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Editorial Team
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Asked: 2026-06-02T00:59:01+00:00

I’m trying to develop an application that can stack FITS images. To read FITS

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I’m trying to develop an application that can “stack” FITS images. To read FITS images I can either use CCFits (a C++ library) or CFITSIO (A C library) – there is no native Objective-C library.

I would prefer to use CCFits as it allows object-oriented design which I’m hoping will allow me to organize the program better. I’ve already tried to use CFITSIO but it gets rather unwieldy after a while (of course, this could be because of my inexperience in developing large applications).

So overall, what’s the best way to approach this? Should I write wrappers for the CFITSIO functions and write my own classes? Is there a way to use C++ classes in Objective-C – the library contains quite a few classes and I know I can use opaque pointers to wrap around the classes, but how would things like class inheritance be preserved? Will I have to subclass a class in Objective-C manually and wrap the subclass there?

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1 Answer

  1. Editorial Team

    You can easily mix C++ and Objective-C using Objective-C++. In XCode just rename your .m files to .mm and it will recognize the files as Objective-C++. Then you can use the C++ classes in your Objective-C code (some restrictions apply, but not many).

    Since Objective-C is an extension to C you can use C libraries in any Objective-C program easily.

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