public void TurnOver()
    {                                    //攻击后返回
        takedamage.PhysicAttackDamage(); //计算伤害
        anim.SetBool("fightToWalk", true);
        Vector3 backPos = transform.position - dir.normalized * (policeRange - attackRange);

        //mySequence.Append(transform.DORotate(new Vector3(0,180,0), 0.3f));
        //mySequence.Append(transform.DOLookAt(-dir, 0.3f));
        transform.Rotate(Vector3.up, 180);                //转身
        mySequence.Append(transform.DOMove(backPos, 1f)); //返回
        StartCoroutine("Backed");                         //返回后开启携程重新面对敌人
    }