void Update () {
        var h = Input.GetAxis("Horizontal");
        var v = Input.GetAxis("Vertical");
        //anim.SetFloat("Speed",v * 2.6f);
        //anim.SetFloat("runRotation", h * 2.3f);
        //print(Time.timeScale);
        //print(h);
        if (Mathf.Abs(h) > 0.1f || Mathf.Abs(v) > 0.1f)
        {
            float newSpeed = Mathf.Lerp(anim.GetFloat("Speed"), 5.6f, moveSpeed * Time.deltaTime);
            anim.SetFloat("Speed", newSpeed);

            Vector3 targetVec = new Vector3(h, 0, v);
            Vector3 currentVec = transform.forward;
            print("targetVec:" + targetVec);
            print("currentVec:" + currentVec);
            float angle = Vector3.Angle(targetVec, currentVec);
            print("angle:"+angle);
            //if (angle > 180) {

           // ...进不来
            //}
       
            transform.Rotate(Vector3.up * angle * Time.deltaTime*rotateSpeed);
        }
        else {
            anim.SetFloat("Speed", 0f);
        }

    }

我print出来都不超过180度