()
    for i in 0 ..< sections[section].movie.count {
        tableView.reloadRows(at: [IndexPath(row: i, section: section)], with: .automatic)
    }
    tableView.endUpdates()
}

I want to change the label + or - based on whether section is collapsed or expanded on user tap. I tried adding sections[section].Indicator = "+" this line in toggleSection function but of no use.

Any help will be appreciated.