Unity 5-对象池化而不是停用对象

Question

我在做一个没完没了的跑步游戏。我是一个编程的初学者，完成了this和this教程，所以我不能100%确定这些代码是如何工作的，这使得我很难弄清楚如何解决我的问题。代码应该使用对象池来创建平台，然后激活它们，停用它们，将它们移动到播放器前面，然后再次激活它们。(至少，我认为)这为玩家提供了无限的平台，而不必不断地实例化新的平台。下面是Platform Generator的代码：

using UnityEngine;
using System.Collections;

public class PlatformGenerator : MonoBehaviour
{

public GameObject thePlatform;
public Transform generationPoint;
public float distanceBetween;

private float platformWidth;

public float distanceBetweenMin;
public float distanceBetweenMax;

private int platformSelector;
private float[] platformWidths;
//  public GameObject[] thePlatforms;

public ObjectPooler[] theObjectPools;

private float minHeight;
private float maxHeight;
public Transform maxHeightPoint;
public float maxHeightChange;
private float heightChange;

void Start ()
{
//      platformWidth = thePlatform.GetComponent<BoxCollider2D> ().size.x;

    platformWidths = new float[theObjectPools.Length];

    for (int i = 0; i < theObjectPools.Length; i++)
    {
        platformWidths[i] =             theObjectPools[i].pooledObject.GetComponent<BoxCollider2D>().size.x;
    }

    minHeight = transform.position.y;
    maxHeight = maxHeightPoint.position.y;
}

void Update ()
{
    if (transform.position.x < generationPoint.position.x)
    {
        distanceBetween = Random.Range (distanceBetweenMin, distanceBetweenMax);

        platformSelector = Random.Range (0, theObjectPools.Length);

        heightChange = transform.position.y + Random.Range (maxHeightChange, -maxHeightChange);
        //          if you want to have platforms generating outside boundries, comment out this code:
        if (heightChange > maxHeight)
        {
            heightChange = maxHeight;
        }
        else if (heightChange < minHeight)
        {
            heightChange = minHeight;
        }

        transform.position = new Vector3 (transform.position.x + (platformWidths[platformSelector] / 2) + distanceBetween, heightChange, transform.position.z);

 //         Instantiate (/*thePlatform*/ thePlatforms[platformSelector], transform.position, transform.rotation);

        GameObject newPlatform = theObjectPools[platformSelector].GetPooledObject();

        newPlatform.transform.position = transform.position;
        newPlatform.transform.rotation = transform.rotation;
        newPlatform.SetActive (true);

        transform.position = new Vector3 (transform.position.x + (platformWidths[platformSelector] / 2), transform.position.y, transform.position.z);

    }
}
}

下面是对象池的代码：

public class ObjectPooler : MonoBehaviour
{
public GameObject pooledObject;
public int pooledAmount;

List<GameObject> pooledObjects;

void Start ()
{
    pooledObjects = new List<GameObject>();

    for (int i = 0; i < pooledAmount; i++)
    {
        GameObject obj = (GameObject) Instantiate (pooledObject);
        obj.SetActive (false);
        pooledObjects.Add (obj);
    }
}

public GameObject GetPooledObject()
{
    for (int i = 0; i < pooledObjects.Count; i++)
    {
        if (!pooledObjects[i].activeInHierarchy)
        {
            return pooledObjects[i];
        }
    }

    GameObject obj = (GameObject) Instantiate (pooledObject);
    obj.SetActive (false);
    pooledObjects.Add (obj);
    return obj;

}
}

脚本在几秒钟的时间内运行良好，但很快就会开始创建新的平台，这是我试图避免的。我认为发生的情况是平台没有被禁用，所以代码不能移动平台，而是创建新的平台。我相信这是一个很容易解决的问题，但我不确定该怎么办。有人知道怎么解决这个问题吗？谢谢。

Answer 1

据我所知，您的代码中没有将对象返回到池中的功能。有一个函数可以从池中获取一个对象，如果需要，它会自动实例化，否则会从池中拉出，并且您在启动方法逻辑中有预池，但您从未将对象放回。您需要创建一个函数将对象返回到池中。

Answer 2

函数

public GameObject GetPooledObject(){...}

如果对象在层次结构中被禁用，则返回池中的poolObject。否则，它将实例化一个新的池对象并返回该对象。

newPlatform.SetActive (true);

在update功能中，您可以将poolObject设置为活动状态，但决不能将其停用。因此，您的池子会不断生成新的对象。您需要使用object.setActive(false);来停用对象

你可以及时完成--比如每2秒对象消失一次(但对于不同的级别，你需要改变这一次)，或者你可以计算对象是否已经被交叉并且远远落后，然后你可以停用它。