title: Use Core Data For Storage for an existing Iphone project?
body: <p>According to the Apple Core Data Tutorial, in order to use Core Data you have to: </p>
  
  <p><i>In the Options section, select the switch to use Core Data for storage. </i></p>
  
  <p>How do it for an existing project? Do you have to import some files? Can that setting be activated later on?</p>
  
  <p>Thanks</p>