title: How to allow the user to pick a photo from his camera roll or photo library?
body: <p>I'm making a little photo editing app for fun. Users must select a photo from their camera roll which will then be imported for modification.</p>
  
  <p>How does this generally work? I have seen many apps allowing this with a standard controller that looks always the same.</p>
  
  <p>Is it also possible to access this library directly or to customize the appearance of that controller?</p>
  
  <p>Where should I start looking?</p>