iphone Detect selected MKPinAnnotation in a MapView

Question

I have a custom MKPinAnnotation in which I have added a couple of peroperties , like the Id of the object and the type. What I want is when someone selects a pin in the MapView to detect which pin is selected and get that data.

And Show a button on its view to use that data in the button's action.

Can anyone help with this? I can't find how to detect if (and which) an annotation is selected.

Answer 1

There is already a built in method to take care of this situation for you. You need to use the method below. The view.annotation is the annotation that was tapped.

- (void)mapView:(MKMapView *)mapView 
 annotationView:(MKAnnotationView *)view
calloutAccessoryControlTapped:(UIControl *)control
{
    NSLog(@"The annotation tapped is: %@", view.annotation.title);
}

Edit: It can be found here, the API is your friend.

https://developer.apple.com/library/ios/#documentation/MapKit/Reference/MKMapViewDelegate_Protocol/MKMapViewDelegate/MKMapViewDelegate.html#//apple_ref/doc/uid/TP40008204