CODEWITHSUNDEEP
iosmapkit
azamsharp
azamsharp

Reputation: 20096

Calculating Distance iOS MapKit Using CLLocation

I am trying to find the distance in miles using the latitude and longitude. I have the following method: 

- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation
{
    if(!newLocation) return; 

    if ((oldLocation.coordinate.latitude != newLocation.coordinate.latitude) &&
        (oldLocation.coordinate.longitude != newLocation.coordinate.longitude))
    {



        CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:oldLocation.coordinate.latitude longitude:oldLocation.coordinate.longitude];
        CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.latitude];

        CLLocationDistance distance = ([loc2 distanceFromLocation:loc1]) * 0.000621371192;

        //distance = distance; 

        NSLog(@"Total Distance %f in miles",distance);
    }

}

For some reason it prints out something like 5678.32 miles. The location is pretty much stationary and not moving at all.

Upvotes: 4

Views: 7899

Answers (2)

bealex
bealex

Reputation: 10014

CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.(!!!!!)latitude longitude:newLocation.coordinate.(!!!!!)latitude];

Upvotes: 5

Zebs
Zebs

Reputation: 5448

You are initializing loc2 with the latitude of the new location for both the longitude and the latitude:

This line:

CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.latitude];

Should say:

CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.longitude];

Hope it helps!

Upvotes: 3

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