iOS 11 customise search bar in navigation bar

Question

I want to change the color of the text and icon in the iOS 11 searchbar when it is embedded in the navigation bar. So placeholder text, search text and search icon.

Answer 1

Put

UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes = [NSForegroundColorAttributeName: UIColor.white]

and

UISearchBar.appearance().tintColor = UIColor.white in the AppDelegate.

Alternatively, put them both in [UIViewController viewDidLoad:]