title: iOS : Embed video in WKWebView stop music in background
body: <p>I have an issue with <code>WKWebView</code> and the inter-app audio.
  Let me explain the situation:</p>
  
  <ul>
  <li>I have an application like spotify which plays music in background</li>
  <li>I have an app which can open a webview (a <code>WKWebView</code>) and play video like youtube or just a sound.</li>
  <li>When the video or sound is playing in the webview the background music is stopped as well</li>
  </ul>
  
  <p>I have already configured my app to be able to mix sounds, in my app, I have also a player and when I start my player the background music is not stopped.
  Very weird compartment because if I use <code>UIWebView</code>, the background music is not stopped when the embed video is starting in the webview.</p>
  
  <p>Why there is a difference between <code>UIWebView</code> and <code>WKWebView</code>? Have you ever had this issue? Is there a fix for this issue?</p>