CLLocationManager requestWhenInUseAuthorization() not working

cllocationmanager, core-location, ios, swift

Solution

First you need to add `NSLocationWhenInUseUsageDescription` or `NSLocationAlwaysUsageDescription`(if you want to use in background) in your info.plist file. See the following image:

Next, in your swift file, you need to call either `locationManager.requestWhenInUseAuthorization()` or `locationManager.requestAlwaysAuthorization()` in your `viewDidLoad()` method.

Finally, you can do a `mapView.camera = GMSCameraPosition(target: locations.last!.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)` in your locationManager delegate method.

Sample code:

class ViewController: UIViewController, CLLocationManagerDelegate {

    var locationManager = CLLocationManager();

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        var camera = GMSCameraPosition.cameraWithLatitude(-33.86,
            longitude: 151.20, zoom: 6)
        var mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)
        mapView.myLocationEnabled = true
        self.view = mapView

        locationManager.delegate = self
        locationManager.distanceFilter = kCLDistanceFilterNone
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        if #available(iOS 8.0, *) {
            print("iOS >= 8.0.0")
            locationManager.requestAlwaysAuthorization()
        }
        locationManager.startUpdatingLocation()

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
        println(locations.last)

        var mapView = self.view as! GMSMapView

        mapView.camera = GMSCameraPosition(target: locations.last!.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)
    }
}

You can will this post, for more details about LocationManager change in iOS 8.

Problem

I am trying to use location services in my iOS app but for some reason `requestWhenInUseAuthorization` is not working. When the user first uses the app, the prompt comes up as normal asking for permissions but then when you open the app a second time, for some reason `didChangeAuthorizationStatus` method is not called so I cannot display the user current location on the map. My code is below: ``` override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib locationManager.delegate = self locationManager.requestWhenInUseAuthorization() var config:NSURLSessionConfiguration = NSURLSessionConfiguration.defaultSessionConfiguration() config.URLCache = NSURLCache(memoryCapacity: 2 * 1024 * 1024, diskCapacity: 10 * 1024 * 1024, diskPath: "MarkerData") markerSession = NSURLSession(configuration: config) } func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) { if status == .AuthorizedWhenInUse { locationManager.startUpdatingLocation() mapView.delegate = self mapView.myLocationEnabled = true mapView.settings.myLocationButton = true } } ```

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