unity中实现三个Logo图片进行3秒钟的若隐若现后互相切换Logo图片

    private List<Sprite> storeTexture;
    public void Start()
    {
        storeTexture = new List<Sprite>();
        storeTexture.Clear();
        //加载图片并储存在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);
        //遍历List中物体并打印出名字
        foreach (var kk in storeTexture)
        {
            Debug.LogError(kk.name);
        }
    }
    private float Timer = ;
    private float value = ;
    public void Update()
    {
        //Logo1从透明变为不透明状态
        if (logoSwtich == LogoSwtich.Start)
        {
            Timer += Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(, , , Timer);
            if (Timer >= )
            {
                logoSwtich = LogoSwtich.DeleteLogo1Alpha;
            }
        }
        //Logo1从不透明变为透明状态
        if (logoSwtich == LogoSwtich.DeleteLogo1Alpha)
        {
            Timer -= Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(, , , Timer);
            if (Timer <= )
            {
                logoSwtich = LogoSwtich.ChangeLogo2;
            }
        }
        //将Logo1更换为Logo2
        if (logoSwtich == LogoSwtich.ChangeLogo2)
        {
            logo.GetComponent<Image>().sprite = storeTexture[];
            logoSwtich = LogoSwtich.AddLogo2Alpha;
        }
        //Logo2从透明变为不透明状态
        if (logoSwtich == LogoSwtich.AddLogo2Alpha)
        {
            Timer += Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(, , , Timer);
            if (Timer >= )
            {
                logoSwtich = LogoSwtich.DeleteLogo2Alpha;
            }
        }
        //Logo1从不透明变为透明状态
        if (logoSwtich == LogoSwtich.DeleteLogo2Alpha)
        {
            Timer -= Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(, , , Timer);
            if (Timer <= )
            {
                logoSwtich = LogoSwtich.ChangeLogo3;
            }
        }
        //将Logo2更换为Logo3
        if (logoSwtich == LogoSwtich.ChangeLogo3)
        {
            logo.GetComponent<Image>().sprite = storeTexture[];
            logoSwtich = LogoSwtich.AddLogo3Alpha;
        }
        //Logo3从透明变为不透明状态
        if (logoSwtich == LogoSwtich.AddLogo3Alpha)
        {
            Timer += Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(, , , Timer);
            if (Timer >= )
            {
                logoSwtich = LogoSwtich.DeleteLogo3Alph;
            }
        }
        //Logo3从不透明变为透明状态
        if (logoSwtich == LogoSwtich.DeleteLogo3Alph)
        {
            Timer -= Time.deltaTime / value;
            logo.GetComponent<Image>().color = new Color(, , , Timer);
            if (Timer <= )
            {
                logoSwtich = LogoSwtich.ChangeLogo1;
            }
        }
        //将Logo3更换为Logo1
        if (logoSwtich == LogoSwtich.ChangeLogo1)
        {
            logo.GetComponent<Image>().sprite = storeTexture[];
            logoSwtich = LogoSwtich.Start;
        }
    }
　　LogoSwtich logoSwtich = LogoSwtich.Start;
    //Logo图片切换状态
    public enum LogoSwtich
    {
        Start,
        DeleteLogo1Alpha,
        ChangeLogo2,
        AddLogo2Alpha,
        DeleteLogo2Alpha,
        ChangeLogo3,
        AddLogo3Alpha,
        DeleteLogo3Alph,
        ChangeLogo1,
        End
    }

unity中使用Image组件更换Logo图片属性如下：
1、sprite     用来渲染图像的精灵。

2、overrideSprite　　设置用于呈现的覆盖精灵，设置为null将恢复默认的srpite。

unity中使用RawImage组件更换图片属性是  texture  （RawImage的纹理）