MKAnnotation subclass issues - ios

Question

I upgraded to Swift 1.2 last night, and I got a bug I really can't figure out. The below code worked fine in the previous version of Xcode and Swift.
//MARK: Annotation Object
class PointAnnotation : NSObject, MKAnnotation {
var coordinate: CLLocationCoordinate2D
var title: String
var subtitle: String
var point: Point
var image: UIImage
var md: String
init(point: Point) {
self.coordinate = point.coordinate
self.title = point.title
self.subtitle = point.teaser
self.image = UIImage(named: "annotation.png")!
self.point = point
self.md = point.content
}
}
On line 3, I get the somewhat hard to understand error
Objective-C method 'setCoordinate:' provided by the setter for 'coordinate' conflicts with the optional requirement method 'setCoordinate' in protocol 'MKAnnotation' I tried changing variable names and such, but no help. Does anyone have any idea how to fix this?
The class is for annotations on my mapview.

Answer 1

If you do not require to change coordinates after initialization then you can use it that way. It works for me with Swift 1.2:
class CustomAnnotation : NSObject, MKAnnotation {
let coordinate: CLLocationCoordinate2D
var title: String
init(coordinate: CLLocationCoordinate2D, title: String) {
self.coordinate = coordinate
self.title = title
}
}

Answer 2

You are overriding a readonly ivar in MKAnnotation with a readwrite.
var coordinate: CLLocationCoordinate2D { get }

Answer 3

I had the same issue so I just did this:
private var _coordinate: CLLocationCoordinate2D
var coordinate: CLLocationCoordinate2D {
return _coordinate
}
init(coordinate: CLLocationCoordinate2D) {
self._coordinate = coordinate
super.init()
}
func setCoordinate(newCoordinate: CLLocationCoordinate2D) {
self._coordinate = newCoordinate
}
That way coordinate is still readonly and you can use the setCoordinate method.