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 = ; 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 - )
             {
                 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 = ;
             child.transform.position = new Vector3(startX + rendererWidthList[index] / 2.0f, , );
             startX = startX + offSet + rendererWidthList[index];
             index += ;
         }
     }
 }

lua代码：

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

     local length =    -- 初始化长度
     local offSet = 0.2 -- 间隔
     for i = , #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 /   -- 初始位置

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