Could not retrieve region info - monitoring not working - swiftui

Question

Here's my code. As soon as I fire up the app in Simulator. I see following messages in the debug window.
2020-05-02 23:01:37.931720-0400 SwiftMapView[42245:6851218] Metal API Validation Enabled
2020-05-02 23:01:38.216200-0400 SwiftMapView[42245:6851218] libMobileGestalt MobileGestalt.c:1647: Could not retrieve region info
import SwiftUI
import MapKit
struct MapView: UIViewRepresentable {
var locationManager = CLLocationManager()
func setupManager() {
locationManager.desiredAccuracy = kCLLocationAccuracyBest
//locationManager.requestWhenInUseAuthorization()
locationManager.requestAlwaysAuthorization()
// Set Geofencing region
//let locValue:CLLocationCoordinate2D = self.locationManager.location!.coordinate
let locValue:CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: 15.833826, longitude: 78.845220)
let geofencingRegion: CLCircularRegion = CLCircularRegion(center:locValue, radius: 100, identifier: "Crap")
geofencingRegion.notifyOnExit = true
geofencingRegion.notifyOnEntry = true
// Start monitoring
locationManager.startMonitoring(for: geofencingRegion)
}
func makeUIView(context: Context) -> MKMapView {
setupManager()
let mapView = MKMapView(frame: UIScreen.main.bounds)
//mapView.centerCoordinate = CLLocationCoordinate2D(latitude: 15.833826, longitude: 78.845220)
mapView.showsUserLocation = true
mapView.userTrackingMode = .follow
return mapView
}
func updateUIView(_ uiView: MKMapView, context: Context) {
// Show current user location
//uiView.showsUserLocation = true
// Requst location when in use
self.locationManager.requestAlwaysAuthorization()
if CLLocationManager.locationServicesEnabled()
&& (CLLocationManager.authorizationStatus() == .authorizedAlways || CLLocationManager.authorizationStatus() == .authorizedWhenInUse)
{
//self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
self.locationManager.startUpdatingLocation()
let locValue:CLLocationCoordinate2D = self.locationManager.location!.coordinate
let coordinate = CLLocationCoordinate2D(latitude: locValue.latitude, longitude: locValue.longitude)
let span = MKCoordinateSpan(latitudeDelta: 0, longitudeDelta: 0)
let region = MKCoordinateRegion(center: coordinate, span: span)
uiView.setRegion(region, animated: true)
}
}
}
class MapAppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate {
var locationManager: CLLocationManager?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
self.locationManager = CLLocationManager()
self.locationManager!.delegate = self
return true
}
}
extension MapAppDelegate{
func locationManager(_ manager: CLLocationManager, didExitRegion region: CLRegion) {
print("Hello World")
}
func locationManager(_ manager: CLLocationManager, didEnterRegion region: CLRegion) {
print("Welcome Home")
}
}

Answer 1

In simulator you have to add a location, then your code works for me (at least if your info.plist is correct):