Core Location does't update the significant location changes

Question

In my app(Deployment Target 5.1), i am using CoreLocation to setup a reminder feature, it will basically search the nearby items(have location attached) as device update its current location.

This feature is not working very stable at this stage, sometimes it just doesn't works at all regardless of whether device is in active, suspended and terminated states. i realized that the delegate method locationManager:didUpdateToLocation:fromLocation: didn't get call.

Is there anybody can point me a direction to make this thing work properly?

Here is my setup for the CLLocationManager

sharedLocationManager = [[CLLocationManager alloc]init];
[ESLocationManager defaultManager].delegate = someDelegateClassInstance;
[[ESLocationManager defaultManager] setDesiredAccuracy:kCLLocationAccuracyHundredMeters];
[[ESLocationManager defaultManager] startMonitoringSignificantLocationChanges];

And the implementation of the delegate callback

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {

    // If it's a relatively recent event, turn off updates to save power
    NSDate* eventDate = newLocation.timestamp;
    NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
    if (abs(howRecent) < 20.0) {
        // If the event is recent,find nearby items.
        NSLog(@"latitude %+.6f, longitude %+.6f\n",
              newLocation.coordinate.latitude,
              newLocation.coordinate.longitude);

        //reload nearby list
        NSArray *nearbyItems = [self nearbyItemsForLocation:newLocation];
        if (nearbyItems && nearbyItems.count ) {
            UIApplicationState appState = [[UIApplication sharedApplication] applicationState];
            if (appState != UIApplicationStateActive) {
                [[UIApplication sharedApplication] presentLocalNotificationNow:[self localNotificationForItems:nearbyItems]];
            }
        }
    }

}

Answer 1

Similar reason to this forum with region monitoring

https://devforums.apple.com/message/251046#251046

Hope this helps