不管何種語(yǔ)言，對(duì)象的創(chuàng)建與銷毀都需要消耗一定的時(shí)間，Unity3D 也是如此，所以在場(chǎng)景中，如果某些對(duì)象需要頻繁的創(chuàng)建與銷毀，這個(gè)時(shí)候我們經(jīng)常采用對(duì)象池技術(shù)，這樣不僅可以降低對(duì)象的創(chuàng)建與銷毀的帶來(lái)的時(shí)間損耗，也是為了降低內(nèi)存的占用。 我們?cè)谧鲰?xiàng)目的時(shí)候，如果同一個(gè)物體要用到好多次，我們就不要再用實(shí)例化了，因?yàn)槊看蝿?chuàng)建一個(gè)新物體是很消耗資源的，引用對(duì)象池技術(shù)，顧名思義，把所有要用到的對(duì)象在初始化的時(shí)候都扔到這個(gè)池子里，想用的時(shí)候拿出來(lái)用，不想用的時(shí)候放回去，這樣會(huì)大大節(jié)省資源!
【一共是一個(gè)Demo，兩個(gè)版本，一個(gè)是一個(gè)對(duì)象的儲(chǔ)存與獲取，另一個(gè)版本是多個(gè)游戲?qū)ο蟮膬?chǔ)存與獲取，都寫在一個(gè)類中的，下面就為大家分享一下對(duì)象池的實(shí)現(xiàn)】
DemoName：ObjectPool
Demo下載地址：http://pan.baidu.com/s/1kVdGLHd

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

/// <summary>
/// 對(duì)象池管理腳本，無(wú)需掛載
/// </summary>
public class ObjectPools
{
    #region 對(duì)象池

    /// <summary>
    /// 對(duì)象池1，創(chuàng)建單個(gè)對(duì)象
    /// </summary>
    List<GameObject> pools1;

    /// <summary>
    /// 以字典的方式儲(chǔ)存對(duì)象到池中，int類型key，集合類型的value
    /// </summary>
    Dictionary<int, List<GameObject>> pools2;

    //單例
    private static ObjectPools singleton;

    /// <summary>
    /// 獲取對(duì)象，單例
    /// </summary>
    /// <returns></returns>
    public static ObjectPools GetInstance()
    {
        if (singleton == null)
        {
            singleton = new ObjectPools();
        }
        return singleton;
    }

    //構(gòu)造函數(shù)初始化對(duì)象池
    public ObjectPools()
    {
        pools1 = new List<GameObject>();
        pools2 = new Dictionary<int, List<GameObject>>();
    }

    #endregion

    #region 儲(chǔ)存單個(gè)游戲?qū)ο蟮匠刂?
    /// <summary>
    /// 儲(chǔ)存單個(gè)游戲?qū)ο蟮匠刂?    /// </summary>
    /// <param name="gameObject">創(chuàng)建的游戲?qū)ο?lt;/param>
    /// <param name="pos">位置</param>
    /// <param name="rotation">旋轉(zhuǎn)</param>
    /// <returns>返回的對(duì)象</returns>
    public GameObject SwpanObject(GameObject gameObject, Vector3 pos, Quaternion rotation)
    {
        //如果池中的對(duì)象數(shù)量大于0
        if (pools1.Count > 0)
        {
            GameObject result = pools1[0]; //提取第一個(gè)對(duì)象
            pools1.Remove(result); //從集合中清除提取的對(duì)象
            result.SetActive(true); //設(shè)置當(dāng)前對(duì)象激活
            result.transform.position = pos; //設(shè)置對(duì)象的初始位置
            result.transform.rotation = rotation; //設(shè)置對(duì)線下的初始旋轉(zhuǎn)
            return result; //返回游戲?qū)ο?        }
        //否則，直接實(shí)例化游戲?qū)ο蟛⒎祷?        return GameObject.Instantiate(gameObject, pos, rotation) as GameObject;
    }


    /// <summary>
    /// 隱藏當(dāng)前游戲?qū)ο蟛⑻砑拥匠刂?    /// </summary>
    /// <param name="gameObejct">游戲?qū)ο?lt;/param>
    public void DestoryObject(GameObject gameObejct)
    {
        //關(guān)閉當(dāng)前游戲?qū)ο箫@示
        gameObejct.SetActive(false);
        //添加到集合中
        pools1.Add(gameObejct);
    }

