Swift - passing data from mapkit annotation to another view by disclosure button - ios

Question

I have a map with annotations, after clicking the pin, the callout shows with title of annotation and a disclosure button. When I tap button the segue is triggered and I move to another view. How to determine what annotation was clicked, or pass the title to another view.
func mapView(mapView: MKMapView!,
viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
if annotation is MKUserLocation{
return nil
}
let reuseId = "pin"
var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView
if(pinView == nil){
pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
pinView!.canShowCallout = true
pinView!.animatesDrop = true
pinView!.pinColor = .Red
var calloutButton = UIButton.buttonWithType(.DetailDisclosure) as UIButton
pinView!.rightCalloutAccessoryView = calloutButton
} else {
pinView!.annotation = annotation
}
return pinView!
}
func mapView(mapView: MKMapView!, annotationView: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
if control == annotationView.rightCalloutAccessoryView {
performSegueWithIdentifier("Detail", sender: self)
}
}
Thanks

Answer 1

You can use MKAnnotation title of annotation property for finding the pins if annotation title is different
annotationView.annotation.title
return String.Compare String to differenciate.
or
Use tag property in pinview
pinView!.tag //set tag for each pin in `viewForAnnotation` method
In
func mapView(mapView: MKMapView!, annotationView: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
//get tag here
if(annotationView.tag == 0){
//Do for 0 pin
}
if control == annotationView.rightCalloutAccessoryView {
performSegueWithIdentifier("Detail", sender: self)
}
}

Answer 2

Try saving the title to you the NSUserDefaults then grabbing that object in the new view. This is the method I use.
func mapView(mapView: MKMapView!, annotationView view: MKAnnotationView!, calloutAccessoryControlTapped control: UIControl!) {
if control == view.rightCalloutAccessoryView{
println(view.annotation.title) // annotation's title
let title = view.annotation.title
NSUserDefaults.standardUserDefaults().setObject(title, forKey: "Title")
var InfoView = self.storyboard?.instantiateViewControllerWithIdentifier("Spot") as! UIViewController
Once you have saved the title to the NSUserDefaults you can simply grab the object in the new "InfoView or whatever you are calling it" like this let spotTitle = NSUserDefaults.standardUserDefaults().objectForKey("SpotTitle") as! String
Hope this helps