how can I read barcode from camera

To read barcodes from a camera using Apple's Vision framework, you can utilize the detectBarcodes request. Here's a brief overview of how you can implement this:

1. Create a Barcode Detection Request: Start by creating a VNDetectBarcodesRequest object. This request will be used to detect barcodes in the images captured by the camera.

2. Perform the Request: Use the request on the image frames you receive from the camera. This will produce barcode observations, with each observation corresponding to a detected barcode in the image.

3. Handle Asynchronous API: The new APIs are asynchronous, so you need to use async/await to handle the request. This means you should make your function async and await the results from the perform call.

4. Process Observations: Once you have the barcode observations, you can extract information such as the barcode's payload and its location in the image. The location can be used to highlight the barcode for users.

For a more detailed implementation, you can refer to the session Discover Swift enhancements in the Vision framework (04:09) where barcode detection is discussed.

Additionally, if you are working with visionOS, you can use the enterprise APIs to set up a barcode detection provider, which allows for spatial barcode and QR code scanning. This is covered in the session Introducing enterprise APIs for visionOS (07:54).