title: how to use ios callkit - call directory extension?
body: <p>I use iOS CallKit <code>CXCallDirectoryExtensionContext</code> to get phone number information, but what I want is to support it by phone number. I'm using Objective-C.</p>
  
  <p>How to customize contacts incoming call?</p>
  
  <p>Where is the guide?</p>
  
  <p><a href="https://i.stack.imgur.com/hEuKi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hEuKi.png" alt="enter image description here"></a></p>