Singleton LocationManager starting updates? - iphone

Question

Why is this CLLocationManager inside my singleton not working? I took this code http://jinru.wordpress.com/2010/08/15/singletons-in-objective-c-an-example-of-cllocationmanager/
Not altertering his code at all (so if I should add something to his code let me know) its my first singleton ever.
- (CLLocationManager *)locationManager {
if (locationManager != nil) {
return [LocationController sharedInstance].locationManager;
}
self.locationManager = [LocationController sharedInstance];
[LocationController sharedInstance].locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
return [LocationController sharedInstance].locationManager;
}
(void)viewDidLoad
{
[super viewDidLoad];
// Start the location manager.
[LocationController sharedInstance].delegate = self;
//[[self locationManager] startUpdatingLocation];
[[LocationController sharedInstance].locationManager startUpdatingLocation];

Answer 1

I don't quite understand what you want to achieve in your - (CLLocationManager *)locationManager method here. But in the init function in LocationController.h, you should add something like this:
- (id)init
{
self = [super init];
if (self != nil) {
self.locationManager = [[[CLLocationManager alloc] init] autorelease];
self.locationManager.delegate = self;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
}
return self;
}
And when you want to call the singleton object in other controller to update the location, you should be able to just call:
[[LocationController sharedInstance].locationManager startUpdatingLocation];
Remember to also implement the delegate method - (void)locationUpdate:(CLLocation*)location in your controller.
Hope it helps this time if my post didn't.

Answer 2

Perhaps the problem is in the delegate. This points to the file, not the singleton.

Answer 3

Assuming that - (CLLocationManager *)locationManager is a method of LocationController the line
self.locationManager = [LocationController sharedInstance];
makes no sense as you assign the singleton instance of LocationController to self.locationManager which is of type CLLocationManager.

Answer 4

Here is what I did and you can find the complete example on github.
https://github.com/irfanlone/CLLocationManager-Singleton-Swift