Swift + Show Current Location and Update Location in a MKMapView

First of all add & Import CoreLocation and MapKit framework in your class.

If you are working with iOS 8 you must include the NSLocationAlwaysUsageDescription key in info.plist file of your current project to get the location services to work.

import UIKit

import CoreLocation

import MapKit

class ViewController: UIViewController, CLLocationManagerDelegate

{

    @IBOutlet weak var map: MKMapView!

    

    let locationManager = CLLocationManager()

    

    override func viewDidLoad()

    {

        super.viewDidLoad()

        

       self.map.mapType = MKMapType.Standard

       self.map.showsUserLocation = true

        

       self.map.removeAnnotations(self.map.annotations)

        locationManager.delegate = self

        locationManager.desiredAccuracy = kCLLocationAccuracyBest

        locationManager.requestAlwaysAuthorization()

        locationManager.startUpdatingLocation()

        

        

        let location = self.locationManager.location

        

        var latitude: Double = location.coordinate.latitude

        var longitude: Double = location.coordinate.longitude

        

        println("current latitude :: \(latitude)")

        println("current longitude :: \(longitude)")

    }

    override func didReceiveMemoryWarning()

    {

        super.didReceiveMemoryWarning()

       

    }

   You have to override CLLocationManager.didUpdateLocations (part of CLLocationManagerDelegate) to get notified when the location manager retrieves the current location:

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!)

    {

        //-

        

        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))

        

        

        self.map.setRegion(region, animated: true)

        

    

        // Add an annotation on Map View

        var point: MKPointAnnotation! = MKPointAnnotation()

        

        point.coordinate = location.coordinate

        point.title = "Current Location"

        point.subtitle = "sub title"

        

        self.map.addAnnotation(point)

        

        //stop updating location to save battery life

        locationManager.stopUpdatingLocation()

    }

//--- Uncomment to add custom annotation view ---//

    /*

    //--- use this code to add custom image (Annotation) for pin point ---//

    func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! 

{

        if !(annotation is MKPointAnnotation)

        {

            return nil

        }

        

        let reuseId = "test"

        

        var anView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId)

        

        if anView == nil

        {

            anView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)

            anView.image = UIImage(named:"1.png")

            anView.canShowCallout = true

        }

        else

        {

            anView.annotation = annotation

        }

        

        return anView

    }

    */

}