Grouping Annotation Pins on the Same Coordinate - ios

Question

i have many annotations on my map, How can i grouping Annotation Pins on the Same Coordinate?, i found this but i down't know how can i use that

Answer 1

I think do you mean use something like a cluster on your map for grouping the pins, isn't it?
I used sometime REVClusterMap:
https://github.com/RVLVR/REVClusterMap
Is very useful to avoid to show many points on the map. With that, you show groups of annotations (the clusters) when you are far on the map, and when you zoom in, the points are appearing.
You only have to define your map like this:
REVClusterMapView *mapView;
mapView = [[REVClusterMapView alloc] initWithFrame:viewBounds];
And when you have to add and define the annotations, it will be like this:
NSMutableArray *pins = [NSMutableArray array];
for(int i=0;i<50;i++) {
...
CLLocationCoordinate2D newCoord = {lat+latDelta, lng+lonDelta};
REVClusterPin *pin = [[REVClusterPin alloc] init];
pin.title = [NSString stringWithFormat:#"Pin %i",i+1];;
pin.subtitle = [NSString stringWithFormat:#"Pin %i subtitle",i+1];
pin.coordinate = newCoord;
[pins addObject:pin];
[pin release];
}
[mapView addAnnotations:pins];
-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation {
...
REVClusterPin *pin = (REVClusterPin *)annotation;
MKAnnotationView *annView;
if( [pin nodeCount] > 0 ) { //cluster
pin.title = #"___";
annView = (REVClusterAnnotationView*)
[mapView dequeueReusableAnnotationViewWithIdentifier:#"cluster"];
if( !annView )
annView = (REVClusterAnnotationView*)
[[REVClusterAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:#"cluster"];
annView.image = [UIImage imageNamed:#"cluster.png"];
[(REVClusterAnnotationView*)annView setClusterText:
[NSString stringWithFormat:#"%i",[pin nodeCount]]];
annView.canShowCallout = NO;
}
else { //show your code for a single annotation
...
}
I hope it will be useful :)

Answer 2

Have your ADClusterMapView? It works really well for us.