On 17 okt 2010, at 15.51, JongAm Park wrote:

> Although I know that NSInvocation was added (from Leopard?), I didn't use it 
> much.


NSInvocation predates Mac OS X...


> Is there any benefit in using it? My guess is that an NSInvocation instance 
> is used repeatedly, but using the "selector" based method is not inconvenient 
> for the most of cases.
> Is there any other benefit in using the NSInvocation?


NSInvocation is a very flexible class, and can be used for a wide variety of 
tasks, but it is also (therefore) more cumbersome to setup and use for the 
simpler things that you mention. It is not often used, so if you don't know 
that you need it, you probably don't.


j o a r


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