Does freeze capture stop the scanner? about mtbbarcodescanner

[mikebuss]

I believe you're seeing the code a second time because AVFoundation returns codes as quickly as it can process them in the image stream (and often times this means the same code multiple times). These codes get queued up, and will get reported back through the resultBlock.

freezeCapture() doesn't set the resultBlock to nil, so codes can still be reported if they were queued up. Calling stopScanning() will work, as the resultBlock is set to nil, but tearing down the session requires a little bit of time and might report a duplicate code before it finishes.

If your project needs to scan exactly one code and stop receiving more, you could add a boolean that stops processing received codes after the first one. If that's not an option, you could set the resultBlock of the MTBBarcodeScanner object manually to nil, so no codes will be reported back. You'll just have to remember to give it a valid block if you want to receive codes afterwards.

Hope this helps. I'm going to close this for now, but feel free to comment or shoot me an email.

[shekbagg]

Thanks!