NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:helpUrlStr]];
NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData:[string dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
ruleTextView.attributedText = attributedString;