我可以将我的 c++ class 编译成 static 库 (.a) 以便在我的 iPhone 项目中使用吗？

Question

Due to my image processing class is written in c++ and I want to use it in my iPhone project so, Is it possible to compile this c++ class into static library (.a) and use it in my iPhone project? I also want to know about the command to compile c++ source file into static library (.a) on Mac OS-X and how we call the c++ function that compiled into static library (.a) in Xcode.

Thank you very much.

Answer 1

To make your life easier, you can directly include your C++ source file into your Xcode project. In fact, if you name your Objective-C files with an .mm extension, they will be able to directly use C++ source code (this is actually called Objective C++).

On the other hand, you can make a static library with your processing class and link it to your target, but still, you will need to use Objective C++ (ie, .mm extensions), since you will anyway need to include the C++ header files and use the compiler ABI (binary interface) to link to C++ binary.

Creating a static library from a C++ source code is no different than creating a static library from C or Objective-C code (since making a static library is simply compile+archive).

Look also at this post from SO for more details on the process of creating a universal static library.

Answer 2

Yes, you can.

The only point to notice is that in the link above, the author created an Objective-C class in.m files and headers but in your case you need to import your.cpps and headers.