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Hang Risk warning from Xcode in CBScanner.swift #66

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Binzinz opened this issue Sep 30, 2022 · 3 comments
Open

Hang Risk warning from Xcode in CBScanner.swift #66

Binzinz opened this issue Sep 30, 2022 · 3 comments

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@Binzinz
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Binzinz commented Sep 30, 2022

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
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hamzasohail commented Oct 14, 2022 •
edited

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
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Binzinz commented Oct 14, 2022

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

nobbes added a commit to nobbes/PayForMe that referenced this issue May 22, 2023
@nobbes
Hopefully fixed: "Publishing changes from background threads"
f5e0282 
Except in CBScanner.swift from third-party barcode scanner, issue is open: heart/CarBode-Barcode-Scanner-For-SwiftUI#66
@amos-yau
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amos-yau commented Jan 1, 2024 •
edited

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

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@hamzasohail @amos-yau @Binzinz