其实就是一个简单的计时器，到多少时间自动加载下一张图片，在判断个是否循环，说起来挺容易，自己想的时候还是想了好久哈哈，最后代码也不多，给大家分享下：

public class UIAnimation : MonoBehaviour
    {


        public Sprite[] UIArray;//图片数组

        public bool Loop = false;//是否循环

        private Image image;//载体Image
        [Range(1, 100)]
        public float playSpeed;//播放速度
        private float interval;//间隔

        private bool isRun = false;
        private float timer;
        // private  bool isUpdate = true;


        // Use this for initialization
        void OnEnable()
        {
            image = GetComponent<Image>();
            isRun = true;
            StartCoroutine(TUI());
        }

        void Start()
        {
            interval = 1 / playSpeed;
        }

        IEnumerator TUI()
        {
            int i = 0;
            while (isRun)
            {
                timer += Time.deltaTime;
                if (timer >= interval)
                {
                    timer = 0;
                    if (i < UIArray.Length)
                    {
                        image.sprite = UIArray[i++];
                        if (Loop && i >= UIArray.Length)
                        {
                            i = 0;
                        }
                    }
                    else
                    {

                        break;
                    }
                }
                yield return null;
            }
        }
    }