NSLog and printing of an object

I have a class and I want to setup wha开发者_如何学运维t is printed when I call NSLog with that class. For example,

NSLog(@"%@",nonstandardObject);

How do I setup the object so it prints out what I'd want?

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Override the -description method. It takes no parameters and returns an NSString that get's printf'd out.

There's another variant called -debugDescription (returns NSString, no parameters) that's used when po'ing the object from gdb.