A nice way to do this is to have a bridge header file that only declares C
functions. The corresponding .m source code file will have C functions that
natively call Objective-C methods. This same header can be included in .c files
without any trouble, letting them have access to Obj-C code via the bridge's C
functions.
Basically structure your files something like this:
**************** MyBridge.h
extern void DoObjectiveCStuff();
**************** MyBridge.m
#import <Foundation/Foundation.h>
void DoObjectiveCStuff()
{
NSLog(@"Hooray, calling Obj-C methods...");
[NSArray arrayWithCapacity:32];
}
**************** pure.c
#include "MyBridge.h"
void RegularFunction()
{
DoObjectiveCStuff();
}
I hope that helps!
~Martin Wierschin
> On Nov 13, 2020, at 11:16 AM, Carl Hoefs via Cocoa-dev
> <cocoa-dev@lists.apple.com> wrote:
>
> I have built an ObjC/Cocoa/Foundation library.dylib; it works well when
> linked with ObjC apps.
>
> But now I need to link a C program against that library. How do I invoke the
> ObjC library methods from a C program? (I know I can add C function entry
> points to the library, but how do they invoke the internal ObjC library
> methods?)
>
> -Carl
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