Re: Sending message to Objective-C object from C file
Re: Sending message to Objective-C object from C file
- Subject: Re: Sending message to Objective-C object from C file
- From: "Kyle Sluder" <email@hidden>
- Date: Sat, 28 Jul 2007 14:07:43 -0400
You could either recompile the C library as Objective-C (which, being
a strict superset of C, will require no alterations in your source
code), or you can call the Objective-C runtime directly.
Compiling as Objective-C is the easier method. Bring up the info
window on your source files and change their type to Objective-C
source, then use #ifdef guards around your new code (I can't remember
what macro Objective-C defines, something like __OBJ_C__, forgive me).
If for some reason you can't do this, you can make calls into the
Objective-C runtime, as Objective-C is really just syntactic sugar for
a bunch of C functions/structs. The Objective-C documentation has
information about the runtime API.
--Kyle Sluder
On 7/28/07, seyed mehdi nazemi <email@hidden> wrote:
>
>
> Hi everyone,
>
> I am an experienced programmer but quite new in Mac OS programming. I am
> developing a Cocoa application. I have an old C library files which I want
> to reuse in this application. Part of that C library file plays an audio
> file using another Audio library file. I want to replace functionality of
> that Audio library file with QuickTime.
>
> So I have created a Controller Objective-C object that includes
> QTMovieViewer and can use that to play an audio file. Now my question is how
> to send message to that Objective-C object from a C file in my old library.
>
> Thanks in advance
>
> Luca.
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