title: Underline UILabel text
body: <p>I have <code>UILabel</code> whose string is being set at runtime. The text in <code>UILabel</code> is centrally aligned. I want to display an underline below the label text. But the line should have X same where the text begins (consider center alignment) and width equal to text width (not label width). For underline I have created a <code>UIView</code> and have set its background color. But I am not able to fix length of underline as I want.</p>
  
  <p>Below is the code I have used:</p>
  
  <pre><code> UILabel *blabel = [[UILabel alloc] initWithFrame:CGRectMake(XX, 6, 271, 26)];
      blabel.text = [m_BCListArray objectAtIndex:tagcount];
      blabel.textAlignment = UITextAlignmentCenter;
      blabel.backgroundColor = [UIColor clearColor];
      blabel.textColor = [UIColor whiteColor];
      blabel.font = [UIFont systemFontOfSize:14];
      [scrollDemo addSubview:blabel];
  
      //underline code
      CGSize expectedLabelSize = [[m_BCListArray objectAtIndex:tagcount] sizeWithFont:blabel.font constrainedToSize:blabel.frame.size lineBreakMode:UILineBreakModeWordWrap];
      CGRect newFrame = blabel.frame;
      newFrame.size.height = expectedLabelSize.height;
      blabel.frame = CGRectMake(blabel.frame.origin.x, blabel.frame.origin.y, 271, expectedLabelSize.height);
      blabel.numberOfLines = 1;
      //[blabel sizeToFit];
      int width=blabel.bounds.size.width;
      int height=blabel.bounds.size.height;
  
      UIView *viewUnderline=[[UIView alloc] init];
      int len = [[m_BCListArray objectAtIndex:tagcount]length];
      viewUnderline.frame=CGRectMake(XX, 26, len, 1);
      viewUnderline.backgroundColor=[UIColor whiteColor];
      [scrollDemo addSubview:viewUnderline];
      [viewUnderline release];  
  </code></pre>
  
  <p>How can I fix the width of line according to text I get?</p>