Find a function on objective c to write system messages as actionscript trace

I'm starting to learn Objective C and I wonder if there is any similar function to actionscript trace 开发者_运维百科to show messages in a console.

Any suggestion?

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Each called method has implicit self (as object) and _cmd (as SEL) parameters. Hence you can do this in Foo class:

- (void)foo {
    NSLog(@"-[%@ %@] custom log", self, NSStringFromSelector(_cmd));
}

This is off top of my head. And, of course there are various macros defined for such shortcut. The one I'm using is from here.