Can't get startMonitoringSignificantLocationChanges working in iOS 5 - ios

Question

I have a small issue with the startMonitoringSignificantLocationChanges, it doesn't seem to work. the location icon is shown, but my delegate function is never triggered
I have made a class for it here it is:
header file:
#interface geolocation : NSObject < CLLocationManagerDelegate > {
CLLocationManager *locationManager;
}
- (void) significantChange;
- (void) stopSignificantChange;
- (void) locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation;
- (void) locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error;
#end
m file:
#implementation geolocation
- (void) significantChange
{
if (nil == locationManager)
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
[locationManager startMonitoringSignificantLocationChanges];
}
- (void) stopSignificantChange
{
[locationManager stopMonitoringSignificantLocationChanges];
}
- (void) locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
UIBackgroundTaskIdentifier bgTask = [[UIApplication sharedApplication]
beginBackgroundTaskWithExpirationHandler:^{
[[UIApplication sharedApplication] endBackgroundTask:bgTask];
}];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
UILocalNotification* alarm = [[UILocalNotification alloc] init];
if (alarm)
{
alarm.fireDate = [NSDate dateWithTimeIntervalSinceNow:10];
alarm.timeZone = [NSTimeZone defaultTimeZone];
alarm.repeatInterval = 0;
alarm.alertBody = #"Time to wake up!";
alarm.applicationIconBadgeNumber = 1;
[[UIApplication sharedApplication] scheduleLocalNotification:alarm];
}
[[UIApplication sharedApplication] endBackgroundTask:bgTask];
});
}
- (void) locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
}
- (void) dealloc
{
locationManager.delegate = nil;
locationManager = nil;
}
#end
in AppDelegate I call it:
- (void) applicationDidEnterBackground:(UIApplication *)application
{
[UIApplication sharedApplication].applicationIconBadgeNumber = 1;
[geo significantChange];
return [super applicationDidEnterBackground:application];
}

Answer 1

In my case "significant" means 11 callbacks in more than 60 km. So you might just be at the limit.
Edit: That is driving straight south. If you are just driving round and round it is very reasonable that nothing happens.