学步园

- (NSString *)getTimeNow
{
    NSString* date;
   
    NSDateFormatter * formatter = [[NSDateFormatter alloc ] init];
    //[formatter setDateFormat:@"YYYY.MM.dd.hh.mm.ss"];
    [formatter setDateFormat:@"YYYY-MM-dd hh:mm:ss:SSS"];
    date = [formatter stringFromDate:[NSDate date]];
    timeNow = [[NSString alloc] initWithFormat:@"%@", date];
    NSLog(@"%@", timeNow);
    return timeNow;
}

返回当前时间，精确到毫秒。