title: How to get post id after successful FB ShareDialog post
body: <p>I am referring "ios 3.5 how to" by Facebook. Here is my code</p>
  
  <pre><code>[FBDialogs presentShareDialogWithParams:params
                          clientState:nil
                              handler:
   ^(FBAppCall *call, NSDictionary *results, NSError *error) {
   if(error) {
       // If there's an error show the relevant message
       [self showAlert:[self checkErrorMessage:error]];
   } else {
       // Check if cancel info is returned and log the event
       if (results[@"completionGesture"] &amp;&amp;
           [results[@"completionGesture"] isEqualToString:@"cancel"]) {
           NSLog(@"User canceled story publishing.");
       } else {
           // If the post went through show a success message
           [self showAlert:[self checkPostId:results]];
       }
   }
  </code></pre>
  
  <p>In results I only get didComplete key with value 1. How can I get post_id?</p>