Running a map on SwiftUI

Question

Created Jun ’20

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Hello!
Tell me how to properly launch the map and display the user's location? After reading the documentation, I didn't quite understand how to correctly implement the code.
Thank!

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Answer 1

mtsrodrigues OP

Jun ’20

Here is an example that uses CoreLocation to provide a MKCoordinateRegion to a Map:

Code Block swift
class LocationManager: NSObject, ObservableObject, CLLocationManagerDelegate {
    @Published var region = MKCoordinateRegion()
    private let manager = CLLocationManager()
    override init() {
        super.init()
        manager.delegate = self
        manager.desiredAccuracy = kCLLocationAccuracyBest
        manager.requestWhenInUseAuthorization()
        manager.startUpdatingLocation()
    }
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        locations.last.map {
            let center = CLLocationCoordinate2D(latitude: $0.coordinate.latitude, longitude: $0.coordinate.longitude)
            let span = MKCoordinateSpan(latitudeDelta: 0.5, longitudeDelta: 0.5)
            region = MKCoordinateRegion(center: center, span: span)
        }
    }
}
struct ContentView: View {
    @StateObject private var manager = LocationManager()
    var body: some View {
        Map(coordinateRegion: $manager.region, showsUserLocation: true)
    } 
}

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