CKGridBasedAlgorithm *algorithm = [CKGridBasedAlgorithm new];
self.mapView.clusterManager.algorithm = algorithm;
self.mapView.dataSource = self;
self.mapView.clusterManager.annotations = annotations;

let algorithm = CKNonHierarchicalDistanceBasedAlgorithm()
mapView.clusterManager.algorithm = algorithm
mapView.clusterManager.annotations = annotations

- (void)mapView:(MGLMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
    [mapView.clusterManager updateClustersIfNeeded];
}
- (void)mapView:(MGLMapView *)mapView didSelectAnnotation:(nonnull id<MGLAnnotation>)annotation {
    CKCluster *cluster = (CKCluster *)annotation;
    
    if (cluster.count > 1) {
        UIEdgeInsets edgePadding = UIEdgeInsetsMake(40, 20, 44, 20);
        MGLMapCamera *camera = [mapView cameraThatFitsCluster:cluster edgePadding:edgePadding];
        [mapView setCamera:camera animated:YES];
    }
}