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A short note on CLLocation / CLLocationManager

**** DEPRECATED **** Use http://liip.to/ilocator

Well.. I’ve been testing this Locator quite a while now. Today I had my final attempt, to find out, why I always got either a cached location or an extremely inaccurate location.

Today, I went out with my notebook (yes, there where the sun is..) to debug.

The example of apple says, to check the timestamp of the newLocation. (It should be less than 5..). Yeah well, guess what - it is sometimes 0 in a cached location. And somehow it’s sometimes just a bit over 5 and you’ll have to wait forever to get a new location.

- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation
{
    NSDate* eventDate = newLocation.timestamp;
    NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];

    if (howRecent < -0.0 && howRecent > -10.0) {
        [manager stopUpdatingLocation];

        // USE THE FORCE OF THE LOCATION!
    }
}

This one should work. Maybe that location stuff is working in the U.S. but it wasn’t in Switzerland..

P.S.: I had another issue with a pwned iPhone today. NSXMLParser throw me errors back and I didn’t know why.. I still don’t know why, I guess it had to do with the libxml2 update I did. Workaround? Restore, works fine now.

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Filed under: How-To, Tech on July 25, 2008 at 12:41 am by marc.
Tags: cllocation, cllocationmanager, iPhone, objective-c, sdk