How to use tracing in xcode?

Question

Apple Xcode

An important element in programming is tracing.
But how to use it in xCode? Tell me please.

Answer 1

if you mean this - en.wikipedia.org/wiki/%D0%A2%D1%80%D0%B0%D1%81%D1%...
then everything is very simple: click on the line number to the left of the code, there a blue arrow will appear - this is a breakpoint. start the program for execution and finish the program or wait until the program reaches this point. after which the program will stop the execution of the code in the specified place and you will be able to see the values ​​of the variables in the debugger, and on the left is the call stack. there are several buttons above the panel where the current variables are shown:
a button similar to play - continue the program execution (if another breakpoint is encountered on its path, the program will stop again)
a curving arrow above the horizontal stick - go to the next line (the program will execute the line when it does notwill continue execution)
down arrow pointing to the stick - will enter the function / method located on the current line of the executed line of code