Getting the user's location

ViewController.swift

import UIKit
import CoreLocation

class ViewController: UIViewController {
    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()
        locationManager.delegate = self
        locationManager.requestWhenInUseAuthorization()
    }
}

extension ViewController: CLLocationManagerDelegate {
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        switch status {
        case .authorizedAlways,
             .authorizedWhenInUse:
            print("We're allowed to get the user's location.")
            if let location = manager.location {
                print("Current location: \(location.coordinate.longitude), \(location.coordinate.latitude)")
            }
            // I suppose the following line isn't needed if you don't want to get location updates.
            // If you remove the line below, you can remove locationManager(_:, didUpdateLocations:) (lines 36-39) as well.
            locationManager.startUpdatingLocation()
        case .denied:
            print("The user denied access. He/she needs to go to Settings to allow it.")
        case .restricted:
            print("The user doesn't have the permissions to allow the app to see locations. Maybe the user is a child with limited permissions.")
        case .notDetermined:
            print("The user has not decided yet.")
        }
    }

    // The following function is only needed if locationManager.startUpdatingLocation() is called.
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        guard let updatedLocation = locations.last else { return }
        print("Updated location: \(updatedLocation.coordinate.longitude), \(updatedLocation.coordinate.latitude)")
    }
}