title: How to tell with Objective-C if the iPhone is connected to a wifi network?
body: <p>In the context of an Objective-C, iPhone application, I need to be able to tell whether the iPhone is connected to a wifi network, and if possible listen to changes in this state.</p>
  
  <p>Does anyone know how to do this?</p>
  
  <p>thanks,
  gabouy</p>