Mach-O Linker Error on Xcode 4.6

Question

I have an iOS app on Xcode 4.6 and when I recently tried to build and run in the iPhone 6.1 simulator I got a "Mach-O Linker Error." It continued to say:

ld: 17 duplicate symbols for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation)

Does anyone know how to solve this?

Thanks so much!

Answer 1

Just go to "Build Phases" -> "Compile Sources" and look for duplicate of classes.

Answer 2

Check if you have "*.m" files in your #import ! It appears that was my mistake...

Answer 3

1. Quit Xcode
2. Restart the System
3. Select Xcode -> Preferences -> Locations
4. In Locations, you will see 'Derived Data'. Click on the arrow icon right next to the path.
5. This will open a folder containing 'Derived Data', delete it.

6. Clean the Product and Run

   if still not works then

   Build Settings > Enable Bitcode > No