Re: Curious NSCopying error in subclass

FROM : Guy English
DATE : Mon Nov 29 20:46:56 2004

You've subclassed NSCell but the method signature you're trying to
implement should be:

- (void) setObjectValue: (id <NSCopying>) theObject;

So the warning you're getting is because you're passing in a object
that isn't guarenteed to implement the NSCopying protocol. Change your
method signature.

Later,
Guy

On Mon, 29 Nov 2004 19:41:50 +0000, Moray Taylor
<<email_removed>> wrote:
> Hi,
>
> I am getting a confusing warning in one of my subclasses, the following
> warning
>
> class `NSObject' does not implement the `NSCopying' protocol
>
> appears for the following bit of code
>
> - (void) setObjectValue:(NSObject *) O {
>      printf("setObjectValue:%p\n",O);
>      [super setObjectValue:O]; //the warning flag is here
> }
>
> I'm not attempting to copy it, so why am I getting this warning?
>
> Cheers
>
> Moray
>
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