方式一：将摄像机直接拖到游戏对象的下面；

方式二：脚本实现

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class kow : MonoBehaviour
{
    public Transform targetTr;
    public float dist = 10.0F;
    public float height = 3.0F;
    public float dampTrace = 20.0F;

    private Transform tr;

    // Start is called before the first frame update
    void Start()
    {
        tr = GetComponent<Transform>();
    }

    // Update is called once per frame
    void LateUpdate()
    {
        tr.position = Vector3.Lerp(tr.position, targetTr.position - (targetTr.forward * dist) + (Vector3.up * height), Time.deltaTime * dampTrace);
        tr.LookAt(targetTr.position);
    }
}

 这里主要的是Vector3.Lerp()和函数，三个参数，第一个：起始位置；第二个：结束位置；第三个：浮点格式。