如何在NSLog中摆脱所有这些垃圾？

Question

When I use

NSLog(@"fooBar")

it prints out a lot of stuff I don't want:

2009-09-03 13:46:34.531 MyApp[3703:20b] fooBar

Is there a way to print something to the console without this big prefix? I want to draw a table and some other things in the console so that space is crucial...

Answer 1

This is from Mark Dalrymple at borkware.com

http://borkware.com/quickies/single?id=261

A Quieter NSLog (General->Hacks) [permalink]

// NSLog() writes out entirely too much stuff.  Most of the time I'm
// not interested in the program name, process ID, and current time
// down to the subsecond level.
// This takes an NSString with printf-style format, and outputs it.
// regular old printf can't be used instead because it doesn't
// support the '%@' format option.

void QuietLog (NSString *format, ...)
{
  va_list argList;
  va_start (argList, format);
  NSString *message = [[[NSString alloc] initWithFormat: format
                                              arguments: argList] autorelease];
  printf ("%s", [message UTF8String]);
  va_end  (argList);

} // QuietLog

Answer 2

This is a variation on the borkware quickies: http://cocoaheads.byu.edu/wiki/a-different-nslog . It prints the file and line number of where the log takes place. I use it all the time.

Answer 3

NSLog just prints to strerr. Use fprintf instead.

fprintf(stderr, "foobar");