c++ - How to add existing cpp codes to an objective-c project? -

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i have class written in c++, declaration , implementation seperated .h , .cpp files. , want invoke in ios objective-c project xcode. changed suffix of *.m file *.mm , compilation ok, failed in linking step.

ld: symbol(s) not found architecture arm64

it seems compiler did not discover *.cpp file of implementation of class. when move implementation it's *.h files, program works codes ugly.

can help？i have tried change suffix of cpp mm, no success.


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