I want to get text by reading QR Code image. By the way, in iOS15.0.2, CIDetector featuresInImage returns no data. But in iOS 14.6 it returns data. Please answer what the reason is.
QR Code Image Recognition iOS 15 Bug
If a code once worked in older iOS might generate no data in iOS 15, it's worth sending a bug report to Apple. You should better include the project and the sample image to reproduce the issue. If you want to research what is happening with other developers, please show all the code and share the sample image. By the way, the session 10002 of WWDC21 has nothing to do with your issue. Using the right tag would help getting better responses.