Using a custom annotation when adding it to map - iphone

Question

I'm having trouble accessing my custom annotation class when adding it to a mapview. I have the custom class working properly but i when i add it to the map i'm not sure how to access the custom annotation through this delegate:
- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
i've tried looking online and havent found anything. any help would be great.
Its called like this:
CLLocationCoordinate2D coords = CLLocationCoordinate2DMake(shops.latitude, shops.longitude);
AnnotationForId *shop = [[AnnotationForId alloc] initWithCoordinate:coords];
//[[CLLocationCoordinate2DMake(shops.latitude, shops.longtitude)]];
shop.title = shops.name;
shop.subtitle = #"Coffee Shop";
shop.shopId = shops.id;
[map addAnnotation:shop];

Answer 1

This is Simple Example For how to Create Custom AnnotationView.
Create custom AnnotationView:
#import <MapKit/MapKit.h>
#interface AnnotationView : MKPlacemark
#property (nonatomic, readwrite, assign) CLLocationCoordinate2D coordinate;
#property (nonatomic, strong) NSString *title;
#property (nonatomic, strong) NSString *subtitle;
// you can put here any controllers that you want. (such like UIImage, UIView,...etc)
#end
And in .m file
#import "AnnotationView.h"
#implementation AnnotationView
- (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate addressDictionary:(NSDictionary *)addressDictionary
{
if ((self = [super initWithCoordinate:coordinate addressDictionary:addressDictionary]))
{
self.coordinate = coordinate;
}
return self;
}
#end
// Use Annotation Add #import "AnnotationView.h" in your relevant .m file:
CLLocationCoordinate2D pCoordinate ;
pCoordinate.latitude = LatValue;
pCoordinate.longitude = LanValue;
// Create Obj Of AnnotationView class
AnnotationView *annotation = [[AnnotationView alloc] initWithCoordinate:pCoordinate addressDictionary:nil] ;
annotation.title = #"I m Here";
annotation.subtitle = #"This is Sub Tiitle";
[self.mapView addAnnotation:annotation];

Answer 2

Test the annotation to see if it's the same class as your custom class:
- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
MKAnnotationView *mkav = nil;
if ([annotation isKindOfClass:[AnnotationForId class]])
{
// This should be safe now.
AnnotationForId *aid = annotation;
// Whatever you wanted to add, including making your own view.
}
return mkav;
}