// returns an instance of the prefab
public GameObject GetObject()
{
GameObject spawnedGameObject;
// if there is an inactive instance of the prefab ready to return, return that
if (inactiveInstances.Count > 0)
{
// remove the instance from teh collection of inactive instances
spawnedGameObject = inactiveInstances.Pop();
}
// otherwise, create a new instance
else
{
spawnedGameObject = (GameObject)GameObject.Instantiate(prefab);
// add the PooledObject component to the prefab so we know it came from this pool
UIPooledObject pooledObject = spawnedGameObject.AddComponent <UIPooledObject>();
pooledObject.pool = this;
}
// put the instance in the root of the scene and enable it
// spawnedGameObject.transform.SetParent(null,false);
spawnedGameObject.SetActive(true);
// return a reference to the instance
return(spawnedGameObject);
}
// return an instance of the prefab to the pool
public void ReturnObject(GameObject toReturn)
{
UIPooledObject pooledObject = toReturn.GetComponent <UIPooledObject>();
// if the instance came from this pool, return it to the pool, and no maximum cache count exceeded
if (pooledObject != null && pooledObject.pool == this && inactiveInstances.Count < maxCount)
{
// make the instance a child of this and disable it
toReturn.transform.SetParent(transform, false);
toReturn.SetActive(false);
// add the instance to the collection of inactive instances
inactiveInstances.Push(toReturn);
}
// otherwise, just destroy it
else
{
DestroyImmediate(toReturn);
}
}