title: Layer mask to bounds and clips to bounds shows a extra border colour
body: <p>Hi I need to add border colour and border width to a label which have a corner radious the following is my code</p>
  
  <pre><code>_lbl_trans_TKT.clipsToBounds = YES;
  _lbl_trans_TKT.layer.cornerRadius = _lbl_trans_TKT.frame.size.width/2;
  _lbl_trans_TKT.layer.borderWidth = 8.0f;
  _lbl_trans_TKT.layer.borderColor = [UIColor whiteColor].CGColor;
  </code></pre>
  
  <p>The following is my out put
  <a href="https://i.stack.imgur.com/ViqF8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ViqF8.png" alt="enter image description here"></a> </p>
  
  <p>In this after the white border colour I get a little green border which I don't need</p>