Making a circle around my Current Location in Swift

Question

Well, I know there isn't much documentation, examples or tutorials on Swift but I've been trying to read the documentation and it tells me this:

convenience init!(centerCoordinate coord: CLLocationCoordinate2D, radius radius: CLLocationDistance)

I really have no clue what to do. I did this, but it keeps getting errors:

let center = CLLocationCoordinate2D(
        latitude: mapView.userLocation.coordinate.latitude,
        longitude: mapView.userLocation.coordinate.longitude)

let rad = CLLocationDistance(1000)

convenience init!(coord: CLLocationCoordinate2D, radius: CLLocationDistance){
            self.init(radius: rad)
            self.init(coord: center)
    }

I would like to know how to implement this the right way.. I really tried for like 2-3 hours, reading about convenience inits and still nothing.

Answer 1

Yes, the documentation defines the convenience method as:

convenience init!(centerCoordinate coord: CLLocationCoordinate2D, radius radius: CLLocationDistance)

But to use it you use:

MKCircle(centerCoordinate coord: CLLocationCoordinate2D, radius: CLLocationDistance)

So your code would be something like:

let center = CLLocationCoordinate2D(
latitude: mapView.userLocation.coordinate.latitude,
longitude: mapView.userLocation.coordinate.longitude)

let rad = CLLocationDistance(1000)

MKCircle(centerCoordinate: center, radius: rad)

Hope this helps.