Extended NSLog() http://mobile.tutsplus.com/tutorials/iphone/customize-nslog-for-easier-debugging/

ExtendNSLog.h

#import <Foundation/Foundation.h>
#ifdef DEBUG
#define NSLog(args...) ExtendNSLog(__FILE__,__LINE__,__PRETTY_FUNCTION__,args);
#else
#define NSLog(x...)
#endif
void ExtendNSLog(const char *file, int lineNumber, const char *functionName, NSString *format, ...);

ExtendNSLog.m

#import "ExtendNSLogFunctionality.h"

void ExtendNSLog(const char *file, int lineNumber, const char *functionName, NSString *format, ...) {
    // Type to hold information about variable arguments.
    va_list ap;
    // Initialize a variable argument list.
    va_start (ap, format);
    // NSLog only adds a newline to the end of the NSLog format if
    // one is not already there.
    // Here we are utilizing this feature of NSLog()
    if (![format hasSuffix: @"\n"]) {
        format = [format stringByAppendingString: @"\n"];
    }
    NSString *body = [[NSString alloc] initWithFormat:format arguments:ap];
    // End using variable argument list.
    va_end (ap);
    NSString *fileName = [[NSString stringWithUTF8String:file] lastPathComponent];
    fprintf(stderr, "(%s) (%s:%d) %s", functionName, [fileName UTF8String], lineNumber, [body UTF8String]);
}

Prefix.pch

#ifdef __OBJC__
    #import <UIKit/UIKit.h>
    #import <Foundation/Foundation.h>
    #import "ExtendNSLog.h"
#endif