Ios 此处地图中未获取当前位置

我正在我的应用程序中使用here地图，效果很好。我将目标坐标从一个视图控制器传递到另一个视图控制器，其中包含贴图及其方法。我试图在第二个视图控制器中获取方法内的当前位置以计算roue，但当前位置始终返回0，0。请建议如何获取方法内的当前位置，在该位置我从第一个视图控制器传递值

视图控制器1:

- (IBAction)btn_navigate:(id)sender
{
    NSLog(@"%@",_POiarray);
    _VC=[[NaviMeVC alloc]init];
    [_VC GetPoi:_POiarray];
    [self.navigationController pushViewController:_VC animated:YES];
} 

-(void)GetPoi:(NSMutableArray *)anArray
{
    //get current location 

    NMAGeoPosition * position=[[NMAGeoPosition alloc]init];
    position = [[NMAPositioningManager sharedPositioningManager] currentPosition];
    _StartCoordinate=[[NMAGeoCoordinates alloc]initWithLatitude:position.coordinates.latitude longitude:position.coordinates.longitude];

    //not working returns nil



    [[NMAMapLoader sharedMapLoader] setDelegate:self];
    _SelectedPOi=[[NSMutableArray alloc]init];
    _SelectedPOi=anArray;
    NSString *lat=[anArray valueForKey:@"latitude"];
    CLLocationDegrees latitu=[lat doubleValue];
    NSString *longi=[anArray valueForKey:@"longitude"];
    CLLocationDegrees longit=[longi doubleValue];
    _DestinationCoordinate=[[NMAGeoCoordinates alloc]initWithLatitude:latitu longitude:longit];
     NSLog(@"%f  %f",_DestinationCoordinate.latitude,_DestinationCoordinate.longitude);
     NSNumber *lati = [NSNumber numberWithDouble:latitu];
     NSNumber *longitu = [NSNumber numberWithDouble:longit];
     NSDictionary *userLocation=@{@"lat":lati,@"long":longitu};

     NMARoutingMode* routingMode = [[NMARoutingMode alloc] initWithRoutingType:NMARoutingTypeShortest
                                                            transportMode:NMATransportModeCar
                                                           routingOptions:0];
     [self CalculateRoute:routingMode];
 }

mapviewcontroller:

- (IBAction)btn_navigate:(id)sender
{
    NSLog(@"%@",_POiarray);
    _VC=[[NaviMeVC alloc]init];
    [_VC GetPoi:_POiarray];
    [self.navigationController pushViewController:_VC animated:YES];
} 

-(void)GetPoi:(NSMutableArray *)anArray
{
    //get current location 

    NMAGeoPosition * position=[[NMAGeoPosition alloc]init];
    position = [[NMAPositioningManager sharedPositioningManager] currentPosition];
    _StartCoordinate=[[NMAGeoCoordinates alloc]initWithLatitude:position.coordinates.latitude longitude:position.coordinates.longitude];

    //not working returns nil



    [[NMAMapLoader sharedMapLoader] setDelegate:self];
    _SelectedPOi=[[NSMutableArray alloc]init];
    _SelectedPOi=anArray;
    NSString *lat=[anArray valueForKey:@"latitude"];
    CLLocationDegrees latitu=[lat doubleValue];
    NSString *longi=[anArray valueForKey:@"longitude"];
    CLLocationDegrees longit=[longi doubleValue];
    _DestinationCoordinate=[[NMAGeoCoordinates alloc]initWithLatitude:latitu longitude:longit];
     NSLog(@"%f  %f",_DestinationCoordinate.latitude,_DestinationCoordinate.longitude);
     NSNumber *lati = [NSNumber numberWithDouble:latitu];
     NSNumber *longitu = [NSNumber numberWithDouble:longit];
     NSDictionary *userLocation=@{@"lat":lati,@"long":longitu};

     NMARoutingMode* routingMode = [[NMARoutingMode alloc] initWithRoutingType:NMARoutingTypeShortest
                                                            transportMode:NMATransportModeCar
                                                           routingOptions:0];
     [self CalculateRoute:routingMode];
 }

---

要开始接收定位更新，您需要调用

nmapocationingmanager startPositioning

，我在示例代码中没有看到这一点。更多详细信息请参见下面的用户指南链接。请阅读该页上的其他说明，看看是否有帮助

要检查的另一件事：您是否已将

nsLocationWhenUsageDescription

添加到项目

Info.plist

文件中，以确保您的应用程序可以从

CLLocationManager

接收用户位置

此外，这可能看起来很明显，但请记住，只有在有位置定位的情况下，您才能收到

currentPosition

的有效值

---

如果您使用的是MKMapView或谷歌地图，现在就可以了。。非常感谢，我还在mapview中添加了标记数组，并希望在didselectobjects方法中检索特定标记的数据。添加标记效果很好，我想在添加标记时向标记添加标记或标识符，以便从添加的数组中检索特定标记的数据。。。请帮忙。。