Unity3d对象池

Posted 2021-11-22 huwenya

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Singleton.cs

using UnityEngine;
/// <summary>
/// 单例模版类
/// </summary>
public class Singleton<T> where T : new() {
    private static readonly T instance = new T();

    public static T Instance{
        get{
            return instance;
        }
    }
}

MonoSingleton.cs

using UnityEngine;
/// <summary>
/// 组建单例模版
/// </summary>
public class MonoSingleten<T> : MonoBehaviour where T : MonoBehaviour{
    private static T instance;
    public static T Instance{
        get{
            if (instance == null){
                GameObject go = new GameObject(typeof(T).Name);
                instance = go.AddComponent<T>();
            }
            return instance;
        }
        set {
            instance = value;
        }
    }

    protected virtual void Awake(){
        Instance = this as T;
    }
}

IReusable.cs

using UnityEngine;
/// <summary>
/// 对象池接口
/// </summary>
public interface IReusable{
    //对象从对象池实例化的回调
    void OnSpawned();
    //对象返回对象池后的回调
    void OnUnSpawned();
}

PrefabType.cs

public enum PrefabType{
    None = 0,
    Effects = 1,
    Roles = 2,
}

ResourcesPath.cs

using UnityEngine;
/// <summary>
/// 资源路径
/// </summary>
public class ResourcesPath {
    public const string prefabRoles = "Prefabs/Roles/";
    public const string prefabEffects = "Prefabs/Effects/";

    public static string GetPath(PrefabType type, string name){
        string path = string.Empty;
        switch(type){
            case PrefabType.Effects:
                path = ResourcesPath.prefabEffects + name;
                break;
            case PrefabType.Roles:
                path = ResourcesPath.prefabRoles + name;
                break;
        }
        return path;
    }
}

ResourceFactory.cs

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

/// <summary>
/// 资源工厂
/// </summary>
public class ResourceFactory : Singleton<ResourceFactory> {
    /// <summary>
    /// 加载资源
    /// </summary>
    /// <returns>The load.</returns>
    /// <param name="path">Path.</param>
    /// <typeparam name="T">The 1st type parameter.</typeparam>
    public T Load<T>(string path) where T : Object{
        T res = Resources.Load<T>(path);
        return res;
    }
}

ObjectPoolMananger.cs

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

/// <summary>
/// 对象池管理器
/// </summary>
public class ObjectPoolMananger : MonoSingleten<ObjectPoolMananger> {
    private Dictionary<string, ObjectPool> mPools = new Dictionary<string, ObjectPool>();

    //从对象池取出对象
    public GameObject Spawn(PrefabType type, string name, Vector3 pos = default(Vector3), Quaternion rotation = default(Quaternion), Transform parent = null){
        ObjectPool pool = null;
        if (!mPools.ContainsKey(name)){
            //创建对象池
            RegisterPoll(type, name);
        }
        pool = mPools[name];
        //从对象池中取出一个物体
        GameObject obj = pool.Spawn();

        obj.transform.SetParent(parent);
        obj.transform.localPosition = pos;
        obj.transform.localRotation = rotation;
        return obj;

    }

    /// <summary>
    /// 对象池回收物体
    /// </summary>
    /// <param name="obj">Object.</param>
    public void UnSpawn(GameObject obj){
        foreach(ObjectPool pool in mPools.Values){
            if (pool.Contains(obj)){
                pool.UnSpawn(obj);
                return ;
            }
        }
        Destroy(obj);
    }

    /// <summary>
    /// 回收所有物体
    /// </summary>
    public void UnSpwanAll(){
        foreach(ObjectPool pool in mPools.Values){
            pool.UnSpawnAll();
        }
    }
    private void RegisterPoll(PrefabType type, string name){
        string path = ResourcesPath.GetPath(type, name);
        GameObject prefab = ResourceFactory.Instance.Load<GameObject>(path);
        ObjectPool pool = new ObjectPool(prefab);
        mPools.Add(name, pool);
    }
}

ObjectPool.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 对象池类
/// </summary>
public class ObjectPool{
    //预制体
    private GameObject mPrefab;
    //对象池
    private List<GameObject> objectlist = new List<GameObject>();

    //构造方法
    public ObjectPool(GameObject prefab){
        this.mPrefab = prefab;
    }

    /// <summary>
    /// 取出物体
    /// </summary>
    /// <returns>The spawn.</returns>
    public GameObject Spawn(){
        GameObject obj = null;
        for (int i = 0; i < objectlist.Count; i++){
            if (!objectlist[i].activeSelf){//如果有物体隐藏
                obj = objectlist[i];
                break;
            }
        }
        if (obj == null){
            obj = GameObject.Instantiate(mPrefab);
            objectlist.Add(obj);
        }
        obj.SetActive(true);

        //获取对象池接口
        IReusable reusable = obj.GetComponent<IReusable>();
        if (reusable != null){
            reusable.OnSpawned();
        }
        return obj;
    }

    /// <summary>
    /// 回收物体
    /// </summary>
    /// <param name="obj">Object.</param>
    public void UnSpawn(GameObject obj){
        obj.SetActive(false);
        IReusable reusable = obj.GetComponent<IReusable>();
        if (reusable != null){
            reusable.OnUnSpawned();
        }
    }

    public void UnSpawnAll() {
        foreach (GameObject obj in objectlist){
            obj.SetActive(false);
            IReusable reusable = obj.GetComponent<IReusable>();
            if (reusable != null){
                reusable.OnUnSpawned();
            }
        }
    }

    /// <summary>
    /// 判断物体是否存在
    /// </summary>
    /// <returns>The contains.</returns>
    /// <param name="obj">Object.</param>
    public bool Contains(GameObject obj){
        return objectlist.Contains(obj);
    }
}

DestoryObjectPool.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 对象池销毁
/// </summary>
public class DestoryObjectPool : MonoBehaviour, IReusable {
    public float mDestoryTime = 0.1f;

    public void OnSpawned()
    {
        Invoke("UnSpawn", mDestoryTime);
    }

    public void OnUnSpawned()
    {
    }

    private void UnSpawn(){
        ObjectPoolMananger.Instance.UnSpawn(gameObject);
    }

}

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