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我在这里的地图中计算了一条路线，并使用该路线开始了转弯导航。离线时一切正常，当我尝试使用计算到达目的地的距离时

double distance = [NMANavigationManager sharedNavigationManager].distanceToDestination;

上述方法返回的值非常高，例如 184467440737095520000。即使对于不同的路由，返回值始终为 184467440737095520000。当我提到导航管理器委托时，我发现此方法将返回以米为单位的值。但是即使这个返回值也太高了我的目的地的距离..请指导我如何正确计算到我的目的地的距离..提前谢谢

-(void)CalculateRoute:(NMARoutingMode *)routingMode
{

routeManager = [NMARouteManager sharedRouteManager];
routeManager.delegate = self;
NSMutableArray* stopList = [NSMutableArray array];
[stopList addObject:_StartCoordinate];
[stopList addObject:_DestinationCoordinate];

NSLog(@"routing from [%.5f,%.5f] to [%.5f,%.5f]", ((NMAGeoCoordinates*)stopList[0]).latitude, ((NMAGeoCoordinates*)stopList[0]).longitude,
      ((NMAGeoCoordinates*)stopList[1]).latitude, ((NMAGeoCoordinates*)stopList[1]).longitude);
NSLog(@"routingMode===>%@",routingMode.description);


[routeManager calculateRouteWithStops:stopList routingMode:routingMode];
 }


-(IBAction)StartNav:(UIButton*)sender
{
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(positionDidUpdate)
                                             name:NMAPositioningManagerDidUpdatePositionNotification

                                           object:[NMAPositioningManager sharedPositioningManager]];
[NMANavigationManager sharedNavigationManager].map = self.mapView;
[NMANavigationManager sharedNavigationManager].delegate = self;
[NMANavigationManager sharedNavigationManager].mapTrackingAutoZoomEnabled = YES;
[NMANavigationManager sharedNavigationManager].mapTrackingEnabled = YES;
[NMANavigationManager sharedNavigationManager].mapTrackingOrientation = NMAMapTrackingOrientationDynamic;
[NMANavigationManager sharedNavigationManager].speedWarningEnabled = YES;
[NMANavigationManager sharedNavigationManager].mapTrackingTilt = NMAMapTrackingTilt2D;
[[NMANavigationManager sharedNavigationManager]startTurnByTurnNavigationWithRoute:_route];
}
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2 回答 2

2

计算距离时出现错误。值184467440737095520000等于NMANavigationManagerInvalidValue常量。

尝试在更新位置时计算距离，因此请在您提到的positionDidUpdate方法中执行此操作：

double distance = [NMANavigationManager sharedNavigationManager].distanceToDestination;

如果您想在调用startTurnByTurnNavigationWithRoute方法后第一次这样做，您应该从路由中获取此类信息：

double distance = _route.length;

顺便说一句，如果你尝试对 timeToArrival 做同样的事情，你也会得到一个很高的价值。

于 2017-12-05T11:12:20.140 回答
-1

distanceToDestination不是一个值double。它是一个unsigned long long价值或NMAUint64价值。

执行以下操作：

unsigned long long distance = [NMANavigationManager sharedNavigationManager].distanceToDestination;

或者

NMAUint64 distance = [NMANavigationManager sharedNavigationManager].distanceToDestination;
于 2016-02-10T08:25:19.443 回答