touchesBegan/touchesEnded for Apple's MKMapView in SwiftUI

MapView.swift

import SwiftUI
import MapKit

struct ContentView: View {
    @State var region = MKCoordinateRegion()
    @State var touching = false
    
    var body: some View {
        MapView(
            region: $region, 
            onTouchesBegan: {
                touching = true
            },
            onTouchesEnded: {
                touching = false
            }
        )
        .overlay {
            Rectangle()
                .fill(touching ? .red : .blue)
                .frame(width: 20, height: 20)
        }
    }
}

struct MapView: UIViewRepresentable {
    @Binding var region: MKCoordinateRegion
    let onTouchesBegan: () -> Void
    let onTouchesEnded: () -> Void
    
    @State private var mapView = MKMapView()
    
    func makeUIView(context: Context) -> MKMapView {
        mapView.delegate = context.coordinator
        mapView.region = region
        return mapView
    }
    
    func updateUIView(_ uiView: MKMapView, context: Context) {}
    
    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }
    
    class Coordinator: NSObject, MKMapViewDelegate {
        let parent: MapView
        
        init(_ parent: MapView) {
            self.parent = parent
        }
        
        func mapViewDidChangeVisibleRegion(_ mapView: MKMapView) {
            parent.region = mapView.region
            parent.onTouchesBegan()
        }
        
        func mapView(_ mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
            parent.onTouchesEnded()
        }
    }
}