Detecting network connection

Question

I'm developing an app for IOS which stores data on a web server and thus does not work offline. So I need to detect if connection is available (also required for app approval). I've found some solutions for AIR by googling but they don't seem to be available for IOS.
So how can I detect connection on IOS?
I've set UIRequiresPersistentWiFi in the app's xml to YES but it doesn't do the job, it only detects if airplane mode is on.

Answer 1

The below function is used to check for Internet Connection in Flex for all devices.
You also have to listen to change event of NetworkInfo so that in middle of the application if internet is disconnected then that case is handled.
private function checkInternetConnection():Boolean
            var interfaces:Vector.<NetworkInterface> = NetworkInfo.networkInfo.findInterfaces();
            if(interfaces.length==0)
                return true;
            for(var i:uint = 0; i < interfaces.length; i++)
                if(interfaces[i].name.toLowerCase() == "wifi" && interfaces[i].active)
                    trace("WiFi connection enabled");
                    return true;
                else if(interfaces[i].name.toLowerCase() == "mobile" && interfaces[i].active)
                    trace("Mobile data connection enabled");
                    return true;
            return false;