title: ARC/MRR - is it a setting or what?
body: <p>Sorry, this is probably a very bad question. Ive just started to learn Obj-C and I dont understand this:</p>
  
  <p>Do I somewhere choose if to use ARC/MRR/... for memorymanagement? is it a setting or does it depend on how i write my code?</p>
  
  <p>Please explain like im 5 :)</p>