Location manager didUpdateLocations not being called - ios

Question

For some reason didUpdateLocations is not being called, even when I set the delegate to the view controller. In info.plist I set the key Privacy - Location When In Use Usage Description to a description. So I'm not sure what I could be doing wrong?
import MapKit
import CoreLocation
class OptionsViewController: UIViewController, UITableViewDelegate, CLLocationManagerDelegate {
override func viewDidLoad() {
//Ask user for location
locationManager = CLLocationManager()
locationManager.requestWhenInUseAuthorization()
//Use users current location if no starting point set
if CLLocationManager.locationServicesEnabled() {
let locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startUpdatingLocation()
}
}
override func viewDidAppear(_ animated: Bool) {
locationManager = CLLocationManager()
locationManager.requestWhenInUseAuthorization()
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error){
locationManager.stopUpdatingLocation()
print(error)
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print("Did update location called?")
let locValue:CLLocationCoordinate2D = manager.location!.coordinate
print("locations = \(locValue.latitude) \(locValue.longitude)")
}
}

Answer 1

Problem is here:
override func viewDidAppear(_ animated: Bool) {
locationManager = CLLocationManager()
locationManager.requestWhenInUseAuthorization()
}
This method will be called after viewDidLoad, but you new created a locationManager later in viewDidAppear and not pointed its delegate to self. That's why the delegate(self)'s methods is not be called.
The improved but not the best way is:
class OptionsViewController: UIViewController, UITableViewDelegate, CLLocationManagerDelegate {
let locationManager = CLLocationManager()
override func viewDidLoad() {
//Ask user for location
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
//Use users current location if no starting point set
if CLLocationManager.locationServicesEnabled() {
if CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedWhenInUse
|| CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedAlways {
locationManager.startUpdatingLocation()
}
else{
locationManager.requestWhenInUseAuthorization()
}
}
else{
//Alert user to open location service, bra bra bra here...
}
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
//... nothing need to do for location here
}
public func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
if status == CLAuthorizationStatus.authorizedWhenInUse
|| status == CLAuthorizationStatus.authorizedAlways {
locationManager.startUpdatingLocation()
}
else{
//other procedures when location service is not permitted.
}
}
//......
}