uitableview - iOS 11 search bar jumping to top of screen

Question

I've got a UITableView in which I set its header to be a search bar.

tableView.tableHeaderView = searchController.searchBar

Everything works according to plan until you click it and it seemingly detaches from the tableView and jumps to the top of the screen. The tableView rows stay in place. Any reason it would do that in iOS 11 and not iOS 10?

Answer 1

It is encouraged to apply the new way to show search bar/search controller on iOS 11. Here is what I have done:

    if #available(iOS 11.0, *) {
        navigationItem.searchController = searchController
    } else {
        tableView.tableHeaderView = searchController.searchBar
    }