Add UITextField to title view of navigation item

Question

How do you add a text field to the title view of a navigation item and have it sized correctly?

It works fine if I do this with a search bar like this but I don\'t know

Answer 1

Class: ViewController: UISearchBarDelegate {

let searchController = UISearchController(searchResultsController: nil)
navigationItem.searchController = searchController
navigationItem.searchController?.searchBar.delegate = self
navigationItem.searchController?.obscuresBackgroundDuringPresentation = false
navigationItem.searchController?.hidesNavigationBarDuringPresentation = false
navigationItem.searchController?.searchBar.placeholder = "Enter text here..."