func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) is not been called

I was trying to build an application in Xcode 6.3, which will detect the current location and pass the latitude and longitude to an API. I put a breakpoint in func locationManager and its not been called.

Here is the code:

import UIKit import CoreLocation

override func viewDidLoad() { super.viewDidLoad()

    self.locationManager.delegate = self
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
    self.locationManager.startUpdatingLocation()
    self.locationManager.startMonitoringSignificantLocationChanges()
    self.locationManager.requestWhenInUseAuthorization()

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) { var localValue:CLLocationCoordinate2D = manager.location.coordinate println("locations = (localValue.latitude) (localValue.longitude)") locationManager.stopUpdatingLocation() }