How to set DIFFERENT image pins in different locations SWIFT - ios

Question

I'm trying to code an app that displays different images on a AppleMap. I managed to set one image pin but I don't know how to set different images.
In my view didLoad I wrote :
self.pin = AnnotationPin(title: sport, subtitle: "ouiii", coordinate: coordinate)
self.MyMapView.addAnnotation(self.pin)
In the viewcontroller I have:
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
guard !(annotation is MKUserLocation) else {
return nil
}
let annotationIdentifier = "AnnotationIdentifier"
var annotationView: MKAnnotationView?
if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier) {
annotationView = dequeuedAnnotationView
annotationView?.annotation = annotation
}
else {
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
annotationView?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
}
if let annotationView = annotationView {
annotationView.canShowCallout = true
annotationView.image = UIImage(named: "kite")
}
return annotationView
}
I made another swift file called annotation which contains:
class AnnotationPin: NSObject, MKAnnotation {
let coordinate: CLLocationCoordinate2D
let title: String?
let subtitle: String?
init(title:String, subtitle: String, coordinate: CLLocationCoordinate2D) {
self.title = title
self.subtitle = subtitle
self.coordinate = coordinate
super.init()
}}
I already called this class for subtitles and titles and I suppose I can call it again to choose my Image. But I don't know how to do it, and I don't find answers on other topics.

Answer 1

You can add an image property to your AnnotationPin class and then in viewForAnnotation you use a conditional downcast to see if you are dealing with one of your annotations. If you are then you can use the image property
class AnnotationPin: NSObject, MKAnnotation {
let coordinate: CLLocationCoordinate2D
let title: String?
let subtitle: String?
let image: UIImage?
init(title:String, subtitle: String, image: UIImage, coordinate: CLLocationCoordinate2D) {
self.title = title
self.subtitle = subtitle
self.coordinate = coordinate
self.image = image
super.init()
}}
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
guard let myAnnotation = annotation as? AnnotationPin else {
return nil
}
let annotationIdentifier = "AnnotationIdentifier"
var annotationView: MKAnnotationView?
if let dequeuedAnnotationView = mapView.dequeueReusableAnnotationView(withIdentifier: annotationIdentifier) {
annotationView = dequeuedAnnotationView
annotationView?.annotation = annotation
}
else {
annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: annotationIdentifier)
annotationView?.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
}
if let annotationView = annotationView {
annotationView.canShowCallout = true
annotationView.image = myAnnotation.image
}
return annotationView
}