4D for iOS: Sign and read barcodes from your app

Actions using parameters have been available since 4D  v17 R5, and we’re constantly working to make your apps more and more interactive with enhanced mobile experiences. In 4D v18 R6, new parameter formats are available: Signature and Barcode!

Sign with your fingertip

With the Signature format, you can sign with your fingertip and send signatures directly from your app to the server. It’s a really nice solution to get your customer signatures after a package delivery, for example.

To integrate this feature into your app, just open the Actions section and select the Signature format for an image parameter!


Scan any barcode

The Barcode format allows any value that can be associated with a barcode (EAN13, EAN8, QR Code, etc.) to be extracted by simply scanning it from an Action form. This is a very convenient way to add an item reference by scanning a QR Code directly from your mobile application.



To add it from the project editor, just open the Actions section and select the Barcode format for a text parameter. Your mobile app will do the rest!



One very interesting thing about barcodes is that you can associate any string of characters to it and customize it easily. Many websites can help you to do this (just search for “QR code generator”).

Here’s an entertaining challenge: we have hidden a surprise text in this nice QR Code! Will you find it and share what you uncover with us on the forum?

Clue: the camera app of your phone might be helpful 🙂


Thanks to these two new parameters, you can add value to your apps so they can be more professional than ever before with a great user experience.

Don’t hesitate to give us feedback on the 4D forum and check out the documentation for more details. See you there!


David Azancot
• 4D for iOS Product Owner •David Azancot joined the 4D Product team as a Product Owner in 2017. He's in charge of writing the user stories and translating them into functional specifications. His role also includes making sure that feature implementations meet customers' needs.David graduated with an MBA in Marketing, Internet and Mobility from the Leonard De Vinci Institute and began his career in 2011 with a mobile start-up company, later acquired by Madvertise (a mobile marketing group). Passionate about mobile interfaces, he was the natural choice to develop interactive mobile ad formats for the group in 2015. In parallel, David has been developing his own iOS and Android applications since 2012.