CLLocation Variable not sending KVO - NSKeyValueObservingOptionNew - ios

Question

I am working on a simple application that gathers a users current data in a location model. That is working and I can log the locations. However, no viewControllers are seeing the updated variable. I am using KVO in the viewControllers to fire but it seems that CLLocation does not send using 'NSKeyValueObservingOptionNew'. It will fire if I use the 'NSKeyValueObservingOptionInitial' but this fires before the CLLocationManager has had an opportunity to set the instance.
Does anyone know why CLLocation is not sending the "...New" value? Like I said, it is working only when it is set to the "...Initial" state.
Thoughts?
View Controller Code:
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if ([keyPath isEqual:#"locationUpdated"]) {
CLLocation *locationVariable = [[CLLocation alloc]init];
locationVariable = self.location.currentLocation;
NSLog(#"the location vaiable: %#", locationVariable);
self.theMap.centerCoordinate = self.location.currentLocation.coordinate;
}
}
Location Model Code:
- (void)startLocationManger {
if ([self locationManager] == nil) self.locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
_locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[_locationManager startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
CLLocation *locationFix = [locations lastObject];
_currentLocation = locationFix;
NSLog(#"Current Location: %#", _currentLocation);
}

Answer 1

The main reason the KVO notification is not firing from the Location Model code is probably this line in the locationManager:didUpdateLocations delegate method:
_currentLocation = locationFix;
The code is assigning a value directly to the backing variable of the property you want to observe.
Automatic KVO notifications only fire if you use the synthesized property setter:
self.currentLocation = locationFix; // <-- assign using self.xxx
A bit unrelated but in the observeValueForKeyPath method:
I'm not sure why you're checking if ([keyPath isEqual:#"locationUpdated"]). Are you sure that's the keyPath you want to look for?
In this code:
CLLocation *locationVariable = [[CLLocation alloc]init];
locationVariable = self.location.currentLocation;
the alloc+init is unnecessary since the variable is then immediately assigned a new value. Just do:
CLLocation *locationVariable = self.location.currentLocation;