Estoy en el proceso de aprender el desarrollo de aplicaciones iOS 8 con Swift. He seguido un tutorial sobreCasa del árbol que lo guía a través de la construcción de una aplicación meteorológica en Swift e iOS 8.

Como una mejora a la aplicación, el autor / tutor sugiere usarCLLocationManager para obtener la ubicación del dispositivo para alimentar la API meteorológica en lugar de los valores codificados de latitud y longitud.

Entonces, después de leer varios tutoriales en línea, seguí adelante e intenté implementar esta mejora sugerida.

He colocado el código responsable de obtener las coordenadas de ubicación dentro delAppDelegate.swift archivo.

AppDelegate.swift Code

import UIKit
import CoreLocation

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {

    var window: UIWindow?
    var locationManager: CLLocationManager!
    var errorOccured: Bool = false
    var foundLocation: Bool = false
    var locationStatus: NSString = "Not Started"
    var location: CLLocationCoordinate2D?
    var locationName: String?


    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.
        application.setStatusBarHidden(true, withAnimation: .None)
        initializeLocationManager()
        return true
    }

    func initializeLocationManager() {
        self.locationManager = CLLocationManager()
        self.locationManager.delegate = self
        self.locationManager.desiredAccuracy = kCLLocationAccuracyKilometer
        self.locationManager.requestAlwaysAuthorization()
        self.locationManager.startUpdatingLocation()
    }

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
        println("didUpdateLocations running")
        if (foundLocation == false) {
            self.locationManager.stopUpdatingLocation()
            foundLocation = true
            var locationArray = locations as NSArray
            var locationObj = locationArray.lastObject as CLLocation
            var geoCoder = CLGeocoder()
            geoCoder.reverseGeocodeLocation(locationObj, completionHandler: { (placemarks, error) -> Void in
                var p = placemarks as NSArray
                var placemark: CLPlacemark? = p.lastObject as? CLPlacemark
                self.locationName = placemark?.name
            })
            self.location = locationObj.coordinate
        }
    }

    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
        locationManager.stopUpdatingLocation()
        if ((error) != nil) {
            if (errorOccured == false) {
                errorOccured = true
                print(error)
            }
        }
    }

    // authorization status
    func locationManager(manager: CLLocationManager!,
        didChangeAuthorizationStatus status: CLAuthorizationStatus) {
            var shouldIAllow = false

            switch status {
            case CLAuthorizationStatus.Restricted:
                locationStatus = "Restricted Access to location"
            case CLAuthorizationStatus.Denied:
                locationStatus = "User denied access to location"
            case CLAuthorizationStatus.NotDetermined:
                locationStatus = "Status not determined"
            default:
                locationStatus = "Allowed to location Access"
                shouldIAllow = true
            }
            NSNotificationCenter.defaultCenter().postNotificationName("LabelHasbeenUpdated", object: nil)
            if (shouldIAllow == true) {
                NSLog("Location to Allowed")
                // Start location services
                locationManager.startUpdatingLocation()
            } else {
                NSLog("Denied access: \(locationStatus)")
            }
    }

}

Y luego en miViewController.swift archivo Quiero obtener las coordenadas de ubicación. Aquí está el código:

ViewController.swift Code

func getCurrentWeatherData() -> Void {
    let baseURL = NSURL(string: "https://api.forecast.io/forecast/\(apiKey)/")
    var forecastURL: NSURL
    var locName = "London"

    let appDelegate = UIApplication.sharedApplication().delegate as AppDelegate
    appDelegate.foundLocation = false

    if let loc = appDelegate.location {
        println("Got Location!") // for debug purposes
        var currentLat = loc.latitude
        var currentLng = loc.longitude
        forecastURL = NSURL(string: "\(currentLat),\(currentLng)", relativeToURL: baseURL)
        locName = appDelegate.locationName!
    } else {
        println("No Location :(") // for debug purposes
        var currentLat = "51.513445"
        var currentLng = "-0.157828"
        forecastURL = NSURL(string: "\(currentLat),\(currentLng)", relativeToURL: baseURL)
    }

    let sharedSession = NSURLSession.sharedSession()

    let downloadTask: NSURLSessionDownloadTask = sharedSession.downloadTaskWithURL(forecastURL, completionHandler: { (location: NSURL!, response: NSURLResponse!, error: NSError!) -> Void in
        var urlContents = NSString.stringWithContentsOfURL(location, encoding: NSUTF8StringEncoding, error: nil)
        if (error == nil) {
            let dataObject = NSData(contentsOfURL: location)
            let weatherDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(dataObject, options: nil, error: nil) as NSDictionary
            let currentWeather = Current(weatherDictionary: weatherDictionary)
            dispatch_async(dispatch_get_main_queue(), {
                () -> Void in
                self.locationNameLabel.text = "\(locName)"
                self.temperatureLabel.text = "\(currentWeather.temperature)"
                self.iconView.image = currentWeather.icon!
                self.currentTimeLabel.text = "At \(currentWeather.currentTime!) it is"
                self.humidityLabel.text = "\(currentWeather.humidity)"
                self.percipitationLabel.text = "\(currentWeather.percipProbability)"
                self.summaryLabel.text = "\(currentWeather.summary)"
                // Stop refresh animation
                self.refreshActivityIndicator.stopAnimating()
                self.refreshActivityIndicator.hidden = true
                self.refreshButton.hidden = false
            })
        } else {
            let networkIssueController = UIAlertController(title: "Error", message: "Unable to load data. Connectivity error!", preferredStyle: .Alert)
            let okButton = UIAlertAction(title: "OK", style: .Default, handler: nil)
            networkIssueController.addAction(okButton)
            let cancelButton = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
            networkIssueController.addAction(cancelButton)
            self.presentViewController(networkIssueController, animated: true, completion: nil)

            dispatch_async(dispatch_get_main_queue(), { () -> Void in
                self.refreshActivityIndicator.stopAnimating()
                self.refreshActivityIndicator.hidden = true
                self.refreshButton.hidden = false
            })
        }
    })

    downloadTask.resume()
}

Lo anterior esno funciona. MididUpdateLocations nunca se llama al delegado. Y en la consola / salida de depuración siempre obtengoNo Location :( impreso, lo que sugiere una falla al obtener la ubicación, más específicamente sugiriendo que la propiedad de ubicación en miAppDelegate esnil.

Cosas que he hecho para remediar esto:

En la lista de información he agregado las dos clavesNSLocationWhenInUseUsageDescription yNSLocationAlwaysUsageDescriptionAsegurado que estoy conectado a través de WiFi y no Ethernet

E innumerables otros ajustes de código, y aún nada.