title: UIActivityIndicatorView Trouble
body: <p>This is a bit of a silly question but I don't know how to get around it.</p>
  
  <p>I am making an iphone app and I am just trying to display a progress wheel while my UITableView is loading.  I try to test if the view is loading but I get an error:
  'request for member 'loading' is something not a structure or a union'.  So, I'm not sure how I am supposed to test for when I should show the wheel.  maybe I have mistyped something?  I don't know, but I am getting pretty frustrated with this silly problem.  So, any help would be appreciated.  Thanks!</p>
  
  <pre><code>- (void) updateWheel {
  
    //curtable is a uitableView
    //wheel is a uiactivityIndicatorView
  
    if (!curTbl.loading) {       //THE ERROR IS FOR THIS LINE
      [wheel stopAnimating];
    } else {
      [wheel startAnimating];
    }
  
  }
  </code></pre>