Xcode\'s debugger console makes it easy to see any debugging messages my app sends out using NSLog(), but it always sticks a timestamp prefix on them:
ARC Version:
void NFLog(NSString *format, ...)
{
va_list args;
va_start(args, format);
NSString *formattedString = [NSString stringWithFormat:format, args];
formattedString = [formattedString stringByAppendingString:@"\n"];
va_end(args);
[[NSFileHandle fileHandleWithStandardOutput] writeData: [formattedString dataUsingEncoding: NSUTF8StringEncoding]];
}
update:
What I am doing is add this code to xxx-Prefix.pch then you can use it anywhere:
#define newLine do { [(NSFileHandle*)[NSFileHandle fileHandleWithStandardOutput] writeData:[@"\n" dataUsingEncoding: NSUTF8StringEncoding]]; } while(0);
#define NFLog(args,...) do { [(NSFileHandle*)[NSFileHandle fileHandleWithStandardOutput] writeData:[[NSString stringWithFormat:args, ##__VA_ARGS__] dataUsingEncoding: NSUTF8StringEncoding]]; } while(0); newLine
and if you want NSLog back:
#define NFLog(args,...) NSLog(args,##__VA_ARGS__)