MapKit zoom to user current location
I faced similar issue and wasted 4 days thinking whats going wrong. Finally resolved with creating these lines of code in viewDidLoad
Method :
//Zoom to user location
let noLocation = CLLocationCoordinate2D()
let viewRegion = MKCoordinateRegionMakeWithDistance(noLocation, 200, 200)
mapView.setRegion(viewRegion, animated: false)
mapView.showsUserLocation = true
In ViewDidLoad
Method add these new changes code :
override func viewDidLoad() {
super.viewDidLoad()
let locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
// Check for Location Services
if (CLLocationManager.locationServicesEnabled()) {
locationManager.requestAlwaysAuthorization()
locationManager.requestWhenInUseAuthorization()
}
//Zoom to user location
if let userLocation = locationManager.location?.coordinate {
let viewRegion = MKCoordinateRegionMakeWithDistance(userLocation, 200, 200)
mapView.setRegion(viewRegion, animated: false)
}
self.locationManager = locationManager
DispatchQueue.main.async {
self.locationManager.startUpdatingLocation()
}
}
Hope this helps to resolve your issue. Feel free to post comment if any further issue. Thanks
In Swift 4.2 there has been changes with this code. Here is how it works now:
import UIKit
import MapKit
import CoreLocation
class MapVC: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {
@IBOutlet weak var mapView: MKMapView!
var locationManager = CLLocationManager()
let authorizationStatus = CLLocationManager.authorizationStatus()
let regionRadius: Double = 1000
override func viewDidLoad() {
super.viewDidLoad()
mapView.delegate = self
locationManager.delegate = self
configureLocationServices()
}
func centerMapOnUserLocation() {
guard let coordinate = locationManager.location?.coordinate else {return}
let coordinateRegion = MKCoordinateRegion(center: coordinate, latitudinalMeters: regionRadius, longitudinalMeters: regionRadius)
mapView.setRegion(coordinateRegion, animated: true)
}
func configureLocationServices() {
if authorizationStatus == .notDetermined {
locationManager.requestAlwaysAuthorization()
} else {
return
}
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
centerMapOnUserLocation()
}
}
Here's another approach for Swift 3, XCode 8.2. First, write out a helper function:
let homeLocation = CLLocation(latitude: 37.6213, longitude: -122.3790)
let regionRadius: CLLocationDistance = 200
func centerMapOnLocation(location: CLLocation)
{
let coordinateRegion = MKCoordinateRegionMakeWithDistance(location.coordinate,
regionRadius * 2.0, regionRadius * 2.0)
mapView.setRegion(coordinateRegion, animated: true)
}
Then, call in in viewDidLoad()
mapView.showsUserLocation = true
centerMapOnLocation(location: homeLocation)
This will start the app with the location specified in the variable zoomed in.