Add Coordinates (from UIViewController) to Constants File - swift

Question

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

Answer 1

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...