title: Long press gesture on UICollectionViewCell
body: <p>I was wondering how to add a long press gesture recognizer to a (subclass of) UICollectionView. I read in the documentation that it is added by default, but I can't figure out how. </p>
  
  <p>What I want to do is: 
  Long press on a cell ( <a href="https://github.com/min/MNCalendarView">I have a calendar thingy from github</a> ), get which cell is tapped and then do stuff with it. I need to know what cell is longpressed. Sorry for this broad question, but i couldn't find anything better on either google or SO </p>