Re: Strange Warning in initialize method

FROM : Andrew Farmer
DATE : Wed Aug 23 22:42:23 2006

On 23 Aug 06, at 13:24, Thaddeus Cooper wrote:
> Hi all --
>
> I have a method in my app delegate that is registering two value 
> transformers, the first registration compiles fine, but I get a 
> warning on the second registration that says:
>
>     warning: passing argument 1 of 'setValueTransformer:forName:' from 
> distinct Objective-C type


<snip>

> + (void) initialize {
>     ValuePlusOne        *valuePlusOneTransformer;
>     ColumnNameToIcon    *columnNameToIconTransformer;
>     
>     valuePlusOneTransformer = [[[ValuePlusOne alloc] init] autorelease];
>     [NSValueTransformer setValueTransformer:valuePlusOneTransformer 
> forName:@"valuePlusOne"]; // this works
>     
>     columnNameToIconTransformer = [[[ColumnNameToIcon alloc] init] 
> autorelease];
>     [NSValueTransformer 
> setValueTransformer:columnNameToIconTransformer 
> forName:@"columnNameToIcon"]; // warning here
> }


Are you sure ColumnNameToIcon is a subclass of NSValueTransformer?