Coordinates are nil when selecting annotation on map Swift - ios

Question

I'm changing one part of my app from displaying some shops in a UITableview to display them on a MKMapView and they display fine but I'm getting nil coordinate values when I select the annotations on the map. In didAdd I print them and they are fine, and in fact the annotation is displayed on map.
It has been a while since I last used MapKit and I can't spot if the problem is in the custom annotation class or somewhere else. Can you spot where I'm misusing it?
As always many thanks for you time and help.
This is the annotation class:
class ShopAnnotation: NSObject , MKAnnotation {
var title: String?
var coordinate:CLLocationCoordinate2D
var image: UIImage?
var shopName: String?
var shopLogoUrl: String?
init(title: String, iconImage: UIImage, coordinate:CLLocationCoordinate2D, shopName: String, shopLogoUrl: String) {
self.coordinate = coordinate
self.title = title
self.shopName = shopName
self.shopLogoUrl = shopLogoUrl
self.image = iconImage
}
}
than I have a an array that I take values from :
var availableShopsArray:[(name:String, logoUrl:String, homeLat: String, homeLong: String)] = []
I than loop through it and place an annotation on the map:
func displayShops() {
mapView.removeAnnotations(mapView.annotations)
for shop in availableShopsArray {
let coordinates: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: Double(shop.homeLat)!, longitude: Double(shop.homeLong)!)
let title = "Route Mid"
let image = UIImage(named: title)!
let shopAnn: ShopAnnotation = ShopAnnotation(title: title, iconImage: image, coordinate: coordinates, shopName: shop.name, shopLogoUrl: shop.logoUrl)
mapView.addAnnotation(shopAnn)
}
// self.availableShopsTableview.reloadData()
}
when I select one I should take the values from it, but coordinate is nil :
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
guard let selectedShop = view.annotation as? ShopAnnotation else {return}
self.shopLogoUrl = selectedShop.shopLogoUrl!
self.selectedShopCoordinates.latitude = selectedShop.coordinate.latitude
self.selectedShopCoordinates.longitude = selectedShop.coordinate.longitude
self.selectedShopName = selectedShop.shopName
// calculateBookingType()
self.performSegue(withIdentifier: "bookingToCartSegue", sender: self)
}
and this is viewForAnnotation :
func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? { // rajish version
let annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "")
if annotation is MKUserLocation{
return nil
} else {
print("Annotation.coordinates are: \(String(describing: annotation.coordinate))")
// print("annotation title is: \(String(describing: annotation.title!))")
annotationView.image = UIImage(named:(annotationView.annotation?.title)! ?? "")
annotationView.canShowCallout = true
let transform = CGAffineTransform(scaleX: 0.27, y: 0.27) // alert annotation's icons size
annotationView.transform = transform
// makin allerts draggable
annotationView.isDraggable = false
return annotationView
}
}

Answer 1

Weirdly enough I was assigning latitude and longitude separately to selectedShopCoordinates from selectedShop.coordinateand on that it would find nil.
I now assign them as coordinates as selectedShopCoordinates = selectedShop.coordinate and is not crashing anymore.
Why would it find nil on single coordinates degrees is still a mystery.
Any idea on why would be very much appreciated.
Hope this will help others struggling with it.
Cheers