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

If you're still having problems with layout with the above code sample, there's a slight chance you disabled translatesAutoresizingMaskIntoConstraints on the custom header view. In that case, you need to set translatesAutoresizingMaskIntoConstraints back to true after you set the header's frame.

Here's the code sample I'm using, and working correctly on iOS 11.

public override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    guard let headerView = tableView.tableHeaderView else { return }

    let height = headerView.systemLayoutSizeFitting(UILayoutFittingCompressedSize).height
    var headerFrame = headerView.frame

    if height != headerFrame.size.height {
        headerFrame.size.height = height
        headerView.frame = headerFrame
        tableView.tableHeaderView = headerView

        if #available(iOS 9.0, *) {
            tableView.layoutIfNeeded()
        }
    }

    headerView.translatesAutoresizingMaskIntoConstraints = true
}