What will happen to NSLog statements in production?

Question

When we submit the application with NSLog statements,

What will be the effect of the statements? Will those still executes? If it executes will these logs stored somewhere as application logs / system logs? Can we see those? Is it connected to Apple crash reporting in iTunesConnect?

Please clarify my doubts.

Answer 1

Short answer :-

1. Yes it executes in the production app
2. NSLog just log to the console, i do not think it is stored in somewhere.
3. We can only see in the console.
4. When application crash NSLog does not print in the crash submission reports.

Answer 2

NSLog calls can be left in production code. It will be logged in the system log. Applications which litter the system log are annoying, and is an unprofessional way. So try to use Macros in Logging such that you can remove log code execution in production

#define DEBUG_MODE

#ifdef DEBUG_MODE
    #define DebugLog( s, ... ) NSLog( @"<%p %@:(%d)> %@", self, [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
#else
    #define DebugLog( s, ... ) 
#endif