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Re: Call Cocoa from C++
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Re: Call Cocoa from C++


  • Subject: Re: Call Cocoa from C++
  • From: Randall Meadows <email@hidden>
  • Date: Thu, 17 Dec 2009 12:24:34 -0700

On Dec 17, 2009, at 12:16 PM, David Blanton wrote:

> The question:
>
> How / Can I store a pointer to an obj-c object in a C++ class and then send messages to the obj-c object from C++?
>
> Somethng like:
>
> class MyClass
> {
> public:
> 	void* objcptr; // ptr to my obj-c object
> 	void CallOBJC(void);
> }
>
> MyClass::CallOBJC()
> {
> 	[objcptr updateText];
> }

Just like that.  Put this into a .mm file, and it'll compile as Objective-C++.  You'll get a compiler warning that objcptr may not respond to updateText, which you can eliminate by casting objcptr to the appropriate class.

I've done this very thing, but from plain ol' C.

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 >Call Cocoa from C++ (From: David Blanton <email@hidden>)

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