title: expanding a text view when user clicks on "more..."
body: <p>There are applications with a text field that shows a given amount of lines and when the user clicks more it expands and shows the rest,
  I'm familiar with the code to expand my UITextView but not sure how to add the "more..." and then "less...", </p>
  
  <p>option to <img src="https://i.stack.imgur.com/KjfY2.png" alt="it"></p>
  
  <p><b>Fine tuning the question:</b> I'm not looking to add a button but having the default IOS behavior when the text is larger than the size of a control it will either place ... at the end or in the middle for example: this is ... or thi...long</p>