title: Is it possible to set multiple font attributes using an NSAttributedString
body: <p>I am trying to decrease the size of a portion of my string and am using the below code.  My output is not correct.  I am only seeing my first font attribute being used for the entire string, not the specified range.</p>
  
  <pre><code>    NSMutableAttributedString *attString=[[NSMutableAttributedString alloc] initWithString:title];
      NSInteger _stringLength=[descriptionText length];
      [attString addAttribute:NSFontAttributeName
                        value:[UIFont fontWithName:@"Gotham-Bold" size:20.0]
                        range:NSMakeRange(0, 10)];
      [attString addAttribute:NSFontAttributeName
                        value:[UIFont fontWithName:@"Helvetica-Bold" size:12.0]
                        range:NSMakeRange(11, _stringLength-1)];
      [self.description setAttributedText:attString];
  </code></pre>