http://stackoverflow.com/questions/5714372/how-to-empty-caches-and-clean-all-targets-xcode-4
Clean Build
Reset SimulatorRestart XcodeDelete your DerivedData folder in ~/Library/Developer/Xcode/DerivedDataDelete the contents (not the whole folder) of /var/foldersRestart Computerhttp://stackoverflow.com/questions/28106791/error-itms-90164-90046-invalid-code-signing-entitlements