How to make the annotation appear on the Apple map via Swift? - ios

Question

So basically, I'm calling a Rest API to get all Bus Stops location, then put annotation of all bus stops within 5km from my current location on the map when a button is called. However, it is just not displaying, I can't seem to figure out the problem.
import UIKit
import MapKit
class MapKitViewController: UIViewController, CLLocationManagerDelegate {
#IBOutlet weak var GPSButton: UIButton!
var stopSearchResults: [Value] = []
var Annotations: [BusStopAnnotation] = []
let queryServices = QueryService()
let locationManager:CLLocationManager = CLLocationManager()
#IBOutlet weak var mapView: MKMapView!
var currentLocation: CLLocationCoordinate2D?
var counter: Int = 0
override func viewDidLoad() {
super.viewDidLoad()
UIApplication.shared.isNetworkActivityIndicatorVisible = true
queryServices.GetAllBusStops(){
result in
UIApplication.shared.isNetworkActivityIndicatorVisible = false
if let result = result {
self.stopSearchResults = result.value
}
}
configureLocationService()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
private func configureLocationService() {
locationManager.delegate = self
let status = CLLocationManager.authorizationStatus()
if status == .notDetermined {
locationManager.requestAlwaysAuthorization()
} else if status == .authorizedAlways || status == .authorizedWhenInUse {
beginLocationUpdate(locationManager: locationManager)
}
}
private func beginLocationUpdate(locationManager: CLLocationManager) {
mapView.showsUserLocation = true
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
private func zoomToLatestLocation(with coordinate: CLLocationCoordinate2D) {
let zoomRegion = MKCoordinateRegion(center: coordinate, latitudinalMeters: 1000, longitudinalMeters: 1000)
mapView.setRegion(zoomRegion, animated: true)
}
#IBAction func GPSTrack(_ sender: Any) {
InputAllAnnotation(busStops: stopSearchResults)
print("Searching for nearby bus stops")
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("Did get latest location")
guard let latestLocation = locations.first else { return }
if currentLocation == nil {
zoomToLatestLocation(with: latestLocation.coordinate)
}
currentLocation = latestLocation.coordinate
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
print("The status changed")
if status == .authorizedAlways || status == .authorizedWhenInUse {
beginLocationUpdate(locationManager: manager)
}
}
func InputAllAnnotation(busStops: [Value]) {
for busStop in busStops{
let busStopObj = BusStopAnnotation(value: busStop)
Annotations.append(busStopObj)
let distance = busStop.GetDistance(latitude: Double(currentLocation?.latitude ?? 0), longitude: Double(currentLocation?.longitude ?? 0))
if distance < 5000 {
mapView.addAnnotation(busStopObj)
}
}
}
}
extension MapKitViewController: MKMapViewDelegate {
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
if let busStopAnnotation = mapView.dequeueReusableAnnotationView(withIdentifier: MKMapViewDefaultAnnotationViewReuseIdentifier) as?
MKMarkerAnnotationView {
busStopAnnotation.animatesWhenAdded = true
busStopAnnotation.titleVisibility = .adaptive
busStopAnnotation.canShowCallout = true
return busStopAnnotation
}
return nil
}
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
print("The annotation was selected: \(String(describing: view.annotation?.title))")
}
}
final class BusStopAnnotation: NSObject, MKAnnotation {
var coordinate: CLLocationCoordinate2D
var title: String?
var subtitle: String?
var busStopCode: String?
init(value : Value) {
self.coordinate = value.GetLocationCoordinate2D()
self.title = value.roadName
self.subtitle = value.description
self.busStopCode = value.busStopCode
}
init(coordinate: CLLocationCoordinate2D, roadName: String?, description: String?, busStopCode: String?) {
self.coordinate = coordinate
self.title = roadName
self.subtitle = description
self.busStopCode = busStopCode
}
var region: MKCoordinateRegion {
let span = MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05)
return MKCoordinateRegion(center: coordinate, span: span)
}
}

Answer 1

You may need
self.mapView.delegate = self

Answer 2

import:
import UIKit
import MapKit
set class
class MapViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {
outlet your map
#IBOutlet weak var map: MKMapView!
Code:
let customPin : CLLocationCoordinate2D = CLLocationCoordinate2DMake(Latitude, Longitude)
let objectAnnotation = MKPointAnnotation()
objectAnnotation.coordinate = customPin
objectAnnotation.title = "Here's your custom PIN"
self.map.addAnnotation(objectAnnotation)
extra:
to set the camera near the PIN
let theSpan:MKCoordinateSpan = MKCoordinateSpan(latitudeDelta: 0.009, longitudeDelta: 0.009)
let pointLocation:CLLocationCoordinate2D = CLLocationCoordinate2DMake(Latitude, Longitude)
let region:MKCoordinateRegion = MKCoordinateRegion(center: pointLocation, span: theSpan)
self.map.setRegion(region, animated: true)
move values depending how close/far you want the camera
let theSpan:MKCoordinateSpan = MKCoordinateSpan(latitudeDelta: HERE, longitudeDelta: HERE)