title: How to make your push notification Open a certain view controller?
body: <p>I looked on SO but I wasn't able to find any question that discusses when you receive a push notification how can you then open a specific view controller.
  For example if you are creating an app like WhatsApp and you receive two different push notifications ie messages from two different users how would you direct from the app delegate to the respective viewController?</p>
  
  <p>As far as I know in the userinfo dictionary that the appDelegate gives you you can give an ID to a specific viewController but I don't know how to give any a tribute to a specific view controller so that then you could again direct to that viewController.
  Kindly include a code snippet with your answer</p>
  
  <p>**** Swift or Objective-C answers are both acceptable ****          </p>