UGUI-ObjectPool<T>

作者：追风剑情发布于：2019-6-5 20:45 分类：Unity3d

示例

using System.Collections.Generic;
using UnityEngine.Events;
using UnityEngine;
 
/// <summary>
/// 对象池
/// new()约束T必须要有无参构造函数
/// </summary>
/// <typeparam name="T"></typeparam>
public class ObjectPool<T> where T : new()
{
    private readonly Stack<T> m_Stack = new Stack<T>();
    private readonly UnityAction<T> m_ActionOnGet;
    private readonly UnityAction<T> m_ActionOnRelease;
 
    public int countAll { get; private set; }
    public int countActive { get { return countAll - countInactive; } }
    public int countInactive { get { return m_Stack.Count; } }
 
    public ObjectPool(UnityAction<T> actionOnGet, UnityAction<T> actionOnRelease)
    {
        m_ActionOnGet = actionOnGet;
        m_ActionOnRelease = actionOnRelease;
    }
 
    public T Get()
    {
        T element;
        if (m_Stack.Count == 0)
        {
            element = new T();
            countAll++;
        }
        else
        {
            element = m_Stack.Pop();
        }
        if (m_ActionOnGet != null)
            m_ActionOnGet(element);
        return element;
    }
 
    public void Release(T element)
    {
        if (m_Stack.Count > 0 && ReferenceEquals(m_Stack.Peek(), element))
            Debug.LogError("Internal error. Trying to destroy object that is already released to pool.");
        if (m_ActionOnRelease != null)
            m_ActionOnRelease(element);
        m_Stack.Push(element);
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public static class ListPool<T>
{
    // Object pool to avoid allocations.
    private static readonly ObjectPool<List<T>> s_ListPool = new ObjectPool<List<T>>(null, Clear);
    static void Clear(List<T> l) { l.Clear(); }
 
    public static List<T> Get()
    {
        return s_ListPool.Get();
    }
 
    public static void Release(List<T> toRelease)
    {
        s_ListPool.Release(toRelease);
    }
}