title: Xcode How read numbers on a Text View (or label?)
body: <p>this is my first post.
  I'm new in the Xcode Word.
  At the moment I'm working to a simple application and I need to read a number from a box and after a lot of calculations write the result in an other text view or label.
  I need how to read a numbers or a string from a box after writing (text view, label or other).
  Thank you very much for your answers</p>