Question

I am a new user in the iPhone application. I wanted to show pins in my MKMapView. How can i do it?

Give me some valuable suggestions.

Answer 1

You need to create a delegate that implements the MKAnnotation protocol:

@interface AnnotationDelegate : NSObject <MKAnnotation> {
    CLLocationCoordinate2D coordinate;
}

@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

- (id) initWithCoordinate:(CLLocationCoordinate2D)coord;

@end

@implementation AnnotationDelegate

@synthesize coordinate;

- (id) initWithCoordinate:(CLLocationCoordinate2D)coord
{
    coordinate.latitude = coord.latitude;
    coordinate.longitude = coord.longitude;
    return self;
}

@end

For each of your map points you need to instantiate one of your AnnotionDelegate objects (passing in the coordinates of the point) and add it to the MKMapView:

AnnotationDelegate * annotationDelegate = [[[AnnotationDelegate alloc] initWithCoordinate:coordinate] autorelease];
[self._mapView addAnnotation:annotationDelegate];