Как использовать tableHeaderView вместе с auto-layout? | https://t.me/BlogSwift

UITableViewExtensions.swift

// СВИФТЕР | Блог про Swift | t.me/BlogSwift

extension UITableView {
    
    func setTableHeaderView(headerView: UIView) {
        tableHeaderView = headerView
        
      	headerView.translatesAutoresizingMaskIntoConstraints = false
        headerView.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
        headerView.centerXAnchor.constraint(equalTo: self.centerXAnchor).isActive = true
        headerView.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
    }
    
    func updateTableHeaderViewIfNeeded() {
        guard let headerView = tableHeaderView else { return }
        
        let oldSize = headerView.bounds.size
        headerView.layoutIfNeeded()
        let newSize = headerView.bounds.size
        
        guard oldSize != newSize else { return }
        beginUpdates()
        endUpdates()
    }
}

// Внутри ViewController

override func viewDidLoad() {
    super.viewDidLoad()
    tableView.setTableHeaderView(headerView: someHeaderView)
}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    tableView.updateTableHeaderViewIfNeeded()
}