UIKit update of SwiftUI #State causing "Modifying state during view update" - swift

Question

I have a SwiftUI component loading a MapKit like this :
struct AddressView: View {
#State private var showingPlaceDetails = false
var body: some View {
MapView(showPlaceDetails: self.$showPlaceDetails)
}
}
The MapView component is a MapKit struct using UIKit -> SwiftUI wrapping technique :
struct MapView: UIViewRepresentable {
#Binding var showingPlaceDetails: Bool
func makeUIView(context: Context) -> MKMapView {
let map = MKMapView()
map.delegate = context.coordinator
return map
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
final class Coordinator: NSObject, MKMapViewDelegate {
var control: MapView
init(_ control: MapView) {
self.control = control
}
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
// This is where the warning happen
self.control.showingPlaceDetails = true
}
}
}
So mutating showPlaceDetails is firing this warning : [SwiftUI] Modifying state during view update, this will cause undefined behavior.
How should i clean this code ? Is this implementation correct ?
I understand that i am changing thru a #Binding a parent #State property that will re-render AddressView with MapView.
I understand why its bad, like to change a state property inside a render in React and that this mutation should occur outside the body but how can it be done as i need MapView inside the body ?
XCode Version 11.3.1 (11C504)
macOS Version 10.15.4 Beta (19E224g)

Answer 1

The usual fix for this is pending modification, like below
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
DispatchQueue.main.async {
self.control.showingPlaceDetails = true
}
}