Adding onClick event to MKAnnotation swift - ios

Question

I am currently getting some locations from a web request using alamofire, store them in my Object array and then display them on a MKMapView.
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: "atm_map_icon")
}
return annotationView
}
And here is where i parse the json, put the result in an array and the loop through the array and add the markers to the map
for var i in 0..<json.count{
let name = json[i]["Name"].string
let address = json[i]["Address"].string
let lat = json[i]["Lat"].double
let lon = json[i]["Lon"].double
let atm = Atm(name: name!,address: address!,lat: lat!,lon: lon!)
self.atmArrayList.append(atm)
}
print(self.atmArrayList.count)
}
for atm in self.atmArrayList{
let atmPin = AtmAnnotation(title: atm.name!, subtitle: atm.address!, atm: atm, coordinate: CLLocationCoordinate2D(latitude: atm.lat!, longitude: atm.lon!))
self.annotationArray.append(atmPin)
}
self.atmMapView.addAnnotations(self.annotationArray)
What i want to achieve is so when the user clicks on the rightCalloutAccessoryView button, i want to pass the specific Atm object of that Annotation to the another ViewController.
My guess is to give the Annotations an id and then get the Atm from the Atm array in that specific position??

Answer 1

You need to implement this method of MapViewDelegate in your viewController
func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
let anotherViewController = self.storyboard?.instantiateViewController(withIdentifier: "anotherViewController") as! AnotherViewController
if let atmPin = view.annotation as? AtmAnnotation
{
anotherViewController.currentAtmPin = atmPin
}
self.navigationController?.pushViewController(anotherViewController, animated: true)
}
Hope this helps