Building for iOS Missing arm64 architecture

Trying to build a new version of an iOS app that integrates Unity, we have updated from Unity 5.3.1 to 5.3.5 but I’m currently having some XCode compilation issues with Unity functions in the Lib.

If anyone has any idea’s would be greatly appreciated.

“_UnityIsFullScreenPlaying”, referenced from:
PlayMovie(std::__1::basic_string, std::__1::allocator > const&, ColorRGBA32 const&, unsigned int, unsigned int, bool) in libiPhone-lib.a(iPhoneVideo.o)

“_UnityDeviceIsStylusTouchSupported”, referenced from:
____Z22IsStylusTouchSupportedv_block_invoke in libiPhone-lib.a(iPhoneInputImpl.o)

“_UnityOnApplicationWillResignActive”, referenced from:
-[UnityAppController applicationWillResignActive:] in UnityAppController.o

ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Needed to completely replace the class files within the iOS project and not just Native. Also replaced Libraries and and Data.