Objective-C issues with Location Manager - ios

Question

I am using Location Manager. Its acting very strange. I have these UILabels in place and I am looking for away to consistently update these UILabels when the coordinates change. This is what I have in place:
#implementation ViewController
{
CLLocationManager *locationManager;
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
locationManager = [[CLLocationManager alloc] init];
[locationManager requestWhenInUseAuthorization];
[locationManager requestAlwaysAuthorization];
currentLocation = nil;
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
}
and then this:
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *) newLocation
fromLocation:(CLLocation *)oldLocation
{
/*if (currentLocation == nil)
currentLocation = newLocation;
if (currentLocation != nil) {
Longitude = [NSString stringWithFormat:#"%.10f", currentLocation.coordinate.longitude];
Latitude = [NSString stringWithFormat:#"%.10f", currentLocation.coordinate.latitude];
LongitudeDouble = currentLocation.coordinate.longitude;
LatitudeDouble = currentLocation.coordinate.latitude;
}*/
currentLocation = newLocation;
Longitude = [NSString stringWithFormat:#"%.10f", currentLocation.coordinate.longitude];
Latitude = [NSString stringWithFormat:#"%.10f", currentLocation.coordinate.latitude];
LongitudeDouble = currentLocation.coordinate.longitude;
LatitudeDouble = currentLocation.coordinate.latitude;
Long.text = [NSString stringWithFormat:#"%.10f", LongitudeDouble];
Lat.text = [NSString stringWithFormat:#"%.10f", LatitudeDouble];
}
My issue is when I run the app is updates the labels sometimes, but after a bit, its stops and when I close the app and reopen it the labels do not update at all.
What Am I doing wrong?

Answer 1

May be you should add this line self.locationManager.distanceFilter = 0.1
And fix your code like this
- (void)viewDidLoad
{
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
[locationManager requestWhenInUseAuthorization];
[locationManager requestAlwaysAuthorization];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.distanceFilter = 0.1
[locationManager startUpdatingLocation];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
currentLocation = nil;
}

Answer 2

Try this
viewDidLoad:
locationManager =[[CLLocationManager alloc] init] ;
locationManager.delegate=self;
locationManager.desiredAccuracy=kCLLocationAccuracyBest;
[locationManager requestWhenInUseAuthorization];
[locationManager requestAlwaysAuthorization];
[locationManager startUpdatingLocation];
Info.plist:
NSLocationAlwaysUsageDescription
NSLocationWhenInUseUsageDescription
Then
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
NSLog(#"failed to update location");
}
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
CLLocation *currentLocation=[locations lastObject];
lat=currentLocation.coordinate.latitude;
lon=currentLocation.coordinate.longitude;
NSString *strLat=[NSString stringWithFormat:#"%f",lat];
NSString *strLon=[NSString stringWithFormat:#"%f",lon];
latitude_1=[[NSMutableString alloc] initWithString:strLat];
longitude_1=[[NSMutableString alloc] initWithString:strLon];
}