title: Remove first character from string
body: <p>I have this code: </p>
  
  <pre><code>func barcodeData(_ barcode: String!, type: Int32) {
      referenceField.text = barcode!
  }
  </code></pre>
  
  <p>When I scan a barcode the textfield is replaced by it. It's always an "R" in the beginning of the barcode followed by some digits. </p>
  
  <p>I want the textfield to display only the numbers. So if the barcode scanned is "R454512" I want the textfield to show only "454512" </p>
  
  <p>Could someone explain this to me? I'm pretty new in this barcode-world.
  I don't have any values yet so how am I supposed to use this?</p>
  
  <p>Thanks</p>