Question

正如我从文档中所理解的那样只有来自MKMapView的Real sublussing。是否可以将Realm群集与GoogleMaps一起使用，或者我应该寻找其他一些SDK？

Answer 1

目前ABFRealmMapView旨在与MKMapView配合使用，但可以扩展为使用Google Maps SDK。

实际进行群集的内部组件是：ABFLocationFetchedResultsController。这允许您创建描述地图搜索的ABFLocationFetchRequest，然后它将获取这些对象，无论是否启用了群集。您可以复制班级ABFRealmMapView实际使用ABFLocationFetchedResultsController的方式，并将其移植到Google地图视图的子类中。

导入代码位于refreshMapView方法中，该方法会自动调用（如果已启用autorefresh）以响应要移动的地图：

- (void)refreshMapView
{
    @synchronized(self) {
        [self.mapQueue cancelAllOperations];

        MKCoordinateRegion currentRegion = self.region;

        ABFLocationFetchRequest *fetchRequest =
        [ABFLocationFetchRequest locationFetchRequestWithEntityName:self.entityName
                                                        inRealm:self.realm
                                                latitudeKeyPath:self.latitudeKeyPath
                                               longitudeKeyPath:self.longitudeKeyPath
                                                      forRegion:currentRegion];

        if (self.basePredicate) {
            NSCompoundPredicate *compPred =
            [NSCompoundPredicate andPredicateWithSubpredicates:@[fetchRequest.predicate,self.basePredicate]];

            fetchRequest.predicate = compPred;
        }

        [self.fetchResultsController updateLocationFetchRequest:fetchRequest
                                               titleKeyPath:self.titleKeyPath
                                            subtitleKeyPath:self.subtitleKeyPath];

        typeof(self) __weak weakSelf = self;

        NSBlockOperation *refreshOperation = [[NSBlockOperation alloc] init];

        NSBlockOperation __weak *weakOp = refreshOperation;

        MKMapRect visibleMapRect = self.visibleMapRect;

        ABFZoomLevel currentZoomLevel = ABFZoomLevelForVisibleMapRect(visibleMapRect);

        if (self.clusterAnnotations &&
            currentZoomLevel <= self.maxZoomLevelForClustering) {

            MKZoomScale zoomScale = MKZoomScaleForMapView(self);

            [refreshOperation addExecutionBlock:^{
                if (![weakOp isCancelled]) {
                    [weakSelf.fetchResultsController performClusteringFetchForVisibleMapRect:visibleMapRect
                                                                               zoomScale:zoomScale];

                    [weakSelf addAnnotationsToMapView:weakSelf.fetchResultsController.annotations];

                    [weakSelf registerChangeNotification:weakSelf.autoRefresh];
                }
            }];
        }
        else {
            [refreshOperation addExecutionBlock:^{
                if (![weakOp isCancelled]) {
                    [weakSelf.fetchResultsController performFetch];

                    [weakSelf addAnnotationsToMapView:weakSelf.fetchResultsController.annotations];

                    [weakSelf registerChangeNotification:weakSelf.autoRefresh];
                }
            }];
        }

        [self.mapQueue addOperation:refreshOperation];
    }
}

真正的聚类GMSMapView ios

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