Re: Using C++ classes from Objective C

FROM : John Stiles
DATE : Wed Mar 19 21:22:39 2008

Are you #including the header which declares MyClass?


Jeremy wrote:
> Hi.
>
> I am just starting to learn Cocoa and would like to use standard C++
> classes from my Objective C/C++ classes.
> Is there any known documentation on how to do this, or does anyone
> have any pointers?
>
> I tried creating a new object of my C++ class and calling a method on
> it in a .m file and received a bunch of errors (including new not
> being found).
>
> I then changed my .m file to a .mm file and all of the errors went
> away except for one:
> "cannot find interface declaration for 'MyClass'"
>
> The code in my .mm file is as such:
>
> m_pMemberVariable = new MyClass();
> const unsigned int nRes = m_pMemberVariable->MyFunc();
>
> The second line gets the error. The new allocation in the first line
> seems to compile fine.
>
> Do I need to create some sort of bridge class or method?
>
> Thanks,
> Jeremy
>
> _______________________________________________
>
> Cocoa-dev mailing list (<email_removed>)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
> http://lists.apple.com/mailman/options/cocoa-dev/<email_removed>
>
> This email sent to <email_removed>