did select annotation for multiple markers - iphone

Question

I am adding multiple markers in the map view like this,
markers = [jsonDict objectForKey:key];
for (id k in markers) {
if ([k isEqualToString:#"latitude"]) {
mlat = [markers objectForKey:k];
dlat = [mlat doubleValue];
}
else if ([k isEqualToString:#"longitude"]) {
mlng = [markers objectForKey:k];
dlng = [mlng doubleValue];
}
else if ([k isEqualToString:#"file"]){
murl = [markers objectForKey:k];
}
else if ([k isEqualToString:#"comment"]){
mcomment = [markers objectForKey:k];
}
}
annotationCoord.latitude = dlat;
annotationCoord.longitude = dlng;
MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init];
annotationPoint.coordinate = annotationCoord;
[self.navimap addAnnotation:annotationPoint];
now, i would like to get the value of "comment" and "file" for each marker in the didSelectAnnotationView. it would be grateful if anybody helps me in this.

Answer 1

You should create a custom annotation class and use it rather than MKPointAnnotation:
#import <MapKit/MapKit.h>
#interface Marker : NSObject <MKAnnotation>
#property (nonatomic, copy) NSString *title;
#property (nonatomic, copy) NSString *subtitle;
#property (nonatomic) CLLocationCoordinate2D coordinate;
#property (nonatomic,copy) NSString* url;
#property (nonatomic,copy) NSString* comment;
#end
You would then implement didSelectAnnotationView like this:
-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
if ([view.annotation isKindOfClass:[Marker class]]) {
Marker* marker = view.annotation;
NSLog(#"selected marker %#", marker);
}
}