Swift 4 CoreLocation not working - ios

Question

why this code does not working? I guess it's something with didUpdateLocations overrated method? How I can correctly connect them with my labels and make them a live :)
import UIKit
import CoreLocation
class MainVC: UIViewController, CLLocationManagerDelegate {
var walking = false
var pause = false
var locationManager: CLLocationManager = CLLocationManager()
var startLocation: CLLocation!
var speed: CLLocationSpeed = CLLocationSpeed()
#IBOutlet weak var latitudeLabel: UILabel!
#IBOutlet weak var longitudeLabel: UILabel!
#IBOutlet weak var horizontalAccuracyLabel: UILabel!
#IBOutlet weak var verticalAccuracyLabel: UILabel!
#IBOutlet weak var distanceLabel: UILabel!
#IBOutlet weak var altitudeLabel: UILabel!
#IBOutlet weak var speedLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
locationManager.startUpdatingHeading()
startLocation = nil
// Ask for Authorisation from the User.
self.locationManager.requestAlwaysAuthorization()
// For use in foreground
self.locationManager.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.startUpdatingLocation()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func startDistance(_ sender: UIButton) {
startLocation = nil
walking = true
}
#IBAction func stopDistance(_ sender: UIButton) {
walking = false
}
#IBAction func resetDistance(_ sender: UIButton) {
startLocation = nil
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let latestLocation: AnyObject = locations[locations.count - 1]
latitudeLabel.text = String(format: "%.4f",latestLocation.coordinate.latitude)
longitudeLabel.text = String(format: "%.4f",latestLocation.coordinate.longitude)
horizontalAccuracyLabel.text = String(format: "%.4f",latestLocation.horizontalAccuracy)
verticalAccuracyLabel.text = String(format: "%.4f",latestLocation.verticalAccuracy)
altitudeLabel.text = String(format: "%.4f",latestLocation.altitude)
if walking == true {
if startLocation == nil {
startLocation = latestLocation as! CLLocation
speed = locationManager.location!.speed
speedLabel.text = String(format: "%.0f km/h", speed * 3.6)
}
let distanceBetween: CLLocationDistance =
latestLocation.distance(from: startLocation)
distanceLabel.text = String(format: "%.2f", distanceBetween)
}
}
func locationManager(_ manager: CLLocationManager, didUpdateHeading newHeading: CLHeading)
{
// capLabel.text = String(format: "%.4f",newHeading.magneticHeading)
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
}
}
I also added: Location Always Usage Description in my info.plist
And i allowed Location in the Settings on my simulator too.
Thank you.

Answer 1

To configure always authorization in Swift 4 for location services which I can see you have written in your code self.locationManager.requestAlwaysAuthorization(), do the following:
There is a new key NSLocationAlwaysAndWhenInUsageDescription which is also required in your info.plist
<key>NSLocationAlwaysUsageDescription</key>
<string> location permission text.</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string> location permission text.</string>
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string> location permission text.</string>
Take a look in the documentation here
You are required to include the NSLocationWhenInUseUsageDescription
and NSLocationAlwaysAndWhenInUsageDescription keys in your app's
Info.plist file. (If your app supports iOS 10 and earlier, the
NSLocationAlwaysUsageDescription key is also required.) If those keys
are not present, authorization requests fail immediately.
So we will have a single prompt now.