Question

So I have MKAnnotationViews on the map in my app, however, I cannot seem to get the annotation to show a callout. Heres some of the code I’ve tried:

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {

static NSString *identifier = @"Bar";   
if ([annotation isKindOfClass:[BarLocations class]]) {

    MKPinAnnotationView *annotationView = (MKPinAnnotationView *) [self.mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
    if (annotationView == nil) {
        annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
    } else {
        annotationView.annotation = annotation;
    }

    annotationView.enabled = YES;
    annotationView.canShowCallout = YES;
    annotationView.animatesDrop = YES;

//Doesn't work
    UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    button.frame = CGRectMake(0, 0, 23, 23);
    annotationView.rightCalloutAccessoryView = button;

//Doesn't work
    UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
    [leftButton setTitle:annotation.title forState:UIControlStateNormal];
    [annotationView setLeftCalloutAccessoryView:leftButton];
    annotationView.canShowCallout = YES;

//Doesn't work

    UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    rightButton.frame = CGRectMake(0, 0, 15, 15);
    [rightButton addTarget:self
                    action:@selector(showDetails:)
          forControlEvents:UIControlEventTouchUpInside];
    annotationView.rightCalloutAccessoryView = rightButton;


return annotationView; 
}

Note – I tried each of those separately – I just put them together in this post to show options I’ve already tried.

What am I doing wrong?

Edit

I think I figured out a big part of the problem: The following method is never called:

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation

However, I thought MkMapView‘s are like UITableView‘s. So how do I call it. Did I forget to assign a delegate?

Any help would be appreciated

Answer 1

So the problem turns out to be I forgot to link the mapView's delegate to the class where its implemented. So even though the methods were there, and correct, the delegate methods were never called. Once I connected the delegate, it worked perfectly.