How to set Search Bar's text on Navigation Bar Title Text? - ios

Question

I am getting idea of a new app. I love to find a many tricks. however, No luck for me.
The simple.
You can see swipe down the search bar from the below of the navigation bar.
Result:
// iOS 13 Navigation Bar only
self.navigationItem.title = "Search Title"
self.navigationController?.navigationBar.prefersLargeTitles = true
self.navigationController?.navigationItem.largeTitleDisplayMode = .never
UINavigationBar.appearance().isTranslucent = false
let app = UINavigationBarAppearance()
let navigationBar = self.navigationController?.navigationBar
app.backgroundColor = .clear
app.configureWithOpaqueBackground()
app.titleTextAttributes = [.foregroundColor: UIColor.label]
app.largeTitleTextAttributes = [.foregroundColor: UIColor.label]
app.backgroundColor = .systemGroupedBackground
self.navigationController?.navigationBar.scrollEdgeAppearance = app
navigationBar!.standardAppearance = app
navigationBar!.scrollEdgeAppearance = app
Search Result:
// Search Bars
let search = UISearchController(searchResultsController: nil)
search.searchBar.delegate = self
search.searchResultsUpdater = self as? UISearchResultsUpdating
search.searchBar.placeholder = "Search"
search.searchBar.searchTextField.tintColor = UIColor.gray
search.searchBar.setImage(UIImage(named: "magnifyingglass")?.withTintColor(UIColor.systemGray), for: .search, state: .normal)
self.navigationItem.searchController = search
(UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]) ).defaultTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.init(white: 100, alpha: 0.50)]
let textField = search.searchBar.value(forKey: "searchField") as! UITextField
let glassIconView = textField.leftView as! UIImageView
glassIconView.image = glassIconView.image?.withRenderingMode(.alwaysTemplate)
glassIconView.tintColor = UIColor.systemGray
let clearButton = textField.value(forKey: "clearButton") as! UIButton
clearButton.setImage(clearButton.imageView?.image?.withRenderingMode(.alwaysTemplate), for: .normal)
clearButton.tintColor = UIColor.systemGray
Now, I am tried to look for the trick code to set the search bar's text will appear navigation bar when you have searched it. (Yes, It is a very familiar to Safari style).
I don't like Search Bar title text stayed on the small of the search bars, so move to a large title look better.
Let me know. :)

Answer 1

You can use searchBarSearchButtonClicked method of UISearchBarDelegate.
(https://developer.apple.com/documentation/uikit/uisearchbardelegate/1624294-searchbarsearchbuttonclicked)
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
self.navigationItem.title = searchBar.text ?? "Search Title"
}
If you need to update the title as the user types in search bar, use updateSearchResults of UISearchResultsUpdating. (https://developer.apple.com/documentation/uikit/uisearchresultsupdating/1618658-updatesearchresults)
func updateSearchResults(for searchController: UISearchController) {
self.navigationItem.title = searchController.searchBar.text ?? "Search Title"
}