Adding action to MKMapView annotation - ios

Question

I have a MKMapView with a bunch of annotations but I can't add an action to them. I was just creating an MKPointAnnotation, but I couldn't add an action to that. Whenever I click the annotation, nothing happens. Here is how I am setting the annotations -
CLLocationCoordinate2D monteVista;
monteVista.latitude = (double) 37.83029;
monteVista.longitude = (double) -121.98827;
MKPointAnnotation *monteVistaPoint = [[MKPointAnnotation alloc] init];
monteVistaPoint.coordinate = monteVista;
monteVistaPoint.title = #"Monte Vista";
CLLocationCoordinate2D sanRamonValley;
sanRamonValley.latitude = (double) 37.82609;
sanRamonValley.longitude = (double) -122.00603;
MKPointAnnotation *sanRamonValleyPoint = [[MKPointAnnotation alloc] init];
sanRamonValleyPoint.coordinate = sanRamonValley;
sanRamonValleyPoint.title = #"San Ramon Valley";
CLLocationCoordinate2D doughertyValley;
doughertyValley.latitude = (double) 37.76845;
doughertyValley.longitude = (double) -121.90342;
MKPointAnnotation *doughertyValleyPoint = [[MKPointAnnotation alloc] init];
doughertyValleyPoint.coordinate = doughertyValley;
doughertyValleyPoint.title = #"Dougherty Valley";
NSArray *points = [[NSArray alloc] initWithObjects: monteVistaPoint, sanRamonValleyPoint, doughertyValleyPoint, nil];
[self.schoolMap addAnnotations:points];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKPinAnnotationView *annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:nil];
annotationView.enabled = YES;
annotationView.canShowCallout = YES;
NSLog(#"Pin Created");
return annotationView;
}
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
MKPointAnnotation *testPoint = [[MKPointAnnotation alloc] init];
testPoint = view.annotation;
self.testText.text = testPoint.title;
NSLog(#"Selected");
}

Answer 1

You need to change viewForAnnotation: method in order customize and then just implement openDetail: action method
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
if (annotation == mapView.userLocation)
{
return nil;
}
static NSString *identifier = #"CustomAnnotation";
MKAnnotationView* annView = nil;
if ([annotation isKindOfClass:[CustomAnnotation class]]) {
annView = (MKAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if (annView == nil) {
annView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
} else {
annView.annotation = annotation;
}
UIImage *image = nil;
image = [UIImage imageNamed:#"pin2"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[annView addSubview:imageView];
[annView setFrame:CGRectMake(0, 0, imageView.frame.size.width, imageView.frame.size.height)];
// [annView setBackgroundColor:[UIColor colorWithRed:1 green:0 blue:0 alpha:0.1]];
UIButton*accessory = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[accessory setTag:[(CustomAnnotation*)annotation tag]];
[accessory addTarget:self action:#selector(openDetail:) forControlEvents:UIControlEventTouchUpInside];
[accessory setFrame:CGRectMake(0, 0, 30, 30)];
[annView setRightCalloutAccessoryView:accessory];
}
[annView setEnabled:YES];
[annView setCanShowCallout:YES];
return annView;
}