Hang Risk warning from Xcode in CBScanner.swift

[Binzinz]

Xcode warns on this line:
uiView.session?.startRunning()
-[AVCaptureSession startRunning] should be called from background thread. Calling it on the main thread can lead to UI unresponsiveness

[hamzasohail]

There is explicit guidance by Apple to not call startRunning on the main thread though. See the text in the yellow box:

https://developer.apple.com/documentation/avfoundation/avcapturesession?language=objc

This suggests you shouldn't call it on the main thread.

[Binzinz]

That's why I request a pull of the modification.

[amos-yau]

Sorry I would like to know will this issue be fixed?

This thread would help, just add async background dispatch queue, right?

https://developer.apple.com/forums/thread/722309