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Missing file of QCARUnityPlayer in xcode

I am working on Vuforia sdk sample project, i did some work in unity using Vuforia sdk and i convert this project into xcode and it did work, but when i send this code to my other computer it give me an errorĀ "Missing file of QCARUnityPlayer" on line of "#include "QCARUnityPlayer.h", i hope this file is include in vuforia sdk, i don't know where i did wrong and because it not gives me any framework missing error generate and also i rechecked this every thing is ok. Please help me why this happen this will be great help for me. Thanks in advance.