Question about exercise 16-4. Do it dinamically?

[leolobato]

Hi,

On the 16-4 exercise we are asked to display all the information returned by NSProcessInfo getter methods.

Is there a way to do that in a loop?
I mean, if I had a list of all the selectors, I could just invoke the methods using performSelector: and NSLog the result.

I searched for a way to get all the selectors available on a NSObject but couldn't find it.

Thanks in advance!

[skochan]

Although I've never done it, I imagine you can get access to a class' dispatch table (identified by the object's isa variable) and run through and invoke the methods in that table.  The inherited methods are stored in the superclass' dispatch table, so you'd have to address that.  You'd also have to know the arguments and return type of each method, and the ability to distinguish class from instance methods and setters from getters. 

This is advanced stuff well beyond the scope of this book!   

Cheers,

Steve