在ios Map上显示转换为Geocoder的当前位置？

Question

在地理编码器字符串中显示当前位置的最佳方法是什么!! 而不是“当前位置”;

以下代码仅适用于第一次！如果位置发生变化，那么它将不会更新位置。

    - (MKAnnotationView *) mapView: (MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>) annotation{
if (annotation == mapView.userLocation){


    [self.geocoder reverseGeocodeLocation:self.brokendownMapview.userLocation.location completionHandler:^(NSArray *placemarks, NSError *error) {
          if ((placemarks != nil) && (placemarks.count > 0)) {
              // If the placemark is not nil then we have at least one placemark. Typically there will only be one.
              _placemark = [placemarks objectAtIndex:0];


              // we have received our current location, so enable the "Get Current Address" button
              CLS_LOG(@"What is location %@",_placemark);



              _currentLocation.text = [NSString stringWithFormat:@"%@",_placemark];
              NSString *locationName =[NSString stringWithFormat:@"%@",_placemark.name];
              self.myMapView.userLocation.title =locationName;
                NSString *localityAndPostcode =[NSString stringWithFormat:@"%@,%@",_placemark.locality,_placemark.postalCode];
              self.myMapView.userLocation.subtitle = localityAndPostcode;
          }
          else {
              // Handle the nil case if necessary.
              self.myMapView.userLocation.title =@"Location is unknown";
              self.myMapView.userLocation.subtitle =@"";

          }
      }];


    return nil;
}