title: Set segue identifier programmatically
body: <p>Lets say i have a ViewController with a textField and a button.</p>
  
  <p>I want to use an unwind segue so i could get the information of the textField to my other viewController after i clicked the button.</p>
  
  <p>I want to use the PrepareForSegue method so i could save the text from the textField in a property before i"m "unwiding". </p>
  
  <p>How do i set an identifier to my segue manually? If it was a bar Button item i could use the IB to set the identifier ( to "Save" for example) and then use it. This is not the case, just a regular button.</p>