QRCodeReader.swift

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  public init(metadataObjectTypes types: [AVMetadataObject.ObjectType], captureDevicePosition: AVCaptureDevice.Position) {
    metadataObjectTypes = types
    previewLayer        = AVCaptureVideoPreviewLayer(session: session) - CRASHED LINE

    super.init()

    sessionQueue.async {
      self.configureDefaultComponents(withCaptureDevicePosition: captureDevicePosition)
    }
  }

I have no device with iOS10. Could someone help?

@yannickl I downloaded iOS 10.0 in Xcode and run it in simulator

@artoymsd but you can't use the camera with the simulator? Have you checked the permissions and the camera availability before?

try QRCodeReader.supportsMetadataObjectTypes()