Unity 控制摄像机跟随运动物体

把以下代码绑定到摄像机

using UnityEngine;
using System.Collections;

public class FollowTarget : MonoBehaviour {

    public Transform playerTransform;  //把运动物体拖放到此处
    private Vector3 offset;

    // Use this for initialization
    void Start () {

      offset =  transform.position - playerTransform.position;  //计算初始物体与相机的偏移距离

    }

    // Update is called once per frame
    void Update () {
        transform.position =  playerTransform.position + offset;   //运动物体当前位置 加上 原始偏移
    }
}