didUpdateToLocation not called - objective-c

Question

I have a very complicated problem with geolocation : the didupdatetolocation delegate method is not called which I'm not understand.
this the code of the method:
- (void) locationManager:(CLLocationManager *)pLocationManager didUpdateToLocation:(CLLocation *)pNewLocation fromLocation:(CLLocation *)pOldLocation {
lGPSAccuracy = 0;
// Stop trace record when the GPS Signal is poor or null
if (pNewLocation.horizontalAccuracy > GPS_POOR_SIGNAL || pNewLocation.horizontalAccuracy < 0){ return;}
if (pNewLocation.horizontalAccuracy > pNewLocation.verticalAccuracy) {
lGPSAccuracy = pNewLocation.horizontalAccuracy;
} else {
lGPSAccuracy = pNewLocation.verticalAccuracy;
}
if (self.delegate && [self.delegate respondsToSelector:#selector(traceRecorder:didUpdateToLocation:fromLocation:)]) {
[self.delegate traceRecorder:self didUpdateToLocation:pNewLocation fromLocation:pOldLocation];
}
CLLocationCoordinate2D lUserLocation = pNewLocation.coordinate;
Boolean lLatitudeOK = (self.mMapSouthWest.latitude < lUserLocation.latitude) && (lUserLocation.latitude < self.mMapNorthEast.latitude);
Boolean lLongitudeOK = (self.mMapSouthWest.longitude < lUserLocation.longitude) && (lUserLocation.longitude < self.mMapNorthEast.longitude);
//IF USER IS OUT OF THE MAP
if (self.delegate && [self.delegate respondsToSelector:#selector(userPositionOnMap:)]) {
if ( (!lLatitudeOK || !lLongitudeOK) ) {
[self.delegate userPositionOnMap:NO];
} else {
[self.delegate userPositionOnMap:YES];
}
}
if (![self isNewLocation:pNewLocation acceptableComparedToOldLocation:pOldLocation]) {
return;
}
[self treatLocation:pNewLocation];
}
when I read about this problem i found that this method is deprecated but it's still working on a old version of my project which is very abnormal.
Any help please.

Answer 1

Make sure your CLLocationManager variable isn't a local variable. And call startUpdatingLocation after creating CLLocationManager. One of these 2 mistake can make didUpdateToLocation isn't called.
Try my code below
- (void) beginMonitoring {
if (TracageAutomatic) {
tracageAutomaticTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(tracageAutomaticTimeCalled) userInfo:nil repeats:YES];
}
if (self.mLocationManager == nil) {
[self setMLocationManager: [[CLLocationManager alloc] init]];
[self.mLocationManager setDelegate:self];
[self.mLocationManager setDesiredAccuracy:kCLLocationAccuracyBestForNavigation];
[self.mLocationManager setDistanceFilter:2.0f]; //Minimum distance to move in meters before calling location update.
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(#"8.0")) {
//TODO: restore for iOS8
[self.mLocationManager requestWhenInUseAuthorization];
}
}
[self.mLocationManager startUpdatingLocation];
if ([self.mLocationManager respondsToSelector:#selector(setAllowsBackgroundLocationUpdates:)]) {
[self.mLocationManager setAllowsBackgroundLocationUpdates:YES];
}
}

Answer 2

yes I'm sure that i did this in the code of this method which is called in running perfectly
- (void) beginMonitoring {
if (TracageAutomatic) {
tracageAutomaticTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:#selector(tracageAutomaticTimeCalled) userInfo:nil repeats:YES];
} else {
if (self.mLocationManager == nil) {
[self setMLocationManager: [[CLLocationManager alloc] init]];
[self.mLocationManager setDelegate:self];
[self.mLocationManager setDesiredAccuracy:kCLLocationAccuracyBestForNavigation];
[self.mLocationManager setDistanceFilter:2.0f]; //Minimum distance to move in meters before calling location update.
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(#"8.0")) {
//TODO: restore for iOS8
[self.mLocationManager requestWhenInUseAuthorization];
}
}
[self.mLocationManager startUpdatingLocation];
if ([self.mLocationManager respondsToSelector:#selector(setAllowsBackgroundLocationUpdates:)]) {
[self.mLocationManager setAllowsBackgroundLocationUpdates:YES];
}
}
}

Answer 3

this the method to launch an automatic hike :
- (void) tracageAutomaticTimeCalled{
if (_mUserReachedTrackEnd){
[tracageAutomaticTimer invalidate];
tracageAutomaticTimer = nil;
}
[self treatLocation:[self.mTrackPoints objectAtIndex:tracageAutomaticCurrentIndex]];
tracageAutomaticCurrentIndex += TracageAutomoticPas;
if (tracageAutomaticCurrentIndex > [self.mTrackPoints count]){
tracageAutomaticCurrentIndex = (int)([self.mTrackPoints count]-1);
}
}

Answer 4

thank you #truncdug. I resolved the problem by changing the deprecated didtoupdatelocations method
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
{
if ([locations count]>0) {
CLLocation *pNewLocation = [locations firstObject];
CLLocation *pOldLocation = _currentLocation;
_currentLocation = pNewLocation;
lGPSAccuracy = 0;
// Stop trace record when the GPS Signal is poor or null
if (pNewLocation.horizontalAccuracy > GPS_POOR_SIGNAL || pNewLocation.horizontalAccuracy < 0){ return;}
if (pNewLocation.horizontalAccuracy > pNewLocation.verticalAccuracy) {
lGPSAccuracy = pNewLocation.horizontalAccuracy;
} else {
lGPSAccuracy = pNewLocation.verticalAccuracy;
}
if (self.delegate && [self.delegate respondsToSelector:#selector(traceRecorder:didUpdateToLocation:fromLocation:)]) {
[self.delegate traceRecorder:self didUpdateToLocation:pNewLocation fromLocation:pOldLocation];
}
CLLocationCoordinate2D lUserLocation = pNewLocation.coordinate;
Boolean lLatitudeOK = (self.mMapSouthWest.latitude < lUserLocation.latitude) && (lUserLocation.latitude < self.mMapNorthEast.latitude);
Boolean lLongitudeOK = (self.mMapSouthWest.longitude < lUserLocation.longitude) && (lUserLocation.longitude < self.mMapNorthEast.longitude);
//IF USER IS OUT OF THE MAP
if (self.delegate && [self.delegate respondsToSelector:#selector(userPositionOnMap:)]) {
if ( (!lLatitudeOK || !lLongitudeOK) ) {
[self.delegate userPositionOnMap:NO];
} else {
[self.delegate userPositionOnMap:YES];
}
}
if (![self isNewLocation:pNewLocation acceptableComparedToOldLocation:pOldLocation]) {
return;
}
[self treatLocation:pNewLocation];
}
}