我已经在Swift中使用WeScan git repo做了一个成分扫描应用程序，因为我一次只想扫描一张图片，并在尝试使用原生库时发现了问题。
https://github.com/WeTransfer/WeScan/
一切都是完整的，但我是在一个只有一个后置摄像头的老iPhone上测试。在iPhone 15上测试后，我意识到后置摄像头不是自动对焦的，我看不到在图书馆里在哪里定义使用哪个摄像头（它需要最近的视觉一个扫描小文字）或如何使它自动对焦（例如，就像在原生相机应用程序中，你点击自动对焦，它就会切换到适当的相机）。
我一直在摆弄ImageScannerController和CameraScannerViewController，试图找到一个autoFocus或selectCamera方法，但都无济于事。

func scanFromCamera() {
    let scannerViewController = ImageScannerController()
    scannerViewController.imageScannerDelegate = self
    scannerViewController.modalPresentationStyle = .popover
    scannerViewController.navigationBar.backgroundColor = .black
    scannerViewController.navigationBar.tintColor = .white
    scannerViewController.toolbar.backgroundColor = .black
    present(scannerViewController, animated: true)
    
}

 private func configureOCR() {
    ocrRequest = VNRecognizeTextRequest { (request, error) in
        guard let observations = request.results as? [VNRecognizedTextObservation] else { return }
        
        var ocrText = ""
        for observation in observations {
            guard let topCandidate = observation.topCandidates(1).first else { return }
            
            ocrText += topCandidate.string + "\n"
        }
        
        DispatchQueue.main.async {
            self.scannedIngedients = ocrText;
            self.performSegue(withIdentifier: "ScanResults", sender: self)
        }
    }
    
    ocrRequest.recognitionLevel = .accurate
    ocrRequest.recognitionLanguages = ["en-US", "en-GB", "en-AU"]
    ocrRequest.usesLanguageCorrection = true
}

private func processImage(_ image: UIImage) {
    guard let cgImage = image.cgImage else { return }
    
    let requestHandler = VNImageRequestHandler(cgImage: cgImage, options: [:])
    do {
        try requestHandler.perform([self.ocrRequest])
    } catch {
        print(error)
    }
}

@objc func openCamera(sender: Any) {
    scanFromCamera()
}

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非常感谢