title: Access requested URL in webViewDidFinishLoad?
body: <p>I'm very new to iOS development so please be gentle.</p>
  
  <p>I understand that <code>webViewDidFinishLoad</code> will fire for each <code>&lt;iframe&gt;</code> plus the original html page.</p>
  
  <p>I'm trying to find the URL of the request that resulted in that <code>webViewDidFinishLoad</code>. As far as I can tell, I can only access webView.request.mainDocumentURL. </p>
  
  <p>I find this perplexing. Inside the <code>shouldStartLoadWithRequest</code> method, which fires also for each <code>&lt;iframe&gt;</code> and the original html request, you can access the URL in question, be it the iframe or the parent page.</p>
  
  <pre><code>- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
  {
      NSLog(@"Parent page request: %@", request.mainDocumentURL);
      NSLog(@"Actual URL request: %@", [request URL]); // This returns what I want.
      return YES;
  }
  </code></pre>
  
  <p>That first log statement will output the  url.</p>
  
  <p>However, inside <code>webViewDidFinishLoad</code> </p>
  
  <pre><code>- (void)webViewDidFinishLoad:(UIWebView *)webView
  {
      NSURLRequest* request = [webView request];
      NSLog(@"Parent page request: %@", request.mainDocumentURL);
      NSLog(@"Request outputs the parent, not the iframe: %@", [request URL]);
      // how do I access the &lt;iframe&gt; url?
  }
  </code></pre>
  
  <p>Help me StackOverflow. My google-fu is weak and your wisdom is strong.</p>
  
  <p><strong>EDIT:</strong> I should be clear on the goal of this. I want to Do Stuff™ when the load event of the parent page fires, not for iframes. I want this to happen as soon as possible, so I don't want to wait until everything finishes.</p>