jeantimex

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Powerlevel9k

jeantimex

override func viewDidLoad() {
  super.viewDidLoad()
        
  // Auto resizing the height of the cell
  tableView.estimatedRowHeight = 44.0
  tableView.rowHeight = UITableViewAutomaticDimension
  
  ...
}

jeantimex

extension CollapsibleTableViewController: CollapsibleTableViewHeaderDelegate {
  func toggleSection(_ header: CollapsibleTableViewHeader, section: Int) {
    let collapsed = !sections[section].collapsed
        
    // Toggle collapse
    sections[section].collapsed = collapsed
    header.setCollapsed(collapsed)
    
    // Reload the whole section
    tableView.reloadSections(NSIndexSet(index: section) as IndexSet, with: .automatic)

jeantimex

override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
  return sections[(indexPath as NSIndexPath).section].collapsed ? 0 : UITableViewAutomaticDimension
}

jeantimex

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell? ?? UITableViewCell(style: .Default, reuseIdentifier: "cell")
    cell.textLabel?.text = sections[indexPath.section].items[indexPath.row]
    return cell
}

jeantimex

override func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let header = tableView.dequeueReusableHeaderFooterViewWithIdentifier("header") as? CollapsibleTableViewHeader ?? CollapsibleTableViewHeader(reuseIdentifier: "header")
    header.titleLabel.text = sections[section].name
    header.arrowLabel.text = ">"
    header.setCollapsed(sections[section].collapsed)
    header.section = section
    header.delegate = self
    return header
}

jeantimex

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return sections[section].collapsed ? 0 : sections[section].items.count
}

jeantimex

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

jeantimex

override init(reuseIdentifier: String?) {
    ...
    // arrowLabel must have fixed width and height
    arrowLabel.widthAnchor.constraintEqualToConstant(12).active = true
    arrowLabel.heightAnchor.constraintEqualToConstant(12).active = true
    titleLabel.translatesAutoresizingMaskIntoConstraints = false
    arrowLabel.translatesAutoresizingMaskIntoConstraints = false
}
override func layoutSubviews() {
    super.layoutSubviews()

jeantimex

protocol CollapsibleTableViewHeaderDelegate {
    func toggleSection(header: CollapsibleTableViewHeader, section: Int)
}
class CollapsibleTableViewHeader: UITableViewHeaderFooterView {
    var delegate: CollapsibleTableViewHeaderDelegate?
    var section: Int = 0
    ...
    override init(reuseIdentifier: String?) {
        super.init(reuseIdentifier: reuseIdentifier)
        ...