（完整代码详见 SDKDemo 工程的 MBNaviController.m）
        // 实时导航
        if (naviMapView == nil) { 
        // 地图不存在
        naviMapView=[[MBMapView alloc]initWithFrame:(0,120.0,kMainScreenSizeWidth, kMainScreenSizeHeight - 120.0 - 55.0)];
        [self.view addSubview:naviMapView];
        // 创建车标图层
        MBModelOverlay *car = [[MBModelOverlay alloc] initWithFilePath:@"res/red_car.obj"];
            carHead = MBNaviHeadNorthUp;
        }
        // 初始化导航模块
        MBNaviSession *naviSession = [MBNaviSession sharedInstance];
        naviSession.enableSound = YES;
        naviSession.delegate = self;
        // 路线计算完成的回调函数
        - (void)naviSessionResult:(MBRouteCollection *)routes {
            // 算路完成
            // 得到routes集合，此集合中的routeBases，在发起导航获取数据时需用到
            for (MBOverlay *overlay in naviMapView.overlays) {
                [naviMapView removeOverlay:overlay];
            }
            if (routes.routeBases.count > 0) {
                MBRouteOverlay *routeOverlay = nil;
                for (MBRouteBase *base in routes.routeBases) {
                    routeOverlay = [[MBRouteOverlay alloc] initWithRoute:base.getRouteBase];
                    routeOverlay.clickEnable = YES;
                    [naviMapView addOverlay:routeOverlay];      
                }
            } 
        }
        - (void)naviSessionTracking:(MBNaviSessionData *)sData {
            NSLog(@"当前车的位置：%d,%d",sData.carPos.x,sData.carPos.y);
            NSLog(@"当前车头朝向：%ld",(long)sData.carOri);
            NSLog(@"当前建议比例尺：%ld",(long)sData.suggestedMapScale);
            NSLog(@"是否有下一个转弯：%@，还有%ld米转弯",sData.hasTurn?@"是":@"没有",(long)sData.turnIconDistance);
            NSLog(@"当前转向标ID：%ld",(long)sData.turnIcon);
            NSLog(@"转弯之后的道路名称：%@",sData.nextRoadName);
            NSLog(@"当前所在道路名称：%@",sData.roadName);     
            NSLog(@"\n");
        }