如何在Unity中通过脚本更改Sprite的Alpha

Question

我有4个按钮，当按下按钮时，每个按钮都会闪烁。 但是，如果您要按一个按钮，则当该按钮变暗（闪烁）时，请单击另一个按钮，然后该按钮将保持黑暗。 我想在禁用精灵之前重设精灵的颜色，但是它不起作用。 当按下按钮时，它们不再闪烁...。

这是代码：

void Start () {
        easy.GetComponent<SpriteRenderer>().color = color;
    }

    void Update () {
        if(difficultySelected[0] == true){
            enemyBehavior.shotsPerSecond = 0.2f;
            //Enabling the selected button
            easy.enabled = true;

            //Reseting the colors
            normal.GetComponent<SpriteRenderer>().color = color;
            hard.GetComponent<SpriteRenderer>().color = color;
            expert.GetComponent<SpriteRenderer>().color = color;

            //Disabling the 'unselected' buttons
            normal.enabled = false;
            hard.enabled = false;
            expert.enabled = false;

            easy.Play("Difficulty");
        }else if(difficultySelected[1] == true){
            enemyBehavior.shotsPerSecond = 0.5f;
            normal.enabled = true;

            easy.GetComponent<SpriteRenderer>().color = color;
            hard.GetComponent<SpriteRenderer>().color = color;
            expert.GetComponent<SpriteRenderer>().color = color;

            easy.enabled = false;
            hard.enabled = false;
            expert.enabled = false;

            normal.Play("Difficulty");
        }else if(difficultySelected[2] == true){
            enemyBehavior.shotsPerSecond = 1;
            hard.enabled = true;

            easy.GetComponent<SpriteRenderer>().color = color;
            normal.GetComponent<SpriteRenderer>().color = color;
            expert.GetComponent<SpriteRenderer>().color = color;

            easy.enabled = false;
            normal.enabled = false;
            expert.enabled = false;

            hard.Play("Difficulty");
        }else if(difficultySelected[3] == true){
            enemyBehavior.shotsPerSecond = 2;
            expert.enabled = true;

            easy.GetComponent<SpriteRenderer>().color = color;
            normal.GetComponent<SpriteRenderer>().color = color;
            hard.GetComponent<SpriteRenderer>().color = color;

            easy.enabled = false;
            normal.enabled = false;
            hard.enabled = false;

            expert.Play("Difficulty");
        }
    }

Answer 1

你可以写：

color.a = 1f; // value between 0 and 1, where 1 is opaque

//Resetting the colors
normal.GetComponent<SpriteRenderer>().color = color;
hard.GetComponent<SpriteRenderer>().color = color;
expert.GetComponent<SpriteRenderer>().color = color;