在Xcode iOS开发中放大用户当前位置的MapView

Question

我已经尝试过解决方案solution1 solution2和solution3

但是我所得到的只是一张放大到其他位置的地图，例如旧金山或中东某处。

solution3的最高答案似乎显示了如何打印用户的当前位置，但没有显示如何在地图上使用它。

我的 ViewController.swift 文件

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBOutlet weak var mapView: MKMapView!
    let locationManager = CLLocationManager()
    override func viewDidLoad() {
        super.viewDidLoad()
        self.locationManager.requestAlwaysAuthorization()
        if CLLocationManager.locationServicesEnabled() {
            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
            locationManager.requestAlwaysAuthorization()
            locationManager.startUpdatingLocation()
        }

    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {


        let location = locations.last! as CLLocation

        let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))

        self.mapView.setRegion(region, animated: true)
    }
}