+(BOOL)connectedToNetwork{

    struct sockaddr_in zeroAddress;

    bzero(&zeroAddress;, sizeof(zeroAddress));

    zeroAddress.sin_len = sizeof(zeroAddress);

    zeroAddress.sin_family = AF_INET;

     

    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress;);

    SCNetworkReachabilityFlags flags;

     

    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags;);

    CFRelease(defaultRouteReachability);

     

    if (!didRetrieveFlags)

    {

        NSLog(@"Error. Could not recover network reachability flags");

        return NO;

    }

     

    BOOL isReachable = flags & kSCNetworkFlagsReachable;

    BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;

    return (isReachable && !needsConnection) ? YES : NO;