title: IOS MVC pattern and data controller for manipulating NSMutableArray
body: <p>I have: <br>
   a class called Care<br>
   an NSMutableArray that is called masterCareList<br>
   masterView, detailView  <br>
   careDataController for adding Cares to List and count number of objects. <br>
    <br>
  I want to count my objects in MasterView and I want to add an object in detailView. In both cases using the careDataController (not rewind segue or passing data between views) and to the same masterCareList. </p>
  
  <p>How do I use the same dataController and therefore the same NSMutable array in the best (MVC) way? </p>