Is it possible to stop on a breakpoint in an instance of an object?-Collection of common programming errors

I’ve tried creating a breakpoint within a class definition, stopping on the message sent to an object instance, hoping it would then jump to the class code and allow me to walk through line by line and see the values of the local variables.

However, I’m going to venture out and say “no, this should not be possible”, as there could be multiple instances of the class in memory. If someone could give a better explanation, that would be grand.

(As a side note, my alternative is excessive NSLogging of the runtime data.)