SwiftUI MapKit使用协调器-如何访问地图“视图”来调整"didUpdateLocations“中的可视区域？

import SwiftUI
import MapKit

struct MapView: UIViewRepresentable {
    @Binding var region: MKCoordinateRegion
    
    func makeUIView(context: Context) -> MKMapView {
        let mapView = MKMapView()
        mapView.delegate = context.coordinator
        return mapView
    }
    
    func updateUIView(_ view: MKMapView, context: Context) {
        view.setRegion(region, animated: true)
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }
    
    class Coordinator: NSObject, MKMapViewDelegate {
        var parent: MapView
        
        init(_ parent: MapView) {
            self.parent = parent
        }
        
        func mapView(_ mapView: MKMapView, didUpdate userLocation: MKUserLocation) {
            if let location = userLocation.location {
                let region = MKCoordinateRegion(center: location.coordinate, latitudinalMeters: 1000, longitudinalMeters: 1000)
                parent.region = region
            }
        }
    }
}

struct ContentView: View {
    @State private var region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 37.331516, longitude: -122.030028), span: MKCoordinateSpan(latitudeDelta: 0.2, longitudeDelta: 0.2))
    
    var body: some View {
        MapView(region: $region)
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}