How to add a Map annotation on MKMapView?

Question

Hey, im trying to add an annotation on my map. How can i do it?

Heres my code:

- (void)abreMapa:(NSString *)endereco {

NSString *urlString = [NSStri         


        

Answer 1

You'll also have to code up an annotation class that adopts the MKAnnotation protocol. e.g.:

@interface MyMapAnnotation : NSObject <MKAnnotation> {
...
}

Answer 2

Since MKAnnotation is a protocol, you'll have to define your own class that implements the protocol. For example,

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

@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

- (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate;

If you have a latitude, longitude for the location you'd like to map:

SPAnnotation *annotation = [[Annotation alloc] initWithCoordinate:CLLocationCoordinate2DMake(latitude, longitude)];
[myMap addAnnotation:annotation];

Answer 3

Try this

Pin *selected = [[Pin alloc] init];

for(i=0; i<[[newxml dataarray] count]; i++)
{
    gapi = [newxml.dataarray objectAtIndex:i]; 
    MKCoordinateRegion region ;  // = { {0.0, 0.0 }, { 0.0, 0.0 } }; 
    region.center. latitude = [gapi.lat floatValue];
    region.center. longitude = [gapi.lng floatValue];

    region.span.longitudeDelta = 0.05f;
    region.span.latitudeDelta = 0.05f;

    [self.mapview setRegion:region animated:YES]; 

    Pin* myAnnotation1=[[Pin alloc] init];

    myAnnotation1.coordinate=region.center;;
    myAnnotation1.title=gapi.name;
    myAnnotation1.itemIndex = i;
    myAnnotation1.subtitle=gapi.address;
    [self.mapview addAnnotation:myAnnotation1];

    if (j == i)
    {  
            selected = myAnnotation1;
    }

    if(k==123)
    {
        [self.mapview selectAnnotation:selected animated:NO]; 
    }

}