2d图片依次排列在屏幕中间（SpriteRenderer）

如图所示：

 C#代码：

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

public class SpriteRendererTest : MonoBehaviour {
    List<Transform> list = new List<Transform>();  // 存储父物体的子对象
    List<float> rendererWidthList = new List<float>(); // 存储子对象的宽度
    private Vector3 centerPos = Vector3.zero;  // 中心位置
    private float offSet = 0.2f; //偏移量
    private float length = 0.0f; // 初始化长度

    void Start () {
        // 遍历所有子对象
        for (int i = 0; i < gameObject.transform.childCount; i++) {
            var child = gameObject.transform.GetChild(i);
            var width = child.GetComponent<SpriteRenderer>().sprite.bounds.size.x;
            if (i < gameObject.transform.childCount - 1)
            {
                length += width + offSet;
            }
            else {
                length += width;
            }
            list.Add(child);
            rendererWidthList.Add(width);
        }
        var startX = centerPos.x - length / 2.0f;  //第一个子对象的左边界
        foreach (var child in list)
        {
            int index = 0;
            child.transform.position = new Vector3(startX + rendererWidthList[index] / 2.0f, 0, 0);
            startX = startX + offSet + rendererWidthList[index];
            index += 1;
        }     
    }
}

lua代码：

-- 创建数组
    local parent = UGameObject.Find("Parent")
    local objectList = {}
    local rendererWidthList = {}
    for i = 1, parent.transform.childCount do
        local child = parent.transform:GetChild(i - 1)
        local renderer = child:GetComponent(typeof(USpriteRenderer))
        local width = renderer.sprite.bounds.size.x
        table.insert(objectList, child)
        table.insert(rendererWidthList, width)
    end

    local length = 0   -- 初始化长度
    local offSet = 0.2 -- 间隔
    for i = 1, #objectList do
        local obj = objectList[i]
        local width = rendererWidthList[i]
        if i == #objectList then
            length = length + width
            break
        end
        length = length + width + offSet
    end

    local centerPos = Vector3.zero  -- 中心位置
    local startX = centerPos.x - length / 2  -- 初始位置

    for i = 1, #objectList do
        local obj = objectList[i]
        local width = rendererWidthList[i]
        obj.transform.position = Vector3(startX + width / 2, 0, 0)
        startX = startX + width + offSet
    end