pod 'Firebase/Core'
pod 'Firebase/MLVision'
pod 'Firebase/MLVisionBarcodeModel'

import Firebase

let format = VisionBarcodeFormat.all
let barcodeOptions = VisionBarcodeDetectorOptions(formats: format)

var vision = Vision.vision()
let barcodeDetector = vision.barcodeDetector(options: barcodeOptions)

let visionImage = VisionImage(image: imageView.image!)

barcodeDetector.detect(in: visionImage) { features, error in
    guard error == nil, let features = features, !features.isEmpty else {
        print("No barcodes")
        return
    }
    
    for barcode in features {
        let displayValue = barcode.displayValue
        let rawValue = barcode.rawValue
        print("Barcode: \(displayValue) \(rawValue)")
        self.label.text = rawValue
    }
}