1.首先搭建一个简易的场景和人物，我在这里利用一个圆柱加一个cube代表人物，其次保证人物模型的本地坐标与世界坐标保持统一，如图所示

2.在人物身上添加PlayerController脚本，源码如下：

using UnityEngine;using System.Collections; public class PlayerController : MonoBehaviour { float ver = 0; float hor = 0; public float turnspeed = 10;  // Use this for initialization void Start () {  }  // Update is called once per frame void Update () { hor = Input.GetAxis("Horizontal"); ver = Input.GetAxis("Vertical");  } void Rotating (float hor, float ver) { //获取方向 Vector3 dir = new Vector3 (hor,0,ver); //将方向转换为四元数 Quaternion quaDir = Quaternion.LookRotation(dir,Vector3.up); //缓慢转动到目标点 transform.rotation = Quaternion.Lerp(transform.rotation,quaDir,Time.fixedDeltaTime*turnspeed);    }  void FixedUpdate(){   if(hor!= 0 ||ver!= 0 ){  //转身  Rotating(hor,ver);     } } }