title: How to center text in UILabel with different fonts
body: <p><img src="https://i.stack.imgur.com/UMFMo.jpg" alt="enter image description here"></p>
  
  <p>I use four fonts in the picture.It seems that different font has different vertical alignment in UILabel.</p>
  
  <p>But I want to <strong>center in vertical or align top</strong> the text with different fonts in UILabel.</p>
  
  <p>The labels is in fixed size.And I should not to change it in my program.</p>
  
  <p>Any one can help me?</p>