Custom MKPointAnnotation isn't responding to user interaction - swift

Question

I am making a Swift application that uses MKPointAnnotations, and I recently ran into an issue where I needed to store metadata in my annotations, so I created the custom class below:
class BRETTFAnnotation: MKPointAnnotation {
var tag: Int64
var name: String
init(lat : Double, lon:Double, t : Int64, n: String) {
self.tag = t
self.name = n
super.init()
self.coordinate = CLLocationCoordinate2D(latitude: lat, longitude: lon)
}
}
My MKAnnotationView viewfor MKAnnotation method is shown below:
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
let newAnnotation = MKPinAnnotationView(annotation: annotation, reuseIdentifier: "reuse")
newAnnotation.canShowCallout = true
let right = self.button(title: "Yes")
right?.addTarget(self, action: #selector(clickedToConfirmNewPoint), for: .touchUpInside)
newAnnotation.rightCalloutAccessoryView = right
let left = self.button(title: "No")
left?.addTarget(self, action: #selector(clickedToCancelNewPoint), for: .touchUpInside)
newAnnotation.leftCalloutAccessoryView = left
return newAnnotation
}
The problem I am running into is when ever I click on my custom BRETTFAnnotation (which I add to my MKMapView) nothing happens. When I was just using the MKPointAnnotation (instead of the BRETTFAnnotation) when I clicked on the map the two buttons on the MKAnnotationView would show. I am trying to get the MKPinAnnotationView to show on touch using my BRETTFAnnotation instead of the MKPointAnnotation.
How can I continue to use my custom annotation and show the callout when the user clicks on the annotation at the same time?
Edit 1: Since it is probably useful the code below is how I make the annotation and add it to the mapView.
let location = gestureRecognizer.location(in: mapView)
let coordinate = mapView.convert(location,toCoordinateFrom: mapView)
print("adding lat,long \(coordinate.latitude),\(coordinate.longitude)")
lastPoint = BRETTFAnnotation(lat: coordinate.latitude, lon: coordinate.longitude, t: 1, n: "")
let annotationView = MKPinAnnotationView(annotation: lastPoint, reuseIdentifier: "reuse")
mapView.addAnnotation(lastPoint)

Answer 1

I fix this problem by making my BRETTFAnnotation a subclass of NSObject and MKAnnotation instead of MKPointAnnotation. Doing this allowed my custom class to receive user interaction and show the callouts.

Answer 2

When you use your own MKAnnoation you can handle your actions in didSelect. Just implement the following code.
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
if let yourAnnotation = view.annotation as? BRETTFAnnotation {
//handle your meta data or/and show UIViews or whatever
}
}
with
func mapView(_ mapView: MKMapView, didDeselect view: MKAnnotationView) {
//getting called when you tap on map or on another annotation (not the selected annotation before)
//hide UIViews or do whatever you want
}
That does work for me:
class ViewController: UIViewController, MKMapViewDelegate {
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
print("didSelect")
if let annoation = view.annotation as? MyAnnoation {
print("metatag \(annoation.metaTag)")
}
}
func mapView(_ mapView: MKMapView, didDeselect view: MKAnnotationView) {
print("didDeselect")
}
override func viewDidLoad() {
super.viewDidLoad()
mapView.delegate = self
let annotation = MyAnnoation(n: "name", m: "metaTag")
annotation.coordinate = CLLocationCoordinate2D(latitude: 50.0, longitude: 8.0)
mapView.addAnnotation(annotation)
}
}
class MyAnnoation: MKPointAnnotation {
var name: String?
var metaTag: String?
init(n: String, m: String) {
self.name = n
self.metaTag = m
}
}