Re: Calling a Cocoa library from C
Re: Calling a Cocoa library from C
- Subject: Re: Calling a Cocoa library from C
- From: Greg Parker <email@hidden>
- Date: Fri, 11 Nov 2011 18:13:08 -0800
On Nov 11, 2011, at 5:49 PM, Nathan Sims wrote:
> Newb question. I need to create an OS X Cocoa library that is going to be called from a C program. The C program's interface will be simple, along the lines of:
>
> retval=get_float_data(&float1,&float2);
>
> where get_float_data() is a function that resides in the Cocoa library and invokes Objc code to generate and return two float values to the caller.
>
> I'm unclear on how to architect this. Can a C function invoke Objc methods?
> (OSX 10.6.8, Xcode 3.2.6)
Yes. Implement get_float_data() in an Objective-C file. It will be free to call whatever Objective-C methods it wants.
Several libraries on OS X do exactly this, with an Objective-C implementation behind a C interface.
--
Greg Parker email@hidden Runtime Wrangler
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