Need to display a selected annotation with different icon about cchmapclustercontroller HOT 5 CLOSED

If I understand you correctly, you want to change the icon of an annotation view for a visible CCHMapClusterAnnotation when this annotation view is selected. This can be done by changing the image property of the annotation view in mapView:didSelectAnnotationView:. Something similar to

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView   *)view {
    view.image = ... // selected image
}

You can change this back in mapView:didDeselectAnnotationView:.

When you zoom, the clusters will change. So it probably doesn't make sense to keep the previously selected annotation view and perhaps you should unselect it.

from cchmapclustercontroller.

I can't rely on the annotationViews isSelected state because it will be deselected everytime the region changes. Correct me if I'm wrong but I need to keep track of the selected annotation myself.
If there is a way to keep the isSelected state after regionDidChange your solution will probably work very nice.
Edit: I agree that it doesn't make sense to keep the selected annotation if you zoom to much and the annotation gets grouped, but I think it does make sense if you just zoom a little bit.

from cchmapclustercontroller.

How about tracking the currently selected annotation independently from the selected property (based on the example in this project).

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
...
//            clusterAnnotationView.canShowCallout = YES;
...
}

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
    [mapView deselectAnnotation:view.annotation animated:NO];

    ClusterAnnotationView *clusterAnnotationView = (ClusterAnnotationView *)view;
    clusterAnnotationView.blue = YES;
}

This will change the annotation view and you could remember the currently selected annotation in a property.

from cchmapclustercontroller.

Really appreciate the help. Actually I tried that and had problems getting the previous selected annotation back to its ordinary icon. More and more annotations will get blue until region change and all gets updated.
When I think about it, It may not be harder than this:

for (id<MKAnnotation> anno in self.mapView.annotations) {
    if ([anno isKindOfClass:[CCHMapClusterAnnotation class]]) {
        CCHMapClusterAnnotation *clusteredAnnotation = (CCHMapClusterAnnotation *)anno;
        if ([clusteredAnnotation.annotations containsObject:self.previousAnnotation]) {
            MKAnnotationView *clusteredAnnotationView = [self.mapView viewForAnnotation:clusteredAnnotation];
            clusteredAnnotationView.image = [UIImage imageNamed:@"ordinaryIcon"];
        }
    }
}

I can't test the code until tomorrow, but it should work I hope.

from cchmapclustercontroller.

Yep, it worked.
@choefele thanks for pushing me in the right direction!

from cchmapclustercontroller.