private List<Sprite> storeTexture;
    public void Start()
    {
        storeTexture = new List<Sprite>();
        storeTexture.Clear();
        //加載圖片並儲存在List中
        Sprite texture1 = Resources.Load<Sprite>("Textures/one");
        storeTexture.Add(texture1);
        Sprite texture2 
 
= Resources.Load<Sprite>("Textures/two");
        storeTexture.Add(texture2);
        Sprite texture3 = Resources.Load<Sprite>("Textures/3");
        storeTexture.Add(texture3);
        //遍歷List中物體並打印出名字
        foreach (var kk in storeTexture)
        {
            Debug.LogError(kk.name);
        }
    }
    
 
private float Timer = 0;
    private float value = 3;
    public void Update()
    {
        //Logo1從透明變為不透明狀態
        if (logoSwtich == LogoSwtich.Start)
        {
            Timer += Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(1, 1, 1, Timer);
            
 
if (Timer >= 1)
            {
                logoSwtich = LogoSwtich.DeleteLogo1Alpha;
            }
        }
        //Logo1從不透明變為透明狀態
        if (logoSwtich == LogoSwtich.DeleteLogo1Alpha)
        {
            Timer -= Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(1, 1, 1, Timer);
            if (Timer <= 0)
            {
                logoSwtich = LogoSwtich.ChangeLogo2;
            }
        }
        //將Logo1更換為Logo2
        if (logoSwtich == LogoSwtich.ChangeLogo2)
        {
            logo.GetComponent<Image>().sprite = storeTexture[1];
            logoSwtich = LogoSwtich.AddLogo2Alpha;
        }
        //Logo2從透明變為不透明狀態
        if (logoSwtich == LogoSwtich.AddLogo2Alpha)
        {
            Timer += Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(1, 1, 1, Timer);
            if (Timer >= 1)
            {
                logoSwtich = LogoSwtich.DeleteLogo2Alpha;
            }
        }
        //Logo1從不透明變為透明狀態
        if (logoSwtich == LogoSwtich.DeleteLogo2Alpha)
        {
            Timer -= Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(1, 1, 1, Timer);
            if (Timer <= 0)
            {
                logoSwtich = LogoSwtich.ChangeLogo3;
            }
        }
        //將Logo2更換為Logo3
        if (logoSwtich == LogoSwtich.ChangeLogo3)
        {
            logo.GetComponent<Image>().sprite = storeTexture[2];
            logoSwtich = LogoSwtich.AddLogo3Alpha;
        }
        //Logo3從透明變為不透明狀態
        if (logoSwtich == LogoSwtich.AddLogo3Alpha)
        {
            Timer += Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(1, 1, 1, Timer);
            if (Timer >= 1)
            {
                logoSwtich = LogoSwtich.DeleteLogo3Alph;
            }
        }
        //Logo3從不透明變為透明狀態
        if (logoSwtich == LogoSwtich.DeleteLogo3Alph)
        {
            Timer -= Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(1, 1, 1, Timer);
            if (Timer <= 0)
            {
                logoSwtich = LogoSwtich.ChangeLogo1;
            }
        }
        //將Logo3更換為Logo1
        if (logoSwtich == LogoSwtich.ChangeLogo1)
        {
            logo.GetComponent<Image>().sprite = storeTexture[0];
            logoSwtich = LogoSwtich.Start;
        }
    }
　　LogoSwtich logoSwtich = LogoSwtich.Start;
    //Logo圖片切換狀態
    public enum LogoSwtich
    {
        Start,
        DeleteLogo1Alpha,
        ChangeLogo2,
        AddLogo2Alpha,
        DeleteLogo2Alpha,
        ChangeLogo3,
        AddLogo3Alpha,
        DeleteLogo3Alph,
        ChangeLogo1,
        End
    }

unity中使用Image組件更換Logo圖片屬性如下：
1、sprite 用來渲染圖像的精靈。

2、overrideSprite　　設置用於呈現的覆蓋精靈，設置為null將恢復默認的srpite。

unity中使用RawImage組件更換圖片屬性是 texture （RawImage的紋理）

unity中實現三個Logo圖片進行3秒鐘的若隱若現後互相切換Logo圖片