title: No Internet Connection Handling on UIWebView and NSURLRequest
body: <p>I have an app which is entirely web-based and needs an internet connection to navigate around. Basically a website viewed through a UIWebView.</p>
  
  <p>I need to be able to tell the user that no pages can load if they have no internet connection. Is there a simple way I can do this. Perhaps a check if NSURLRequest failed?</p>
  
  <p>Cheers</p>