Swift: MapKit Custom Image Annotation - ios

Question

In my app, I have a mapkit and annotations with different colors. But, there are just three color options (red, green, purple). So, I need to change annotations with custom image.
I've followed this tutorial to create my mapview
Now, I have a Artwork class:
import Foundation
import MapKit
class Artwork: NSObject, MKAnnotation {
let title: String
let locationName: String
let color: String
let coordinate: CLLocationCoordinate2D
init(title: String, locationName: String, color: String, coordinate: CLLocationCoordinate2D) {
self.title = title
self.locationName = locationName
self.color = color
self.coordinate = coordinate
super.init()
}
var subtitle: String {
return locationName
}
// pinColor for disciplines: Sculpture, Plaque, Mural, Monument, other
func pinColor() -> MKPinAnnotationColor {
switch color {
case "Red":
return .Red
case "Purple":
return .Purple
case "Green":
return .Green
default:
return .Green
}
}
}
Also, VCMapView.swift file:
import Foundation
import MapKit
extension MapViewController: MKMapViewDelegate {
// 1
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
if let annotation = annotation as? Artwork {
let identifier = "pin"
var view: MKPinAnnotationView
if let dequeuedView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier)
as? MKPinAnnotationView { // 2
dequeuedView.annotation = annotation
view = dequeuedView
} else {
// 3
view = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
view.canShowCallout = true
view.calloutOffset = CGPoint(x: -5, y: 5)
view.rightCalloutAccessoryView = UIButton.buttonWithType(.DetailDisclosure) as! UIView
}
view.pinColor = annotation.pinColor()
return view
}
return nil
}
}
And I can add pins on my map like this in viewdidload()
// show artwork on map
let artwork = Artwork(title: "\(self.plate)",
locationName: "\(self.location)",
color: "\(self.color)",
coordinate: CLLocationCoordinate2D(latitude: latitude, longitude: longtitude))
self.mapView.addAnnotation(artwork)
All work perfect but need to add custom image to this architecture, which part should I modify I am not sure.

Answer 1

In your architecture in my opinion, you should add an image property in the Artwork class and then use id in the .image property of MKPinAnnotationView.
ex:
view = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
view.canShowCallout = true
view.calloutOffset = CGPoint(x: -5, y: 5)
view.rightCalloutAccessoryView = UIButton.buttonWithType(.DetailDisclosure) as! UIView
}
view.image = UIImage(named:"your_image")
view.frame.size = CGSize(width: 30.0, height: 30.0) //not necessary but just to give you an idea how to resize just in case it is too large.