Cannot find MKAnnotation protocol declaration

Question

The code:

@interface RouteMapAnnotation : NSObject <MKAnnotation> { CLLocationCoordinate2D coordinate; NSString* title; NSString* subtitle; } @property (nonatomic, readonly) CLLocationCoordinate2D coordinate; @property (nonatomic, copy) NSString* title; @property (nonatomic, copy) NSString* subtitle; @end 

Here is a snapshot of the error that I have:

https://skitch.com/kuntul/rws3c/smartrek-routemapannotation.h

What's wrong? I did this on the exact same project, and it works.

Answer 1

Do you remember #import <MapKit/MapKit.h> ?

Answer 2

Have you imported MKAnnotation.h?

Answer 3

You forgot #import <MapKit/MapKit.h> .

There is no other reason why this may occur.

Answer 4

Just insert one line

#import <MapKit / MapKit.h>