title: Mach-O Linker Error on Xcode 4.6
body: <p>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:</p>
  
  <p>ld: 17 duplicate symbols for architecture i386
  clang: error: linker command failed with exit code 1 (use -v to see invocation)</p>
  
  <p>Does anyone know how to solve this?</p>
  
  <p>Thanks so much!</p>