Get selected pin coordinate using MapKit framework (Objective-C) - objective-c

Question

I have a map region with about ten annotated MapPin objects (coordinates retrieved from a plist). In the code below 'locations' is a NSMutable array object containing the pin annotation latitude and longitude.
for (int i = 0; i<[locations count]; i++) {
MKCoordinateSpan span = MKCoordinateSpanMake(0, 0);
CLLocationCoordinate2D center = CLLocationCoordinate2DMake(0, 0);
pinRegion = MKCoordinateRegionMake(center, span);
MapPin *pin = [[MapPin alloc] init];
pinRegion.center.longitude = [locations[i][0] doubleValue];
pinRegion.center.latitude = [locations[i][1] doubleValue];
pin.title = names[i];
pin.coordinate = pinRegion.center;
[self.mapView addAnnotation:pin];
}
By selecting any pin I want to return its coordinate. I can inspect any pin object address like this:
NSLog(#"%#", self.mapView.selectedAnnotations);
... shows a unique address for a selected pin such as "<MapPin: 0x16d2f610>"
But I don't know how to access the objects coordinate properties such as longitude and latitude.
Please can you help?
Thank you!

Answer 1

Make sure your map view has its delegate assigned (in this example we will use your view controller)
mapView.delegate = self
Next handle the callback delegate for annotation taps like this:
Swift
func mapView(mapView: MKMapView, didSelectAnnotationView view: MKAnnotationView)
{
if let annotationCoordinate = view.annotation?.coordinate
{
print("User tapped on annotation with title: \(annotationCoordinate")
}
}
Objective - C
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view{
NSLog(view.annotation.coordinate);
}
Let me know if you have any questions