CODEWITHSUNDEEP
swiftmapkitmkannotationmkmapitem
jvan
jvan

Reputation: 173

MKPointAnnotation to MKMapItem

I'm getting an error "Could not cast value of type 'NSKVONotifying_MKPointAnnotation' to 'MKMapItem'" when trying to open Apple Maps for directions. I'm new at this and I've been piecing together code to try to make it work. 

struct Location {
    let agencyId: String
    let agencyEventId: String
    let agencyEventSubTypeCode: String
    let latitude: Double
    let longitude: Double
    let agencyEventTypeCode: String
}

func multiPoint() {

    for receivedEvent in receivedEventsList {
        mapEventLatitude = receivedEvent.latitude!
        mapEventLongitude = receivedEvent.longitude!
        latDouble = ("\(mapEventLatitude))" as NSString).doubleValue
        longDouble = ("\(mapEventLongitude))" as NSString).doubleValue
        multiMapAgencyEventSubTypeCode = receivedEvent.agencyEventSubtypeCode!
        multiMapAgencyId = receivedEvent.agencyId!
        multiMapAgencyEventId = receivedEvent.agencyEventId!
        multiMapAgencyEventTypeCode = receivedEvent.agencyEventTypeCode!

        let locations = [
            Location(agencyId: multiMapAgencyId, agencyEventId: multiMapAgencyEventId, agencyEventSubTypeCode: multiMapAgencyEventSubTypeCode, latitude: latDouble, longitude: longDouble, agencyEventTypeCode: multiMapAgencyEventTypeCode)
            ]


        for location in locations {
            let annotation = MKPointAnnotation()
            annotation.coordinate = CLLocationCoordinate2D(latitude: location.latitude, longitude: location.longitude)
            annotation.title = location.agencyId
            annotation.subtitle = multiMapAgencyEventSubTypeCode
            multiEventMap?.addAnnotation(annotation)
            eventTypeNumber = ("\(multiMapAgencyEventTypeCode))" as NSString).intValue
        }
    }
}

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    let reuseIdentifier = "annotationView"
    let view = MKMarkerAnnotationView(annotation: annotation, reuseIdentifier: reuseIdentifier)
        view.markerTintColor = UIColor.blue
        view.glyphText = "x"
        view.displayPriority = .required
        view.clusteringIdentifier = nil
        view.canShowCallout = true
        view.rightCalloutAccessoryView = UIButton(type: .detailDisclosure)
    return view
}

func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
    let location =  view.annotation as! MKMapItem
    let launchOptions = [MKLaunchOptionsDirectionsModeKey: MKLaunchOptionsDirectionsModeDriving]
    location.openInMaps(launchOptions: launchOptions)
}

Upvotes: 1

Views: 906

Answers (1)

Rob
Rob

Reputation: 438232

When you add your annotations to your map, you added them as MKPointAnnotation, so the cast to MKMapItem will obviously fail.

I’d suggest that instead of creating MKPointAnnotation, create either a MKPlacemark or create your own subclass of MKPlacemark that includes the additional properties that you’re interested in. Then your calloutAccessoryControlTapped can

  • cast the view.annotation to your placemark type;
  • create a MKMapItem using that placemark; and then
  • mapItem.openInMaps(launchOptions:)

Upvotes: 0

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