Probably you can read this document in following link...
http://developer.apple.com/documentation/Cocoa/Conceptual/Strings/Articles/CreatingStrings.html


This talks about how to C string. And after that you can convert that into a
C++ string object.

On Fri, May 8, 2009 at 9:39 PM, Alexander Spohr <a...@freeport.de> wrote:

>
> Am 07.05.2009 um 23:38 schrieb Andrew Wood:
>
>  mycppstring = std::string([[myNSTextField stringValue] UTF8String]);
>>
>> But it keeps crashing. What's the recommended way?
>>
>
> Does std::string() copy the char* contents? I guess not (but I don’t use
> C++).
>
> See the docs:
> UTF8String
> Returns a null-terminated UTF8 [...]
>
> Discussion
> _The_returned_C_string_is_automatically_freed_ just as a returned object
> would be released; you should copy the C string if it needs to store it
> outside of the autorelease context in which the C string is created.
>
>
> Could that be your problem?
>
>        atze
>
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