title: <b> tag not working in UILabel attributed string
body: <p>I am displaying html string into attributed text if UILabel but few of the tags are not working in UILabel like </p>
  
  <pre><code>lineLabel.numberOfLines=0;
   NSString* html = self.offerArray[0][@"description"];
  NSString * htmlString = [NSString stringWithFormat: @"%@%@&lt;/body&gt;&lt;/html&gt;",kHTMLHeadOffer,html];
  htmlString = [htmlString stringByReplacingPercentEscapesUsingEncoding:NSUnicodeStringEncoding];
  NSMutableAttributedString * attrStr = [[NSMutableAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUTF8StringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
  UIFont *font = [UIFont fontWithName:kFontName size:kOrderFont]; [attrStr addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, [attrStr length])];
  NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init] ;
  [paragraphStyle setAlignment:NSTextAlignmentCenter];
  [attrStr addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [attrStr length])];
  lineLabel.attributedText = attrStr;
  </code></pre>