Selecting the object at index in a MapView in SWIFT - swift

Question

I am trying to present another view controller once the right callout button is pressed but it must go to the correct indexPath, similar to how this happens in a table view. this is where I am up to:
I have created a custom annotation like so:
class annotationCustom: NSObject, MKAnnotation {
var coordinate : CLLocationCoordinate2D
var title : NSString!
var subtitle : NSString!
var isUserAnnotation : Bool
var dataImage = [NSData]()
init(coordinate: CLLocationCoordinate2D, title: NSString!, subtitle: NSString!){
self.coordinate = coordinate
self.title = title
self.subtitle = subtitle
self.isUserAnnotation = false
}
}
and then set the viewForAnnotation like so:
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
var dqPin = "pin"
var view = mapView.dequeueReusableAnnotationViewWithIdentifier(dqPin) as? MKPinAnnotationView
view = MKPinAnnotationView(annotation: annotation, reuseIdentifier: dqPin)
view!.canShowCallout = true
var arrowBut = UIImage(named: "arrow")
var arrowButton = UIButton()
arrowButton.setImage(arrowBut, forState: UIControlState.Normal)
arrowButton.tintColor = UIColor.blackColor()
arrowButton.frame = CGRectMake(0, 0, 30, 30)
view!.rightCalloutAccessoryView = arrowButton
}
return view
}
Now I know I have to use the function:
func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
if control == view.rightCalloutAccessoryView {
let sb = UIStoryboard(name: "Main", bundle: nil)
let userProfileVC = sb.instantiateViewControllerWithIdentifier("usersProfileVC") as UsersProfilesViewController
userProfileVC.profileName = annotationCustom.title // error: 'annotationCustom.Type' does not have a member named 'title'
performSegueWithIdentifier("goToUserFromMap", sender: self)
}
}
}
Can somebody fill in the gaps or help me out please.
Thanks

Answer 1

Instead of:
if control == annotationView.rightCalloutAccessoryView {
it should be:
if control == view.rightCalloutAccessoryView {
view is the internal, private name of the parameter and annotationView is the external name visible to the caller.
However, in this case, you don't really need to check control in the first place since your callouts have only a single control (rightCalloutAccessoryView). They don't have a leftCalloutAccessoryView so there's only one control the user could tap.
func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
println("disclosure pressed on: \(view.annotation.title)")
}
By the way, is the code shown in viewForAnnotation the actual code? Because it looks like the result of the dequeueReusableAnnotationViewWithIdentifier is ignored and there is a mysterious extra closing } before the return view.
Here:
userProfileVC.profileName = annotationCustom.title
annotationCustom is the name of your class -- not the instance of it (also, convention is to start class names with a capital letter). view.annotation is the instance here. Cast it as annotationCustom to access any custom properties (though title isn't custom):
if let ac = view.annotation as? annotationCustom {
userProfileVC.profileName = ac.title
}