title: iPhone: how to download media files and save them on device
body: <p>I am new in the iOs world and I need help to implement small feature in my application.</p>
  
  <p>My question is how to download media files (i.e. mp4) and save them on the device for later use? off course the place that the files will be saved should be accessible from my app only (something similar to Context.getCacheDir() in Android).</p>
  
  <p>thanks
  -Z</p>