Network Connection NSNotification for OSX?

Question

I simply need to have a notification post when a valid IP address is assigned. I have tried polling via SCReachability, but that seems to be inefficient.

Any suggestions? This seems like it should be simple, but I've been struggling for several hours to get anything working.

Answer 1

You don't have to poll with SCNetworkReachability. You register the callback, and the system calls the callback when the network state changes. It's not inefficient.

See Apple's sample code Reachability which shows how to integrate it into an Objective-C app. The code is for iPhone, but I think Reachability.{m,h} should work on OS X.

(See Apple's sample code SimpleReach. It's five years old, but should work.)