title: How to detect when item is changed in a table view?
body: <p>I have this table view where I write some data in different columns. I am adding the data by writing it in text boxes and clicking the "add" button. And I am modifying it by selecting a row in the table view, copying the data into the text boxes, editing it and pressing the "save" button.</p>
  
  <p>The data from the text boxes apart from being sent to the table view is also being used for other calculations in my application.</p>
  
  <p>I would like to be able to modify the data directly on the table view and then send the changed data to do the calculations that I need in another class - in my case.</p>
  
  <p>For now I can modify the data on the table view but how could I send the signal that the data has been modified in the view?</p>
  
  <p>Any ideas?</p>