iPhone - Initial user location with CCLocationManager - iphone

Question

I'm using that code running on an iPhone 4 :
- (id)init
{
self = [super initWithNibName:#"OfflineView" bundle:nil]; // ok, not perfect but for test, that works fine
if (self) {
self.locationMgr = [[CLLocationManager alloc] init];
self.locationMgr.desiredAccuracy = kCLLocationAccuracyThreeKilometers;
self.locationMgr.distanceFilter = kCLDistanceFilterNone;
self.locationMgr.headingFilter = kCLHeadingFilterNone;
self.locationMgr.delegate = self;
}
return self;
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
// do things
}
// triggered when showing the view, first call here after the init
- (void) start
{
self.view.hidden = NO;
[self.locationMgr startUpdatingLocation];
[self.locationMgr startUpdatingHeading];
}
but the delegate method is not triggered.
It's only triggered when the phone moves.
How may I init my process with a valid user location when the view appears, without asking my user to shake it phone and make a 100m run, before being able to do something ?

Answer 1

You could "prime" it by kicking the delegate method yourself once.
- (void) start
{
self.view.hidden = NO;
[self.locationMgr startUpdatingLocation];
[self.locationMgr startUpdatingHeading];
[self locationManager: self.locationMgr didUpdateToLocation: [self.locationMgr currentLocation] fromLocation: nil];
}

Answer 2

where do you call start:? you should be getting first fix without moving. It's an asynchronous call back so might take time.
Ideally you should be calling startUpdateLocation in the init/viewDidLoad and then read it in locationUpdate:
- (void)locationUpdate:(CLLocation *)location {
// Read location
}