gistfile1.m

- (CDVPlugin*)initWithWebView:(UIWebView*)theWebView {
    self = (GeofencingPlugin*)[super initWithWebView:(UIWebView*)theWebView];
    if (self) {
        self.locationManager = [[CLLocationManager alloc] init];
        self.locationManager.delegate = self; // Tells the location manager to send updates to this object
    }
    self.locationManager.distanceFilter = kCLLocationAccuracyBest;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;

    [self.locationManager startUpdatingLocation];
    
    // Set a movement threshold for new events.
    locationManager.distanceFilter = 100; // meters
 
    [locationManager startUpdatingLocation];    
    return self;
}

- (void)startSignificantChangeUpdates
{
    locationManager.delegate = self;
    [locationManager startMonitoringSignificantLocationChanges];
}

- (void)locationManager:(CLLocationManager *)manager
      didUpdateLocations:(NSArray *)locations {
    // If it's a relatively recent event, turn off updates to save power.
   CLLocation* location = [locations lastObject];
   NSDate* eventDate = location.timestamp;
   NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
   if (abs(howRecent) < 15.0) {
    entered = NO;
   }
}

- (void)notify {
  if (entered) {
    [self notify:region withStatus:@"entered"];
  }
}

- (void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region {
    entered = YES;
    [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(notify:) userInfo:nil repeats:NO];
}