Re: Call Cocoa from C++
Re: Call Cocoa from C++
- Subject: Re: Call Cocoa from C++
- From: "Sean McBride" <email@hidden>
- Date: Thu, 17 Dec 2009 18:00:01 -0500
- Organization: Rogue Research Inc.
On 12/17/09 12:24 PM, Randall Meadows said:
>> 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.
If you are using Cocoa Garbage Collection, be very careful doing this.
IIRC, you loose the automatic 'strongness' and will probably have to add
__strong or CFRetain/CFRelease appropriately.
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada
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