如何访问面板的子组件？统一

Question

此语句中出现此错误我试图在Dropzone区域中获取图像对象，所有脚本均已附加到编辑器。我已经检查过了。找不到问题，请帮忙。 Error image

     public void CardDetect()
    {
        D = new DropZone();


        List<Image> listofcard = new List<Image>();

for (int i = 0; i<D.transform.childCount - 1; i++)
        {
            if (listofcard != null)
            {
                listofcard.Add(D.transform.GetChild(i).transform.GetComponents<Image>()[i]);

            }

        }

        for(int i = D.transform.childCount - 1; i > 0; i--)
        {
            // this.PlaceholderParent.transform.Find("Pane").GetComponent<Image>().tag = "ileri"
            if (D.transform.GetChild(i).transform.name == "ileriprefab1")
            {
                ileri = true;
            }


            if (D.transform.GetChild(i).transform.name == "sağprefab")
            {

                sağ = true;

            }
            if (D.transform.GetChild(i).transform.name == "solprefab")
            {
                sol = true;
            }

            if (D.transform.GetChild(i).transform.name == "fprefab")
            {

                f = true;
            }




        }

  

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