Pfthb

I pulled the coordinates from the user in my main view controller like this:

import CoreLocation

private let locationManager = CLLocationManager()

func findCurrentLocation() 
 locationManager.delegate = self
 locationManager.desiredAccuracy = kCLLocationAccuracyBest
 locationManager.requestWhenInUseAuthorization()

 if CLLocationManager.locationServicesEnabled() 
 locationManager.startUpdatingLocation()
 //locationManager.startUpdatingHeading
 
 

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) 
 guard let locValue: CLLocationCoordinate2D = manager.location?.coordinate else return 
 print("locations = (locValue.latitude) (locValue.longitude)")
 

I then have this URL in a separate file (my constants file)

let NEAREST_CITY_URL = BASE_URL + "nearest_city?lat=LATITUDE&lon=LONGITUDE&key=" + API_KEY

I need to get the latitude and longitude from the view controller into that URL. How would I pass it there?

I assume it needs to look something like this, but I can't figure out how to compile it without errors.

let NEAREST_CITY_URL = BASE_URL + "nearest_city?lat=(MainVC.locationManager.locValue.latitude)&lon=(MainVC.locationManager.locValue.longitude)&key=" + API_KEY

MainVC needs to set the data into your constants file, as a global variable (since you seem to desire using globals... eek). Then you can offer a NEAREST_CITY_URL that computes a string using that data.

In your constants file:

var userLoc : CLLocationCoordinate2D?

let NEAREST_CITY_URL = BASE_URL + "nearest_city?lat=(userLoc.latitude ?? 0.0)&lon=(userLoc.longitude ?? 0.0)&key=" + API_KEY

In your view controller:

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) 
 guard let locValue: CLLocationCoordinate2D = manager.location?.coordinate else return 
 print("locations = (locValue.latitude) (locValue.longitude)")
 userLoc = locValue

Now it's really bad to have a global constants file like you're doing... at the very least, place all your constants into a singleton class named Constants. But I'm just here to directly answer your question, so...