Class instance reference from property

Question

I have a class with an annotation as a property

class UserClass {
   var id : String?
   var annot : MKPointAnnotation?
}

Then I make several instances of this class like:

var user1 = UserClass()

and then define, create and add each user's annotation on the map.

Later in the code user taps on an annotation and I need a reference to the corresponding user instance. How do I get it?

@objc(mapView:didSelectAnnotationView:) func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
    if let annot = view.annotation as? MKPointAnnotation {
        let user = // Need the user instance here to acces user id etc
    }
}

How do you know that a tap on an annotation corresponds to a certain user? — Mo Abdul-Hameed
– Mo Abdul-Hameed, Commented Dec 8, 2017 at 22:20

Santhosh R · Accepted Answer · 2017-12-08 22:42:12Z

0

You probably have all the users in an array in the class you are populating the map view with the annotations. If not, have all the users stored in an array and then:

@objc(mapView:didSelectAnnotationView:) func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
   if let annot = view.annotation as? MKPointAnnotation {
      let user = usersArray.first(where:{$0.annot == annot})
   }
}

answered Dec 8, 2017 at 22:42

Santhosh R

1,5682 gold badges11 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Class instance reference from property

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related