Search Controller Not Displaying Search Results - ios

Question

I'm creating a map app that autocompletes searches in the search bar. However, the autocomplete results are not displaying.
Here is my code on the ViewController with the mapView:
import UIKit
import MapKit
import CoreLocation
class BarMapVC: UIViewController {
#IBOutlet weak var doneBtn: UIBarButtonItem!
#IBOutlet weak var locationBtn: UIButton!
#IBOutlet weak var barMapView: MKMapView!
var locationManager = CLLocationManager()
let authorizationStatus = CLLocationManager.authorizationStatus()
let regionRadius: Double = 1000
var resultSearchController:UISearchController? = nil
override func viewDidLoad() {
super.viewDidLoad()
barMapView.showsUserLocation = true
barMapView.delegate = self
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
configureLocationServices()
centerMapOnUserLocation()
let locationSearchTable =
storyboard!.instantiateViewController(withIdentifier:
"LocationSearchTable") as! LocationSearchTable
resultSearchController = UISearchController(searchResultsController:
locationSearchTable)
resultSearchController?.searchResultsUpdater = locationSearchTable
let searchBar = resultSearchController!.searchBar
searchBar.sizeToFit()
searchBar.placeholder = "Search for places"
navigationItem.titleView = resultSearchController?.searchBar
resultSearchController?.hidesNavigationBarDuringPresentation = false
resultSearchController?.dimsBackgroundDuringPresentation = true
definesPresentationContext = true
locationSearchTable.mapView = barMapView
}
#IBAction func locationBtnWasPressed(_ sender: Any) {
if authorizationStatus == .authorizedAlways || authorizationStatus
== .authorizedWhenInUse {
centerMapOnUserLocation()
}
}
}
extension BarMapVC: MKMapViewDelegate {
func centerMapOnUserLocation() {
guard let coordinate = locationManager.location?.coordinate else {
return }
let coordinateRegion =
MKCoordinateRegionMakeWithDistance(coordinate, regionRadius * 2.0,
regionRadius * 2.0)
barMapView.setRegion(coordinateRegion, animated: true)
}
}
extension BarMapVC: CLLocationManagerDelegate {
func configureLocationServices() {
if authorizationStatus == .notDetermined {
locationManager.requestAlwaysAuthorization()
} else {
return
}
}
func locationManager(_ manager: CLLocationManager,
didChangeAuthorization status: CLAuthorizationStatus) {
centerMapOnUserLocation()
}
}
And here is my code from the UITableViewController file that displays the autocompleted search results:
import UIKit
import MapKit
class LocationSearchTable : UITableViewController {
var matchingItems:[MKMapItem] = []
var mapView: MKMapView? = nil
func parseAddress(selectedItem:MKPlacemark) -> String {
// put a space between "4" and "Melrose Place"
let firstSpace = (selectedItem.subThoroughfare != nil &&
selectedItem.thoroughfare != nil) ? " " : ""
// put a comma between street and city/state
let comma = (selectedItem.subThoroughfare != nil ||
selectedItem.thoroughfare != nil) && (selectedItem.subAdministrativeArea
!= nil || selectedItem.administrativeArea != nil) ? ", " : ""
// put a space between "Washington" and "DC"
let secondSpace = (selectedItem.subAdministrativeArea != nil &&
selectedItem.administrativeArea != nil) ? " " : ""
let addressLine = String(
format:"%#%#%#%#%#%#%#",
// street number
selectedItem.subThoroughfare ?? "",
firstSpace,
// street name
selectedItem.thoroughfare ?? "",
comma,
// city
selectedItem.locality ?? "",
secondSpace,
// state
selectedItem.administrativeArea ?? ""
)
return addressLine
}
}
extension LocationSearchTable : UISearchResultsUpdating {
func updateSearchResults(for searchController: UISearchController) {
}
func updateSearchResultsForSearchController(searchController:
UISearchController) {
guard let mapView = mapView,
let searchBarText = searchController.searchBar.text else {
return }
let request = MKLocalSearchRequest()
request.naturalLanguageQuery = searchBarText
request.region = mapView.region
let search = MKLocalSearch(request: request)
search.start { response, _ in
guard let response = response else {
return
}
self.matchingItems = response.mapItems
self.tableView.reloadData()
}
}
}
extension LocationSearchTable {
override func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
return matchingItems.count
}
override func tableView(_ tableView: UITableView, cellForRowAt
indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell")!
let selectedItem = matchingItems[indexPath.row].placemark
cell.textLabel?.text = selectedItem.name
cell.detailTextLabel?.text = parseAddress(selectedItem:
selectedItem)
return cell
}
}
Is there somewhere I entered an incorrect variable or did something wrong? I've been stuck on this error for two days. Please help thanks!