So, Place and annotations are declared inside struct MapView and coordinate is a property of MapView. You should better include all such info in the original post. Generally, when you show your code, you should better show the whole file of interest, that helps readers check what's going on.
As the error message is clearly stating, in your code on the line initializing the instance property annotations, you are trying to use another instance property coordinate, which is not permitted in Swift.
One possible solution would be initializing annotations somewhere else than the property initializer.
struct MapView: View {
var coordinate: CLLocationCoordinate2D
@State private var region = MKCoordinateRegion()
struct Place: Identifiable {
let id = UUID()
let name: String
let coordinate: CLLocationCoordinate2D
}
@State var annotations: [Place] = [] //<-
var body: some View {
Map(coordinateRegion: $region, annotationItems: annotations) {
MapPin(coordinate: $0.coordinate)
}
.onAppear {
setRegion(coordinate)
//↓
annotations = [
Place(name: "Xyz", coordinate: CLLocationCoordinate2D(latitude: coordinate.latitude, longitude: coordinate.longitude))
]
}
}
private func setRegion(_ coordinate: CLLocationCoordinate2D) {
region = MKCoordinateRegion(
center: coordinate,
span: MKCoordinateSpan(latitudeDelta: 0.2, longitudeDelta: 0.2)
)
}
}
