返回游戏对象的数组列表和网格问题

我试图生成一个网格Unity3d并将所有瓷砖存储在一个数组中。我也想在其他函数中使用创建的数组。

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class createGridClean : MonoBehaviour {
    public GameObject tilePrefab = null;
    public int numberOfTiles = 10;
    public int tilesPerColumn = 4;
    public float distanceBetweenTiles = 2.0f;
    public Material newmat = null;
    // Use this for initialization
    void Start () {
        CreateTiles ();
    }
    // Update is called once per frame
    void Update () {
    }
    public ArrayList[] CreateTiles(){
        GameObject[] allTiles = new GameObject[numberOfTiles*tilesPerColumn];
        float xOffset = 0.0f;
        float zOffset = 0.0f;
        for (int createdTiles = 0; createdTiles <= numberOfTiles; createdTiles++) {
            xOffset += distanceBetweenTiles;
            if ( createdTiles % tilesPerColumn == 0){
                zOffset += distanceBetweenTiles;
                xOffset = 0.0f;
            }
            allTiles[createdTiles] = Instantiate (tilePrefab, new Vector3 (0f + xOffset, 0f, 0f + zOffset), Quaternion.identity) as GameObject;
        }
        return allTiles;
    }
}

但这是输出：

Assets/my/Script/createGridClean.cs(34,17): error CS0029: Cannot implicitly convert type `UnityEngine.GameObject[]' to `System.Collections.ArrayList[]'

我什至对网格有问题，每次都会生成一个额外的和不需要的额外立方体！

（这是我用 C# 翻译的原始代码）

function CreateTiles()
{
    var xOffset: float = 0.0;
    var zOffset: float = 0.0;
    for(var tilesCreated: int = 0; tilesCreated < numberOfTiles; tilesCreated += 1)
    {
        xOffset += distanceBetweenTiles;
        if(tilesCreated % tilesPerRow == 0)
        {
            zOffset += distanceBetweenTiles;
            xOffset = 0;
        }
        Instantiate(tilePrefab, Vector3(transform.position.x + xOffset, transform.position.y, transform.position.z + zOffset), transform.rotation);
    }
}

任何帮助都会很棒！

谢谢马可

public ArrayList[] CreateTiles()
{
    GameObject[] allTiles = new GameObject[numberOfTiles*tilesPerColumn];
...
    return allTiles;
}

public GameObject[] CreateTiles()
{
    GameObject[] allTiles = new GameObject[numberOfTiles*tilesPerColumn];
...
    return allTiles;
}