Setting tableHeaderView height dynamically

Question

My application creates a UITableViewController that contains a custom tableHeaderView which may have an arbitrary height. I\'ve been struggling with a way to set this header

Answer 1

override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        if let headerView = self.tableView.tableHeaderView {
            let headerViewFrame = headerView.frame
            let height = headerView.systemLayoutSizeFitting(headerViewFrame.size, withHorizontalFittingPriority: UILayoutPriority.defaultHigh, verticalFittingPriority: UILayoutPriority.defaultLow).height
            var headerFrame = headerView.frame
            if height != headerFrame.size.height {
                headerFrame.size.height = height
                headerView.frame = headerFrame
                self.tableView.tableHeaderView = headerView
            }
        }
    }

Problem in calculating label size when using horizontal or vertical fitting