title: Proper way of saving and loading pictures
body: <p>I am making a small app where the user can create a game profile, input some data and a picture that can be taken with the camera. </p>
  
  <p>I save most of that profile data with the help of <code>NSUserDefaults</code>, but a friend discouraged me from saving the profile image in <code>NSUserDefault</code>.</p>
  
  <p>What's the <strong>proper</strong> way to <strong>save and retrieve</strong> images locally in my app?</p>