title: iOS Background downloads when the app is not active
body: <p>When my app is initially downloaded, the user needs to download a large file something like 200MB (upper limit). I definitely can't expect the user to keep the app open till this file is downloaded. So he/she might close the app &amp; the app will go into background. </p>
  
  <p>How can I continue to download the file in this scenario? Is this even possible in iOS?</p>