Swift : No Matter what I do CIDetector is always nil

Question

i don\'t understand why this code doesn\'t work, the detector is always nil with the CIDetectorTypeQRCode constant, everything work with CIDetectorTypeFace. I Supect a bug f

Answer 1

The code you provided can't have a nil detector because it's not an optional and the compiler would complain about several places in your code if it was.

If features is empty then you know it didn't find a QR code in your image. Try providing a better image or turning down the CIDetectorAccuracy.

If features isn't empty then your cast is failing.

Edit: You can't pass a nil context in the constructor.