xcode avfoundation条码扫描器如何返回扫描代码的类型

Question

Xcode 12 / 斯威夫特 5

AV基础

我按照本教程学习条形码扫描仪http://www.wepstech.com/bar-qr-code-ios-with-swift-5/

func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {     
    if let metadataObject = metadataObjects.first {
        guard let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject else { return }
        guard let stringValue = readableObject.stringValue else { return }
        AudioServicesPlaySystemSound(SystemSoundID(kSystemSoundID_Vibrate))
        found(code: stringValue)
        captureSession.stopRunning()
        parent.presentationMode.wrappedValue.dismiss()
    }
}

它返回扫描的值，

但是如何获取条形码 TYPE ;要知道它是否扫描了二维码，code128...

Answer 1

您可以切换您的metadataObject 的type 属性并检查您拥有的属性：

switch metadataObject.type {
case .qr:
      print("qrcode")
 case .code128:
      print("code128")
 default:
      print("other type")
}