title: How to add watermarks on an image in iphone
body: <p>I want to add watermarks on an <code>UIImage</code>.</p>
  
  <p>For that i have googled and also studied questions on this website like <a href="https://stackoverflow.com/questions/4068035/how-to-add-watermark-on-a-exist-image">this</a>
  But did not get any help.</p>