如何使非类类型符合类协议？

Question

For example, how can I make MapView, which is a 'struct' type conform to CLLocationManagerDelegate which requires a 'class' type for its protocol?

Code Block 
struct  MapView: UIViewRepresentable, CLLocationManagerDelegate {
    var coordinate: CLLocationCoordinate2D
    func makeUIView(context: Context) -> MKMapView {
        MKMapView(frame: .zero)
    }
    func updateUIView(_ uiView: MKMapView, context: Context) {
        let span = MKCoordinateSpan(latitudeDelta: 0.0019, longitudeDelta: 0.0019)
        let region = MKCoordinateRegion(center: coordinate, span: span)
        uiView.setRegion(region, animated: true)
        uiView.mapType = .hybridFlyover
    }
}

Answer 1

The protocol for CLLocationManagerDelegate has been set as type class, and it's made by apple. Thus we can't change it. Any reason you want to make it a struct rather than a class?

Answer 2

As others have noted, you can't, but in this case it's particularly important why. Views are created and destroyed all the time; they're just values. A delegate is a specific object. There's no way for a View to play the role of a delegate. The CLLocationManager would wind having one copy, and you'd be looking at another copy in your view hierarchy. Instead, you need to create some other object, most likely an ObservableObject that tracks whatever location information you need, and the Views will observe that.