how to call CLLocation delegate only after moving 100m

Question

I am working with CLLocation in my app. What I want to do is if I move a distance of 100m then I want to call a server api but if it is less than 100m or the phone is stationary no server call to be made.

What I am currently doing is

CLLocationManager *locationManager = [[CLLocationManager alloc]init];
locationManager.delegate = self;
_locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
_locationManager.distanceFilter = 1000;
[_locationManager setActivityType:CLActivityTypeAutomotiveNavigation];
[_locationManager setPausesLocationUpdatesAutomatically:YES];

Now in the

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations

I am calling a delegate to call the server api, but the problem is this delegate function didupdatelocations function is called continuously (even if I dont move) thus calling the server api. But I want to call it only when the user has moved say 100m. I am working on simulator.

I am new to this area, can anyone suggest how to do it?

Hope you understand the problem Thanks in advance.

EDIT:

Even after setting desiredDistance to 100m the didupdatelocation is called continuously.

Answer 1

Set the distanceFilter property of the CLLocationManager to 100 meters and you will only get events when that much movement has happened.

Answer 2

You can use the -distanceFilter property on the CLLocationManager while instituting it.

locationManager.distanceFilter = 100;

In this way the delegate callback will be called only if the difference between the previous and the last location is over 100m.
Pay attention that 100m is a really small distance, an location coordinates can easily fluctuate over 100m.
If you want to improve that mechanism you must relate it to the CLLocation object accuracy. In the delegate callback of the manager you can elaborate each coordinate an decide if they should be sent to the server or not. For instance I would use the 100m distance filter only if the accuracy is in the range of 10 meters.