title: UIImageView sides and top rounded borders
body: <p>Hi all I need to realize borders around an <code>UIImageView</code> like these. </p>
  
  <p>Left, top and right border like an half-moon</p>
  
  <p><a href="http://imageshack.com/a/img841/3269/o90p.png" rel="nofollow">http://imageshack.com/a/img841/3269/o90p.png</a></p>
  
  <p>How can i do it ?</p>