Google Maps not showing current location or locate button

Question

I have my google maps view embedded in a TabBar Controller and it is the second item in the tab. The view loads the map but it doesn't display the current location or the locate button. I have already edited the scheme to include a location for the build to use.

    var locationManager = CLLocationManager()
    var didFindMyLocation = false

    override func viewDidLoad() {
        super.viewDidLoad()

        var camera = GMSCameraPosition.cameraWithLatitude(33.7,
            longitude: -77.4, zoom: 8.0)
        mapView.camera = camera

        locationManager.delegate = self
        locationManager.requestWhenInUseAuthorization()
        mapView.addObserver(self, forKeyPath: "myLocation", options: NSKeyValueObservingOptions.New, context: nil)

        // Do any additional setup after loading the view.
    }

    func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        if status == CLAuthorizationStatus.AuthorizedWhenInUse {
            mapView.myLocationEnabled = true
        }
    }

    override func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) {
        if !didFindMyLocation {
            let myLocation: CLLocation = change[NSKeyValueChangeNewKey] as! CLLocation
            mapView.camera = GMSCameraPosition.cameraWithTarget(myLocation.coordinate, zoom: 10.0)
            mapView.settings.myLocationButton = true

            didFindMyLocation = true
        }
    }

Answer 1

If location permission was previously set func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) probably isn't being called because the authorization status is not changing.

You can also just manually perform a check for authorization and then enable the location on the map

if CLLocationManager.locationServicesEnabled()
                && CLLocationManager.authorizationStatus() == CLAuthorizationStatus.AuthorizedWhenInUse {
   mapView.myLocationEnabled = true
}

Checking authorization status documentation