Question

I want to add button in annotationView in mapkit in iphone for performing an action on clicking that button. How can i perform action on clicking that button? i also dont able to add button in annotation view using the following code:

- (MKAnnotationView *)viewForAnnotation:(id <MKAnnotation>)annotation {
    MKPinAnnotationView *pinView = nil; 
    if(annotation != mapView.userLocation) 
    {
    static NSString *defaultPinID = @"com.invasivecode.pin";
        pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
        if ( pinView == nil )
            pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];

        pinView.pinColor = MKPinAnnotationColorRed; 
        pinView.canShowCallout = YES;
        pinView.animatesDrop = YES;

        UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        [infoButton addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
        pinView.rightCalloutAccessoryView = infoButton;

    } 
    else {
        [mapView.userLocation setTitle:@"I am here"];
    }
    return pinView;
}

Can anyone please tell me how can i add button to the default userlocation’s blue dot’s annotation view? Thanks in advance.

Answer 1

For adding the button in default blue dot’s annotationView, use the delegate method and add button there in following way:

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {
if (!view.rightCalloutAccessoryView) {

    UIButton *detailButton = [UIButton buttonWithType: UIButtonTypeDetailDisclosure];
    view.rightCalloutAccessoryView = detailButton;

    detailButton.frame = CGRectMake(0, 0, 44, 44);
    detailButton.contentVerticalAlignment = UIControlContentVerticalAlignmentTop;
    detailButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;

 }
}