directory creation

+ (void)createDirForImage:(NSString *)CalendarDir {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *pathToCalendarDir = [[paths objectAtIndex:0] stringByAppendingPathComponent:CalendarDir];
    calendarFolder = CalendarDir;
    NSError *error;
    //Does directory already exist?
    if (![[NSFileManager defaultManager] fileExistsAtPath:pathToCalendarDir]) {
        if (![[NSFileManager defaultManager] createDirectoryAtPath:pathToCalendarDir
                                       withIntermediateDirectories:NO
                                                        attributes:nil
                                                             error:&error]) {
            NSLog(@"Create directory error: %@", error);
        }
    }
}