Objective-C-核心位置-iOS 7.1

Question

I have a code in a UIViewController that starts the location update: [locationManager startUpdatingLocation];

Is working perfectly. But I need every time you exit this screen it stops updating the location and start again when I return.

The first time it for updates. In other times it does not stop.

Code for exit from view:

[locationManager stopUpdatingLocation];
locationManager.delegate = nil;

Ihave tried also: (without success too)

[locationManager stopMonitoringSignificantLocationChanges];
[locationManager stopUpdatingHeading];
[locationManager stopUpdatingLocation];

locationManager.delegate = nil;
locationManager = nil;

It always update. But from the second time not stop update.

didUpdateLocation code:

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{ [self addingMarkerUser]; }

Answer 1

You should put your code in the viewDidAppear and i suppose in your [self addingMarkerUser] you use something like this without the stop (if not, please provide the code) :

CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
    [geocoder reverseGeocodeLocation:_currentLocation completionHandler:^(NSArray *placemarks, NSError *error) {

 if (!(error)) {
              //do something with the data.
              //then stop the update.
            [locationManager stopUpdatingLocation];

        }
    }];

If you do like that, every time your view appear, the location will start the update then stop once the data retrieve.