title: What happen if I forgot to add Core Data when creates the project in xcode 7+ ,ios 9,with Objective C
body: <p>I have an ios project written in objective C. When I create the project I forgot to add core data (absolutely at that moment I create the project, I didn't have a need of core data and now I want). so is it a matter with Xcodee 7+ and if I add now core data to my project, can I continue with the normal way. Or else do I have to copy &amp; paste files from a project which created with core data. Searching for a better and easy way to do this.</p>
  
  <p>how can I do this.hope your helpful answer with this.</p>