log of objective-c

gistfile1.matlab

#pragma mark - 

#define DEFAULT_LOG_FILENAME @"log.log"

- (void)log:(NSString *)log
{
#ifdef DEBUG
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *baseDir = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
    NSString *logPath = [baseDir stringByAppendingPathComponent:DEFAULT_LOG_FILENAME];

    // dispatch_once needed ? 
    if (![[NSFileManager defaultManager] fileExistsAtPath:logPath]) {
        [[NSFileManager defaultManager] createFileAtPath:logPath contents:nil attributes:nil];
    }

    FILE *file = fopen([logPath UTF8String], "ab");
    fwrite([log UTF8String], strlen([log UTF8String]), 1, file);
    fclose(file);
#endif
}