    #endregion

    #region 儲(chǔ)存多個(gè)游戲?qū)ο蟮匠刂?
    /// <summary>
    /// 實(shí)例化并儲(chǔ)存游戲?qū)ο蟮匠刂?    /// </summary>
    /// <param name="gameObject">被創(chuàng)建的游戲?qū)ο?lt;/param>
    /// <param name="pos">位置</param>
    /// <param name="rotation">旋轉(zhuǎn)</param>
    /// <returns>返回當(dāng)前游戲?qū)ο?lt;/returns>
    public GameObject SwpanObject2(GameObject gameObject, Vector3 pos, Quaternion rotation)
    {
        //獲取到當(dāng)前對(duì)象的ID（每個(gè)游戲?qū)ο蠖加懈髯缘腎D）
        int key = gameObject.GetInstanceID();
        //如果池中包含key當(dāng)前游戲?qū)ο蟮膋ey值（游戲?qū)ο蟮腎D）
        if (pools2.ContainsKey(key))
        {
            //如果池中的對(duì)象數(shù)量大于0
            if (pools2[key].Count > 0)
            {
                //提取第一個(gè)對(duì)象（key就是ID（ID就是相對(duì)應(yīng)的游戲?qū)ο螅?代表的是這個(gè)key中第一個(gè)對(duì)象）
                GameObject result = pools2[key][0];
                result.SetActive(true); //激活顯示當(dāng)前對(duì)象
                pools2[key].Remove(result); //從池中清除對(duì)象游戲?qū)ο?                result.transform.position = pos; //設(shè)置初始位置
                result.transform.rotation = rotation; //設(shè)置初始旋轉(zhuǎn)
                return result; //返回提取的游戲?qū)ο?            }
        }
        //否則，實(shí)例化對(duì)象并接收
        GameObject res = GameObject.Instantiate(gameObject, pos, rotation) as GameObject;
        //儲(chǔ)存游戲?qū)ο蟮腎D，轉(zhuǎn)換成字符串
        res.name = gameObject.GetInstanceID().ToString();
        //返回場(chǎng)景的游戲?qū)ο?        return res;
    }


    /// <summary>
    /// 隱藏當(dāng)前游戲?qū)ο蟛⑻砑拥匠刂?    /// </summary>
    /// <param name="gameObject">游戲?qū)ο?lt;/param>
    public void DestoryObject2(GameObject gameObject)
    {
        //當(dāng)前游戲?qū)ο蟛患せ?        gameObject.SetActive(false);
        //獲取當(dāng)前游戲?qū)ο蟮膋ey值，轉(zhuǎn)換成int類型
        int key = int.Parse(gameObject.name);
        //如果池中不包含key值對(duì)應(yīng)的游戲?qū)ο?        if (!pools2.ContainsKey(key))
        {
            //添加對(duì)象到池中，并開(kāi)辟value空間
            pools2.Add(key, new List<GameObject>());
        }
        //否則直接添加key對(duì)應(yīng)的游戲?qū)ο蟮匠刂?        pools2[key].Add(gameObject);
    }

    #endregion

    #region 協(xié)程，延遲關(guān)閉游戲?qū)ο蟮娘@示

    /// <summary>
    /// 協(xié)程，延遲隱藏游戲?qū)ο螅瑔蝹€(gè)游戲?qū)ο?    /// </summary>
    /// <param name="gameObject">隱藏的游戲?qū)ο?lt;/param>
    /// <param name="time">隱藏的時(shí)間間隔</param>
    /// <returns></returns>
    public IEnumerator IEDestory(GameObject gameObject, float time)
    {
        yield return new WaitForSeconds(time);
        GetInstance().DestoryObject(gameObject);
    }

    /// <summary>
    /// 協(xié)程，延遲隱藏游戲?qū)ο螅螒驅(qū)ο髷?shù)組
    /// </summary>
    /// <param name="gameObject">隱藏的游戲?qū)ο?lt;/param>
    /// <param name="time">隱藏的時(shí)間間隔</param>
    /// <returns></returns>
    public IEnumerator IEDestory2(GameObject gameObject, float time)
    {
        yield return new WaitForSeconds(time);
        GetInstance().DestoryObject2(gameObject);
    }
   #endregion
}

using UnityEngine;

/// <summary>
/// 對(duì)象池的調(diào)用，掛載到空物體即可
/// </summary>
public class GameManager : MonoBehaviour
{
    //儲(chǔ)存單個(gè)游戲?qū)ο蟮綄?duì)象池中
    public GameObject player;

    //需要利用到對(duì)象池的游戲?qū)ο髷?shù)組（同時(shí)創(chuàng)建多個(gè)游戲?qū)ο螅?    public GameObject[] players;


    void Update()
    {
        //單個(gè)游戲?qū)ο蟮牟寮?        if (Input.GetMouseButtonDown(2))
        {
            //按下鼠標(biāo)中鍵的時(shí)候創(chuàng)建一個(gè)游戲?qū)ο?            GameObject go =
                ObjectPools.GetInstance().SwpanObject(player, Vector3.zero, Quaternion.identity) as GameObject;
            //開(kāi)啟協(xié)程，延遲隱藏對(duì)象
            StartCoroutine(ObjectPools.GetInstance().IEDestory(go, 2f));
        }

        //游戲?qū)ο髷?shù)組的創(chuàng)建
        if (Input.GetMouseButtonDown(0))
        {
            //按下左鍵，創(chuàng)建數(shù)組中第1個(gè)游戲?qū)ο?            GameObject go = ObjectPools.GetInstance().SwpanObject2(players[0],
                Vector3.zero, Quaternion.identity);

            //開(kāi)啟協(xié)程，延遲隱藏對(duì)象
            StartCoroutine(ObjectPools.GetInstance().IEDestory2(go, 2f));
        }

        if (Input.GetMouseButtonDown(1))
        {
            //按下右鍵，創(chuàng)建數(shù)組中第2個(gè)游戲?qū)ο?            GameObject go = ObjectPools.GetInstance().SwpanObject2(players[1],
                Vector3.zero, Quaternion.identity);
            //開(kāi)啟協(xié)程，延遲隱藏對(duì)象
            StartCoroutine(ObjectPools.GetInstance().IEDestory2(go, 2f));
        }
    }
}