title: uiwebview zoom programmatically
body: <p>I want to change the UIWebView zoom level programmatically.</p>
  
  <p>I have tried these but they are not worked for me ;</p>
  
  <pre><code>    UIScrollView *sv = [theWebView.subviews objectAtIndex:0];
   [sv setZoomScale:50 animated:YES];
  </code></pre>
  
  <p>also,</p>
  
  <pre><code>  [theWebView stringByEvaluatingJavaScriptFromString:@"document.body.style.zoom = 5.0;"];
  </code></pre>
  
  <p>Any idea?</p>