Swift MKMapView Drop a Pin Annotation to Current Location - swift

Question

I am looking to be able to ask the app user for his/her current location and a pin to be automatically dropped on that location. Here is my code for grabbing the current location, but I am having trouble understanding how I can drop a pin for the current location.
import UIKit
import MapKit
import CoreLocation
class MapVC: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {
#IBOutlet weak var map: MKMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
// User's location
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
if #available(iOS 8.0, *) {
locationManager.requestAlwaysAuthorization()
} else {
// Fallback on earlier versions
}
locationManager.startUpdatingLocation()
// add gesture recognizer
let longPress = UILongPressGestureRecognizer(target: self, action: #selector(MapVC.mapLongPress(_:))) // colon needs to pass through info
longPress.minimumPressDuration = 1.5 // in seconds
//add gesture recognition
map.addGestureRecognizer(longPress)
}
// func called when gesture recognizer detects a long press
func mapLongPress(_ recognizer: UIGestureRecognizer) {
print("A long press has been detected.")
let touchedAt = recognizer.location(in: self.map) // adds the location on the view it was pressed
let touchedAtCoordinate : CLLocationCoordinate2D = map.convert(touchedAt, toCoordinateFrom: self.map) // will get coordinates
let newPin = MKPointAnnotation()
newPin.coordinate = touchedAtCoordinate
map.addAnnotation(newPin)
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations.last! as CLLocation
let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
//set region on the map
self.map.setRegion(region, animated: true)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 1

If you want to add pin to user location you can do that in didUpdateLocations delegate method like this
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
mapView.removeAnnotation(newPin)
let location = locations.last! as CLLocation
let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
//set region on the map
map.setRegion(region, animated: true)
newPin.coordinate = location.coordinate
map.addAnnotation(newPin)
}
Create a global variable for your pin
let newPin = MKPointAnnotation()
So whenever user will move to a new location the previous pin will be removed and a new pin will be added to updated location.

Answer 2

First you need to add annotation in didUpdateLocations method and then whenever any annotation is added then viewForAnnotation is called so here is the code and corresponding method to add pin in user current location :
//Adding Annotation on Current Location
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
//Get Current Location
let location = locations.last! as CLLocation
let userLocation:CLLocation = locations[0] as CLLocation
let myAnnotation: MKPointAnnotation = MKPointAnnotation()
myAnnotation.coordinate = CLLocationCoordinate2DMake(userLocation.coordinate.latitude, userLocation.coordinate.longitude)
myAnnotation.title = "Current location"
map.addAnnotation(myAnnotation)
}
//Adding image to user current location pin
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
guard !(annotation is MKUserLocation) else {
let annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "userLocation")
annotationView.image = UIImage(named:"anyimage.png")
return annotationView
}
return nil
}
Feel free to ask if any further issue.