title: iOS Swift - Add target(selector) to string
body: <p>Is there a way to add a target to a specified word from an UITextView? For example. 
  I want to add a target to a hash-tagged word from a UITextView.
  I'm using a function to get an array with the hash-tagged words from the textview, but I don't know how to add them a target, or a tap-gesture.</p>