Hello fellow Drawboteers
I'm also trying to generate some QR-Codes. And these two posts already helped me get on the right track.

But now I can't figure out how to create a more complex QR-Code for a longer string (with 57x57 grid). I don't understand the relation between string-length and the specified "w, h" variables. Given the example on Apple Developer it should be possible to create more complex codes with QRCodeGenerator...

Any help is appreciated! Thank you.