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Editorial Team
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Asked: 2026-06-09T01:20:58+00:00

I got iOS app, and when i try to build my project XCode give

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I got iOS app, and when i try to build my project XCode give me this error:

linker command failed with exit code 1 (use -v to see invocation)

What’s happening? How should i solve this problem?

Error:

ld: duplicate symbol _OBJC_CLASS_$_TrackInfo in /Users/Development/Library/Developer/Xcode/DerivedData/turbomusic-ezqahcxcowedlgaylyjxqdieywsn/Build/Intermediates/turbomusic.build/Debug-iphonesimulator/turbomusic.build/Objects-normal/i386/PlayerView.o and /Users/Development/Library/Developer/Xcode/DerivedData/turbomusic-ezqahcxcowedlgaylyjxqdieywsn/Build/Intermediates/turbomusic.build/Debug-iphonesimulator/turbomusic.build/Objects-normal/i386/turbomusicAppDelegate.o for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
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1 Answer

  1. Editorial Team

    turbomusicAppDelegate.m and PlayerView.m both declare a class named TrackInfo. This could be either because you have an actual duplicate of the class in both files (or the header files they include), or you are including the header which includes TrackInfo in both files without using include guards, in this case its probably better to use the #import directive rather than the #include one, because the compiler makes sure that the header is only included once when you use #import.

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