Custom NSLog without precompiled header

Question

Since Xcode 6 and the introduction of modules, there is no need for precompiled headers anymore. I have always been using a custom logging method which also logs the file, method and line number it was on. This method was defined in the precompiled header. Where should I define the method now we shouldn't use them anymore, without me having to define it in a bunch of files?

#define YBLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)

You can put the `#define` in any .h file you want, so long as you explicitly include/import the .h into the .m that uses the macro. — Hot Licks, Feb 27 '15 at 21:58
You only have to define it once. But without the PCH mechanism you need to include it in every file that uses the macro. — Hot Licks, Feb 27 '15 at 22:02

Midhun MP · Answer 1 · 2015-02-27T22:01:33.033

2

Your #define have a little mistake.

You are define YBLog(fmt,...) to YBLog itself. You need to write NSLog instead of YBLog in the macro definition.

You need to define it like:

#define YBLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)

EDIT:

If you need to access the same on so many files, you have two option.

Add a pch file by yourself and add the declaration in it (I'm doing the same)
Define it in a header file and include it anywhere you want

edited Feb 27 '15 at 22:01

answered Feb 27 '15 at 21:53

Midhun MP

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Silly me. Thanks for that, but I'll remove it from the OP since it's not relevant to the question. – yoeriboven Feb 27 '15 at 21:57
@yoeriboven: I have updated my answer for answering your question – Midhun MP Feb 27 '15 at 22:02

score 0 · Answer 2 · answered Feb 27 '15 at 22:00

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Create a common.h file and put it in there. Import it where necessary.

answered Feb 27 '15 at 22:00

Earl Grey

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Custom NSLog without precompiled header

2 Answers2