Adding search bar and location button to MapKit view controller - ios

Question

This may be an easy solution but I've tried everything it seems. I cannot seem to add a search box and button to my MapKit view controller after my login window. I added my MapKit programatically rather than from the story board and can't seem to add any overlays onto it. Here is the code where I've previously tried to add UIButton and UITextField but it doesn't seem to appear so I've removed it.
I'm trying to get the user to input an address to where they'll get walking directions from their current location with a route poly overlay and also a button for finding their current location, like in the bottom corner of the normal Maps app.
import MapKit
import CoreLocation
class mapViewController: UIViewController, CLLocationManagerDelegate {
let mapView = MKMapView()
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
setupMapView()
checkLocationServices()
}
func setupMapView() {
view.addSubview(mapView)
mapView.translatesAutoresizingMaskIntoConstraints = false
mapView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
mapView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
mapView.rightAnchor.constraint(equalTo: view.safeAreaLayoutGuide.rightAnchor).isActive = true
mapView.leftAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leftAnchor).isActive = true
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
guard let location = locations.last else { return }
let region = MKCoordinateRegion.init(center: location.coordinate, latitudinalMeters: 4000, longitudinalMeters: 4000)
mapView.setRegion(region, animated: true)
}
func checkLocationAuthorization() {
switch CLLocationManager.authorizationStatus() {
case .authorizedWhenInUse:
mapView.showsUserLocation = true
followUserLocation()
locationManager.startUpdatingLocation()
break
case .denied:
// Show alert
break
case .notDetermined:
locationManager.requestWhenInUseAuthorization()
case .restricted:
// Show alert
break
case .authorizedAlways:
break
}
}
func checkLocationServices() {
if CLLocationManager.locationServicesEnabled() {
setupLocationManager()
checkLocationAuthorization()
} else {
// the user didn't turn it on
}
}
func followUserLocation() {
if let location = locationManager.location?.coordinate {
let region = MKCoordinateRegion.init(center: location, latitudinalMeters: 4000, longitudinalMeters: 4000)
mapView.setRegion(region, animated: true)
}
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
checkLocationAuthorization()
}
func setupLocationManager() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
}
}
EDIT: I have managed to add a UISearchController:
let searchController: UISearchController = {
let sc = UISearchController()
sc.obscuresBackgroundDuringPresentation = false
sc.searchBar.placeholder = NSLocalizedString("Search Directions", comment: "")
sc.searchBar.barTintColor = .systemPink
return sc
}()