Determine if Wi-Fi is enabled on iOS with this one weird trick.

oneweirdtrick.c

struct ifaddrs *interfaces;

if(!getifaddrs(&interfaces)) {
    for( struct ifaddrs *interface = interfaces; interface; interface=interface->ifa_next) {
        BOOL up = (interface->ifa_flags & IFF_UP) == IFF_UP;
        if ( up ) {
            NSLog(
                @"Name : %s, sa_family : %d",
                interface->ifa_name,
                interface->ifa_addr->sa_family
            );
        }
    }
}