MKAnnotationView Now Showing AccessoryItem - swift

Question

I have tried following different tutorials to make my MKAnnotations have an accessory item that will segue to a different page when clicked; however, I cannot get the item to show. Here is the code I've come up with after reviewing different sources:
extension MapController : MKMapViewDelegate {
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
let identifier = "PlaceAnnotation"
if annotation is PlaceAnnotation {
var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: identifier)
if annotationView == nil {
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
annotationView!.canShowCallout = true
} else {
annotationView!.annotation = annotation
}
annotationView!.leftCalloutAccessoryView = nil
annotationView!.rightCalloutAccessoryView = UIButton(type: UIButtonType.detailDisclosure)
return annotationView
}
return nil
}
func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
let place = view.annotation as! PlaceAnnotation
let placeName = place.title
print(placeName!)
let placeInfo = place.placeObject
let ac = UIAlertController(title: placeInfo?.title, message: placeInfo?.description, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
}
}
Then, to create the annotation, I have this:
for place in places {
let placeCoord = CLLocationCoordinate2D(latitude: CLLocationDegrees(place.latitude)!, longitude: CLLocationDegrees(place.longitude)!)
let annotation = PlaceAnnotation(title: place.title, coordinate: placeCoord, placeObject: place)
mapView.addAnnotation(annotation)
}
And the PlaceAnnotation class is as follows:
class PlaceAnnotation: NSObject, MKAnnotation {
var coordinate: CLLocationCoordinate2D
var title: String?
var placeObject: Location?
init(title: String, coordinate: CLLocationCoordinate2D, placeObject: Location) {
self.title = title
self.coordinate = coordinate
self.placeObject = placeObject
}
}
The only thing that displays on the annotation when clicked is the Title, but nothing else. I appreciate any help, thank you very much!
(I am working in Swift 3)

Answer 1

I tried your code and it works perfectly fine for me.
But when I removed say,
mapView.delegate = self
Accessory item did not show up, because the delegate is not called.