如何使用MKMapVIew iOS显示三维建筑

我想使用MKMapview显示3d建筑，就像谷歌地图一样

显示三维建筑的所需地图视图：

我现在的地图是这样的

我已设置

\u mapView.showsBuildings=YES

代码：

CLLocationCoordinate2D ground = CLLocationCoordinate2DMake(53.58448, -8.93772);
CLLocationCoordinate2D eye = CLLocationCoordinate2DMake(53.58448, -8.93772+.0020);

MKMapCamera *mapCamera = [MKMapCamera cameraLookingAtCenterCoordinate:ground
                                                    fromEyeCoordinate:eye
                                                          eyeAltitude:3300];

_mapView.camera.pitch = 10;
_mapView.showsBuildings  =YES;
_mapView.pitchEnabled = YES;
_mapView.showsPointsOfInterest = YES;
_mapView.zoomEnabled = YES;
_mapView.scrollEnabled = YES;
_mapView.showsUserLocation = NO;
_mapView.camera = mapCamera;