On 20 Dec 2008, at 8:05 pm, Andrew Farmer wrote:

However, I think you've overengineering things here. The standard runtime introspection methods, like [NSObject class] and [NSObject isKindOfClass:], should be more than enough to implement this sort of functionality.


You might be right about the overengineering, but -class and - isKindOfClass: can't be used on methods, only on objects you already have. If you have an object that has a property setter, e.g.

- (void)    setColor:(NSColor*) aColor;

and you have a variable selector that can refer to that (but also potentially many other) methods, and an object that might, or might not, be an NSColor*, how do you make sure you don't end up sending that method a string?

KVV works pretty well for this - it also solves another related situation where I can usefully convert objects to other types in some cases - but what I still haven't quite worked out yet is how to *prevent* the situation arising in the first place, in other words, given a list of methods, and an object class, how to filter out those methods/properties from a list that can't accept the object.

--Graham


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