Stormy with CoreLocation correct values show only after hitting refresh Button.

Question

Hi,

I am currently updating the Stormy App to work with GPS. Therefore I added the CoreLocation Framework and created a new Controller. And so far it works - I get the Long, Lat and Location from the user BUT it only updates the Labels when I hit the refresh button.

Here is my ViewController(only the important code):

var coreLocation: CoreLocationController = CoreLocationController()

override func viewDidLoad() {
        super.viewDidLoad()
}

func retrieveWeatherForecast() {
        let forecastService = ForecastService(APIKey: forecastAPIKey)
        let userLatitude = coreLocation.userLatitude
        let userLongitude = coreLocation.userLongitude
        let userLocation = coreLocation.userLocation
        forecastService.getForecast(userLatitude, long: userLongitude) {
            (let currently) in
            if let currentWeather = currently {
                dispatch_async(dispatch_get_main_queue()) {
                    // Running now in main thread
                    if let temperature = currentWeather.temperature_celsius {
                        self.currentTemperatureLabel?.text = "\(temperature)°"
                    }

                    if let humidity = currentWeather.humidity {
                        self.currentHumidityLabel?.text = "\(humidity)%"
                    }

                    if let precipitation = currentWeather.precipProbability {
                        self.currentPrecipitationLabel?.text = "\(precipitation)%"
                    }

                    if let icon = currentWeather.icon {
                        self.currentWeatherIcon?.image = icon
                    }

                    if let summary = currentWeather.summary {
                        self.currentWeatherSummary?.text = summary
                    }
                    self.currentLocation?.text = userLocation
                    self.toggleRefreshAnimation(false)
                }
            }
        }

    }


@IBAction func refreshWeather() {
    toggleRefreshAnimation(true)
    retrieveWeatherForecast()
}

and my CoreLoactionController

class CoreLocationController : NSObject, CLLocationManagerDelegate {

    var locationManager:CLLocationManager = CLLocationManager()

    var userLongitude: Double
    var userLatitude: Double
    var userLocation: String

    override init() {
        userLatitude = (locationManager.location?.coordinate.latitude)!
        userLongitude = (locationManager.location?.coordinate.longitude)!
        userLocation = ""
        super.init()
        self.locationManager.delegate = self
        self.locationManager.distanceFilter  = 3000                         // Must move at least 3km
        self.locationManager.desiredAccuracy = kCLLocationAccuracyKilometer // Accurate within a kilometer
        self.locationManager.requestWhenInUseAuthorization()
        self.locationManager.startUpdatingLocation()
    }

    func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        print("didChangeAuthorizationStatus")

        switch status {
        case .NotDetermined:
            print(".NotDetermined")
            break

        case .AuthorizedWhenInUse:
            print(".Authorized")
            self.locationManager.startUpdatingLocation()
            break

        case .Denied:
            print(".Denied")
            break

        default:
            print("Unhandled authorization status")
            break

        }
    }

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

        let location = locations.last as! CLLocation

        print("didUpdateLocations:  \(location.coordinate.latitude), \(location.coordinate.longitude)")

        userLatitude = location.coordinate.latitude
        userLongitude = location.coordinate.longitude

        let geocoder = CLGeocoder()
        geocoder.reverseGeocodeLocation(location, completionHandler: { (placemarks, e) -> Void in
            if let error = e {
                print("Error:  \(error.localizedDescription)")
            } else {
                let placemark = placemarks!.last as CLPlacemark?

                let userInfo = [
                    "city":     placemark!.locality,
                    "state":    placemark!.administrativeArea,
                    "country":  placemark!.country
                ]

                print("Location:  \(userInfo)")
                self.userLocation = userInfo["city"]!
            }
            print("test \(self.userLocation)")
        })
        self.locationManager.stopUpdatingLocation()
    }
}

I've tried different things. To start updating the location in the viewDidLoad() function and calling retrieveWeatherForecast() afterwards. I also tried calling retrieveWeatherForecast() in my "func locationManager(manager: CLLocationManager, didUpdateLocations locations: [AnyObject])" function after the city is encoded. And it doesn't work which I don't understand because all the (Refresh-Button) refreshWeather() function is doing, is calling retrieveWeatherForecast(). And no matter where I place the retrieveWeatherForecast() function, it never display the current values or city. I always have to hit the refresh button to display the correct values and city.

So, can someone explain why this is happening? And if someone have a solution for my problem I would glad to hear it. Thank you very much in advance! Maybe Pasan Premaratne can help me?

-David

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David Bauer

David Bauer

Stormy with CoreLocation correct values show only after hitting refresh Button.