Saving when app in background received: "Can't endBackgroundTask: no background task exists with identifier 14, or it may have already been ended. Break in UIApplicationEndBackgroundTaskError() to debug."

[davidqq]

The belowcode works fine in foreground. However, when I put the app to background, every time MR_saveToPersistentStoreAndWait is called, the console shows "Can't endBackgroundTask: no background task exists with identifier 14, or it may have already been ended. Break in UIApplicationEndBackgroundTaskError() to debug"

Any ways to avoid it? Thanks a lot.

//CLLocationManagerDelegate

• (void)locationManager:(CLLocationManager)manager didUpdateLocations:(NSArray)locations{ CLLocation * newLocation = [locations objectAtIndex: locations.count-1]; TBLocationEntity * record = [TBLocationEntity MR_createEntity]; record.lat = [NSNumber numberWithDouble:newLocation.coordinate.latitude]; record.lng = [NSNumber numberWithDouble:newLocation.coordinate.longitude]; record.date = [NSDate date]; [[NSManagedObjectContext MR_defaultContext] MR_saveToPersistentStoreAndWait]; }