title: How to set iPhone lock screen background programmatically?
body: <p>I am interested to develope an app which will show quotes on the lock screen of my iPhone. I want app like following image.</p>
  
  <p><img src="https://i.stack.imgur.com/HeVwb.png" alt="enter image description here"></p>
  
  <p>I am trying to do it but not getting any idea. 
  Please help me so I can start working on it.</p>