How to track the debug value?

Question

Objective-C

There is a similar log, it is clear that some object cannot be nil
But how can you trace the source of the code using the given memory addresses?

Answer 1

What debug? In the picture that you have attached a remnant of the crash log. You need to look at line number 3
(address + 81304)
Next time we are waiting for you with the question "Why does the program crash when I scratch my left heel" we will guess.