使用cocoapods 出现Undefined symbols for architecture i386: _OBJC_CLASS_$_XXXXXXX", referenced from: error
if you are using cocoapods make sure your target's build settings contain $(inherited) in the other linker flags section
iOS xCode5 Unsupported compiler 'com.apple.compilers.llvmgcc42' error when compiler set to LLVM 5.0
you should actually select the LLVM compiler under "Compiler Version" instead of trying to set "Valid Architectures"