title: How can we explicitly call garbage collector in ARC? Also is there a way we can decide when to release memory in ARC?
body: <p>I am an iPhone Developer. I am using ARC in my application. I am allocating objects and once its use is over I assign "nil" to it. Is there anything else I need to do in order to get the memory released? </p>
  
  <p>Also is there a way, we can explicitly call garbage collector in ARC? Also is there a way we can decide when to release memory in ARC?</p>