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Editorial Team
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Asked: 2026-05-22T18:19:47+00:00

Hello I am trying to install json framework. According to installation instructions I have

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Hello
I am trying to install json framework. According to installation instructions I have to copy all the classes from json-framwork/classes in my project! I did that and I am getting this error:

ld: duplicate symbol
_OBJC_METACLASS_$_SBJsonParser in /Users/user/Library/Developer/Xcode/DerivedData/testhttp-eavsbuatbfoagsgbqfnevfpjxxfc/Build/Intermediates/testhttp.build/Debug-iphonesimulator/testhttp.build/Objects-normal/i386/SBJsonParser-4254E5B76E32172.o
and
/Users/user/Library/Developer/Xcode/DerivedData/testhttp-eavsbuatbfoagsgbqfnevfpjxxfc/Build/Intermediates/testhttp.build/Debug-iphonesimulator/testhttp.build/Objects-normal/i386/SBJsonParser-46310C881BFA9776.o
for architecture i386 collect2: ld
returned 1 exit status Command
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/llvm-gcc-4.2
failed with exit code 1

What I am doing wrong here?

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1 Answer

  1. Editorial Team

    Please have a look at:

    iPhone: Duplicate Symbol Error?

    Select the project navigator in the right sidebar. Double click your project(top element).

    Now open the build phases tab. There is a section which is called Compile Sources. Open it an check if there is a duplice entry of the file which the error refers to.

    My Installation of the json-framework

    Just added these files to my project

    enter image description here

    Each .m file is here only once

    enter image description here

    In the class I need JSON parsing I’ll just import:

    #import "JSON.h"
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