redefine NSLog in Xcode

Question

I Have a question about Xcode and Objective-C.

I want to make this simple action in Xcode:

If I type this :

NSLog(@"something else");

I want Xcode to write (or execute after compile):

NSLog(@"[%@] something else", NSStringFromClass([self class]));

Another way could be for Xcode 4 to suggest this in the autocomplete menu, when I type NSLog...

Answer 1

Here is a complete set of Log #define directives (including ULog, a UIAlertView based Logging feature)

// DLog will output like NSLog only when the DEBUG variable is set

#ifdef DEBUG
#   define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
#else
#   define DLog(...)
#endif

// ALog will always output like NSLog

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

// ULog will show the UIAlertView only when the DEBUG variable is set 

#ifdef DEBUG
#   define ULog(fmt, ...)  { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:[NSString stringWithFormat:@"%s\n [Line %d] ", __PRETTY_FUNCTION__, __LINE__] message:[NSString stringWithFormat:fmt, ##__VA_ARGS__]  delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil]; [alert show]; }
#else
#   define ULog(...)
#endif

As written by Ciryon, just put them in your precompiled header (.pch) file.

(source: http://overbythere.co.uk/blog/2012/01/alternatives-nslog)

Answer 2

You probably rather want to make a macro and put it in your precompile header (.pch) file.

#ifdef DEBUG
#   define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
#else
#   define DLog(...)
#endif

(Taken from this blog post)