title: No Known Class Method for Selector 'valueWithCGPoint'
body: <p>I imported this PRTween library to my project.</p>
  
  <p>Here are the source codes:</p>
  
  <p><a href="https://github.com/domhofmann/PRTween/blob/master/lib/PRTween.h" rel="nofollow noreferrer">PRTween.h</a></p>
  
  <p><a href="https://github.com/domhofmann/PRTween/blob/master/lib/PRTween.m" rel="nofollow noreferrer">PRTween.m</a></p>
  
  <p>But it cant compile and gives me a lot of error</p>
  
  <p>I really have no idea why is this happening because I have no experience with Objective C before.  </p>
  
  <p><a href="https://i.stack.imgur.com/7pMPP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7pMPP.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/fRSFg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fRSFg.png" alt="enter image description here"></a></p>