isConnectedToNetwork.m

+ (BOOL)isConnectedToNetwork {

	// Recover reachability flags
	SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithName(kCFAllocatorSystemDefault, [@"twitter.com" UTF8String]);
	SCNetworkReachabilityFlags flags;
	
	BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(reachability, &flags);
	CFRelease(reachability);
	
	if (!didRetrieveFlags) {
		NSLog(@"Error. Could not recover network reachability flags.");
		return NO;
	}
	
	BOOL isReachable = flags & kSCNetworkFlagsReachable;
	BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;
	
	return (isReachable && !needsConnection);
}