MapView in a VC and its Searchbar in another - swift3

Question

As per the title, in general I'd like to show, in one VC, a MapView and in a second VC a SearchBar (using another TableVC to display, as the user types, "GeoElements" obtained by MKLocalSearchRequest). This because I want to display in the Map some AnnotationViews with custom Callouts. My problem is that the TableVC doesn't update with placemarks as the user types in the SearchBar..
MAPVIEW code:
import UIKit
import MapKit
protocol HandleMapSearch {
func dropPinZoomIn(placemark:MKPlacemark)
}
class ViewController: UIViewController {
#IBOutlet weak var mapView: MKMapView!
let locationManager = CLLocationManager()
var selectedPin:MKPlacemark? = nil
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers
locationManager.requestWhenInUseAuthorization()
locationManager.requestLocation()
}
func getDirections(){
if let selectedPin = selectedPin {
let mapItem = MKMapItem(placemark: selectedPin)
let launchOptions = [MKLaunchOptionsDirectionsModeKey : MKLaunchOptionsDirectionsModeDriving]
mapItem.openInMaps(launchOptions: launchOptions)
}
}
}
extension ViewController : CLLocationManagerDelegate {
private func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status == .authorizedWhenInUse {
locationManager.requestLocation()
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.first {
let span = MKCoordinateSpanMake(0.05, 0.05)
let region = MKCoordinateRegion(center: location.coordinate, span: span)
mapView.setRegion(region, animated: true)
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print("error:: (error)")
}
}
extension ViewController: HandleMapSearch {
func dropPinZoomIn(placemark:MKPlacemark){
// cache the pin
selectedPin = placemark
let annotation = MKPointAnnotation()
annotation.coordinate = placemark.coordinate
annotation.title = placemark.name
if let city = placemark.locality,
let state = placemark.administrativeArea {
annotation.subtitle = "(city) (state)"
}
mapView.addAnnotation(annotation)
let span = MKCoordinateSpanMake(0.05, 0.05)
let region = MKCoordinateRegionMake(placemark.coordinate, span)
mapView.setRegion(region, animated: true)
}
}
extension ViewController : MKMapViewDelegate {
func mapView(_: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView?{
if annotation is MKUserLocation {
//return nil so map view draws "blue dot" for standard user location
return nil
}
let reuseId = "pin"
var pinView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId) as? MKPinAnnotationView
pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
pinView?.pinTintColor = UIColor.orange
pinView?.canShowCallout = true
let smallSquare = CGSize(width: 30, height: 30)
let button = UIButton(frame: CGRect(origin: CGPoint(x: 0,y :0), size: smallSquare))
button.setBackgroundImage(UIImage(named: "car"), for: .normal)
button.addTarget(self, action: Selector(("getDirections")), for: .touchUpInside)
pinView?.leftCalloutAccessoryView = button
return pinView
}
}
EVENT code:
import UIKit
import MapKit
class EventVC: UIViewController {
var resultSearchController:UISearchController? = nil
override func viewDidLoad() {
super.viewDidLoad()
let locationSearchTable = storyboard!.instantiateViewController(withIdentifier: "LocationSearchTable") as! LocationSearchTable
resultSearchController = UISearchController(searchResultsController: locationSearchTable)
resultSearchController?.searchResultsUpdater = locationSearchTable
let searchBar = resultSearchController!.searchBar
searchBar.sizeToFit()
searchBar.placeholder = "Insert Address"
navigationItem.titleView = resultSearchController?.searchBar
resultSearchController?.hidesNavigationBarDuringPresentation = false
resultSearchController?.dimsBackgroundDuringPresentation = true
definesPresentationContext = true
//these two below are problematic
locationSearchTable.mapView = mapView
locationSearchTable.handleMapSearchDelegate = self
}
}
LOCATIONSEARCHTABLE code:
import UIKit
import MapKit
class LocationSearchTable: UITableViewController {
var matchingItems:[MKMapItem] = []
var mapView: MKMapView? = nil
var handleMapSearchDelegate:HandleMapSearch? = nil
override func viewDidLoad() {
super.viewDidLoad()
}
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){
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
}
}