iPhone CLLocationManager updates every 0.5 seconds

Question

For an app that does lots of calculation from the GPS, I need to get the latitude/longitude and speed every 0.5 second to be very accurate and avoid delay.

I am usin

Answer 1

[self.locationManager startUpdatingLocation];
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self     selector:@selector(myTimerFunc) userInfo:nil repeats:YES];

- (void)myTimerFunc
{
    CLLocation location = self.locationManager.location;
    // do work here //
}

 - (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    // do nothing here //
}