Callback methods from C to Objective-C

Question

I have an Objective-C class. What I am doing is I am calling C functions in my objective-C class [ This C functions I implemented in one file , which is part in this sample ios

Answer 1

I ran into this problem aswell. I assume you are using PJSIP for your VoIP app.

What you want to do is create a pointer to the Objective-C class you'd like to send messages to. You already figured you cannot call Objective-C functions from your C callback.

static YourObjCClass *objCClassPtr

@property (nonatomic, retain) YourObjCClass *class

When initializing said class, have the static pointer point to the Objective C object's pointer. (pointer to pointer to object)

objCClassPtr = class;

You are now able to send messages to the Objective-C object using [objCClassPtr message] from your C function as if you would write [class message]

You can point to self the same way.