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Editorial Team
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Asked: 2026-06-02T04:46:13+00:00

I am building an iPhone app using ZXingWidget. I followed the README instructions and

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I am building an iPhone app using ZXingWidget. I followed the README instructions and got everything setup in my project and it compiled with no problem. I then imported QRCodeReader.h in my view controller header file and started to get the following error on compilation of FormatReader.h:

Lexical or Preprocessor issue ‘zxing/common/Counted.h’ file not found.

I realized I had forgotten to rename my view controller implementation file from .m to .mm so I did that. However, I am still getting the error.

Any suggestions?

EDIT: Here is the directory layout for my “QR Scan” project. You will see that “cpp” is under the “Projects” folder and that “QR Scan.xcodeproj” is in the “QR Scan” folder. I have “../cpp/core/src” in my headers for my QR Scan Xcode project.

 /Projects
      /cpp
           /core
                /src
      /QR Scan
           /QR Scan
           /ZXingWidget
                ZXingWidget.xcodeproj
           QR Scan.xcodeproj
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1 Answer

  1. Editorial Team

    Double check step 5 of the README. You don’t have the C++ header files in your include path.

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