CLGeocoder reverseGeocodeLocation results when no Internet connection is available

Question

I am seeing odd results when trying to reverse geocode a location if the network is not available:

seen on iOS 5.0.1

Airplane mode ON

[geocoder reverseGeocodeLocation:whatever completionHandler:^(NSArray *placemarks, NSError *error) {
if (error) 
{
     // Alert(@"No Internet connection")!;

     // I should get a kCLErrorNetwork, but I get a kCLErrorGeocodeFoundPartialResult
     // with a placemark array containing a CLPlacemark *
     // with only a latitude and longitude (the ones I entered)...
}
else
{
     // ...
}

This is not documented; at least I couldn't find it.

It is not a big issue per se, since I can't expect it to properly reverse geocode an address without network, but it prevents me from displaying an informative message to the user.

I tried on iOS 5.1.1 and iOS 6.2.1 and get `kCLErrorNetwork`, so they obviously fixed/changed it. — Rob, Feb 26 '13 at 15:32

score 1 · Accepted Answer · edited May 23 '17 at 11:43

That's an iOS 5.0.x behavior. In 5.1 and later, it turns kCLErrorNetwork as you would have expected. If you use the macros from https://stackoverflow.com/a/5337804/1271826 you could theoretically do something like:

[geocoder reverseGeocodeLocation:whatever completionHandler:^(NSArray *placemarks, NSError *error) {

    if (error) 
    {
         if (error.code == kCLErrorNetwork || (error.code == kCLErrorGeocodeFoundPartialResult && SYSTEM_VERSION_LESS_THAN(@"5.1")))
         {
             Alert(@"No Internet connection!");
         }
    }
    else
    {
         // ...
    }
}];

That way, you'll handle the network error regardless of what iOS version the user is running (though, obviously, only 5.0 and later, given that CLGeocoder was introduced in iOS 5.0).

CLGeocoder reverseGeocodeLocation results when no Internet connection is available

1 Answers1