Writing to CoreData on LocationManager Update - swiftui

Question

currently I am playing around with swiftui, CoreData and CoreLocation.
My goal is to store waypoints and calculate their distances to the current Location while moving. These distances should be written to CoreData and shown in the UI.
I am getting location updates in the Location Managers "didUpdateLocations", but what is the smartest way to write to CoreData from here?
I thought, I could just "merge" the DataController and LocationManager into one class, but
1: I can not access CoreData in the DataController itself
2: I can not create an observed object of the LocationManager anymore, since it does not provide a fetchrequest.
I'd really appreciate a slight hint here, since I don't know what to google anymore ;)
My DataController looks like this:
import CoreData
import Foundation
class DataController: ObservableObject {
let container = NSPersistentContainer(name: "Positions")
init() {
container.loadPersistentStores { description, error in
if let error = error {
print("Core Data failed to load: \(error.localizedDescription)")
}
}
}
}
And my LocationManager looks like this:
import Foundation
import Combine
import CoreLocation
class LocManager: NSObject, ObservableObject, CLLocationManagerDelegate {
#Published var location: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: 0, longitude: 0)
#Published var altitude: Double = 0
#Published var degrees: Double = 0
private let locationManager: CLLocationManager
override init() {
//LocationManager INIT
self.locationManager = CLLocationManager()
super.init()
self.locationManager.delegate = self
self.setup()
}
private func setup() {
// set accuracy
self.locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation
//update filter
//self.locationManager.headingFilter = kCLHeadingFilterNone //High Power usage
self.locationManager.headingFilter = 0.5
self.locationManager.distanceFilter = 1
if CLLocationManager.headingAvailable() {
self.locationManager.startUpdatingLocation()
self.locationManager.startUpdatingHeading()
}
}
func locationManager(_ manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) {
self.degrees = -1 * newHeading.magneticHeading
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
location = locations.first!.coordinate
altitude = locations.first!.altitude
/*
I cant access CoreData here, can I?
*/
}
func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) {
switch locationManager.authorizationStatus {
case .authorizedWhenInUse:
locationManager.requestWhenInUseAuthorization()
break
case .restricted:
break
case .denied:
break
case .notDetermined:
locationManager.requestWhenInUseAuthorization()
break
default:
break
}
}
}
Thanks for your help!