title: find the frame or position from the content drawn on the screen
body: <p>I'm new to core graphics in ios. 
  I have a string like </p>
  
  <pre><code>NSString *str = [NSString stringWithString:@"Hi Guys How are you ? Just visit the http://www.apple.com and if not satisfied then go to http://www.google.com and Again if you visit http://www.msn.com"];
  </code></pre>
  
  <p>Now i have drawn above string using </p>
  
  <p>[str drawInRect:CGRectMake(0.0f,40,300,200)
      withFont:[UIFont systemFontOfSize:fontSize]
          lineBreakMode:UILineBreakModeWordWrap
      alignment:UITextAlignmentLeft];</p>
  
  <p>It is drawn on the screen very fine. I wan to find that on which position i have drawn 
  http:// www.apple.com</p>
  
  <p>Basically I need to find the frame at which place <a href="http://www.apple.com" rel="nofollow noreferrer">http://www.apple.com</a> has been drawn?
  Bcoz i need to detect above URL and when user tap on above URL i wan to find that url in the web page.</p>
  
  <p>is it possible?</p>