核心脚本代码

Image IMGE = transform.Find("IMGE").GetComponent<Image>();

Sprite sprite1 = Resources.Load("Textrues/yutujing", typeof(Sprite)) as Sprite;

IMGE.sprite = sprite1;

需要注意的是 Resources.Load 会读取Assets中Resources目录下的资源， Resources目录需要手动创建

或者

public Sprite[] sprites;

public Sprite[] sprite1;

void Update ()

    {

        if (a>=200)

        {

            int Random1 = Random.Range(0,11);

            for (int i = 0; i < 11; i++)

            {

                if (Random1==i)

            {

                image1 = Rt.transform.GetChild(0).transform.GetChild(0).GetComponent<Image>();

                image2 = Rt.transform.GetChild(0).transform.GetChild(1).GetComponent<Image>();

                image1.sprite=sprites[Random1];

                image2.sprite=sprite1[Random1];

            }

            }

            

            Instantiate(Rt,new Vector3 ( Random.Range (-860,850), 1, Random.Range (-717,-500)), Quaternion.Euler(new Vector3(0,0,0)));

            a=1;

            

        }else

        {

            a=a+1;

        }

        Debug.Log(a);

    }

}