说对象池之前首先来看看单例类和单例脚本的区别。这里有介绍

 

使用对象池的好处是不用每次都创建对象。销毁在创建，比如子弹的发射，当创建好的子弹。可以在使用后保存到对象池里面。当用的时候。直接从对象池中取即可

这里随便举个列子

鼠标左键单击发射蓝色球。右键发射红色球

Main Camera挂载Fire.cs脚本

GameObject挂载单列脚本ObjectPools.cs

Fire.cs代码

1 using UnityEngine; 2 using System.Collections; 3  4 public class Fire : MonoBehaviour 5 { 6  7     public GameObject builPrefabRed; 8  9     public GameObject builPrefabGreen;10 11     GameObject o;12 13     // Use this for initialization14     void Start()15     {16 17     }18 19     // Update is called once per frame20     void Update()21     {22 23         if (Input.GetMouseButtonDown(1))24         {25 26             o = ObjectPools.Instance.MyInstantiate(builPrefabRed, transform.position, Quaternion.identity) as GameObject;27 28             //o = Instantiate(builPrefab, transform.position, Quaternion.identity) as GameObject;29 30             o.rigidbody.AddForce(Vector3.forward * 200);31 32             //Destroy(o, 2);33         }34         else if (Input.GetMouseButtonDown(0))35         {36             o = ObjectPools.Instance.MyInstantiate(builPrefabGreen, transform.position, Quaternion.identity) as GameObject;37 38             o.rigidbody.AddForce(Vector3.forward * 200);39         }40     }41 }

ObjectPools.cs类

1 using UnityEngine; 2 using System.Collections; 3 using System.Collections.Generic; 4  5 /// 
 6 /// 对象池脚本 7 ///  8 /// 管理子弹。当子弹用完后。回收 9 /// 
10 public class ObjectPools : MonoBehaviour11 {12 13     GameObject result;14 15     List
     
       poolsred;16 17 18     Dictionary
      
       > poolList;19 20 21     private static ObjectPools instance;22 23     public static ObjectPools Instance24     {25         get { return instance; }26         //set { ObjectPools.instance = value; }27     }28 29     void Awake()30     {31         poolsred = new List
       
        (); //实例化对象池32 33         instance = this; //单列34 35         poolList = new Dictionary
        
         >();36     }37     string tag;38     public GameObject MyInstantiate(GameObject prefab, Vector3 position, Quaternion rotation)39     {40         tag = prefab.tag;41         //如果有某个小集合的key，并且小集合内元素数量大于042         if (poolList.ContainsKey(tag) && poolList[tag].Count > 0) //弹夹里面有子弹43         {44             result = poolList[tag][0];//取弹夹里面的第一颗子弹45             poolList[tag].Remove(result); //从弹夹移除子弹46 47             result.transform.position = position;48             result.transform.rotation = rotation;49         }50         else51         {52 53             if (!poolList.ContainsKey(tag))54             {55                 poolList.Add(tag, new List
         
          ());56             }57             result = Instantiate(prefab, position, rotation) as GameObject;58         }59         //开启协程方法60         StartCoroutine(ReturnToPools(result));61         result.SetActive(true);62         return result;63     }64 65 66     /// 
          
67 /// 协程 同步方法 在同一个线程里面68 /// 
69     /// 
          70     /// 
          71     public IEnumerator ReturnToPools(GameObject bullet)72     {73         yield return new WaitForSeconds(2f); //等待2秒74 75         poolList[bullet.tag].Add(bullet);76 77         //poolsred.Add(bullet);78 79 80         //取消力81         bullet.rigidbody.velocity = Vector3.zero;82 83         bullet.SetActive(false);84     }85 86     // Use this for initialization87     void Start()88     {89 90     }91 92     // Update is called once per frame93     void Update()94     {95 96     }97 }