Subclassing CCHMapClusterAnnotation

[briomusic]

Hi, in my original cluster-free setup, I created a subclass of MKPointAnnotation, so I could add a reference to an object that contained additional information. (This is because my custom callout requires more info than title and subtitle). After adding CCHMapClusterController I changed my code to create a subclass of CCHMapClusterAnnotation to which I then added my additionally required properties. I can add these BZAnnotation : CCHMapClusterAnnotation instances to the mapClusterController - however, in mapView:viewForAnnotation: they always come back as CCHMapClusterAnnotation and the additional info is lost (even when the CCHMapClusterAnnotation is not a cluster) . How can I make a CCHMapClusterAnnotation keep a reference to my custom object? Thanks.

[choefele]

No need to subclass CCHMapClusterAnnotation – simply keep your custom annotation a subclass of MKPointAnnotation and add it to CCHMapClusterController. CCHMapClusterAnnotations are the container for clustered annotations. Your custom annotation will be inside the array stored in the annotations property.

[briomusic]

This works great - vielen Dank!

[HTKT]

@briomusic : Can you give a sample code? I also have the same problem. THanks

[FelipeCardoso89]

@HTKT

Code example:

//This method is inside `MyCustomClusterAnnotationView` class
//and will return a custom pin callout only if contains a unique annotation
 private func setupCallout() -> UIView? {

    guard let calloutView = CustomCalloutView.instanciateFromNib() else {
      return nil
    }

    guard let clusterAnnotation = self.annotation as? CCHMapClusterAnnotation else {
      return nil
    }

    if !clusterAnnotation.isUniqueLocation() {
      return nil
    }
    //Like @choefele said, your custom annotation will be inside `annotations` property.
    guard let customAnnotation = clusterAnnotation.annotations.first! as? MyCustomAnnotation else {
      return nil
    }

    calloutView.lblTitle.text = customAnnotation.street
    calloutView.lblSubtitle.text = customAnnotation.city
    return calloutView
  }

[happiehappie]

Hi, I tried subclassing CCHMapClusterAnnotation cause I need to add an image property. So every cluster has a custom image. However, even if
let annotation = DiscoverMapAnnotation(title: "10% Weekend spree", locationName: "Nu Sentral", discipline: "Shopping Mall", coordinate: CLLocationCoordinate2D(latitude: 3.133369, longitude: 101.686874))
self.mapClusterController.addAnnotations([annotation], withCompletionHandler: nil)

let annotation = DiscoverMapAnnotation(title: "10% Weekend spree", locationName: "Nu Sentral", discipline: "Shopping Mall", coordinate: CLLocationCoordinate2D(latitude: 3.133369, longitude: 101.686874)) self.mapClusterController.addAnnotations([annotation], withCompletionHandler: nil)
my if let annotation = annotation as? DiscoverMapAnnotation still fails and will only react to if let annotation = annotation as? CCHMapClusterAnnotation {

Am I doing this wrongly?
Cause in my case every annotation should have a different image (passed from server)