Unity：使用Texture2D动态创建的图像无法正常显示 / 修改图像后未生效

开发中遇到需要动态绘制图像的需求，前后文代码如下所示：

Texture2D newImageTexture = new Texture2D(width, height);
Color32[] newImagePixels = new Color32[height * width];for (int y = 0; y < height ; ++y)
{for (int x = 0; x < width; ++x){if (...){newImagePixels[y * width + x] = new Color32(0, 0, 0, 0);}else{if (...){newImagePixels[y * width + x] = new Color32(255, 0, 0, 255);}else{newImagePixels[y * width + x] = new Color32(255, 255, 255, 255);}}}
}newImageTexture.SetPixels32(newImagePixels);
Sprite sprite = Sprite.Create(newImageTexture, new Rect(0.0f, 0.0f, width, height), new Vector2(0.5f, 0.5f));gameObject.GetComponent<Image>().sprite = sprite;

但是经过测试，图像并没有被正常显示出来。经过查阅官方文档，调用SetPixels32后必须调用Apply函数把修改上传到显卡中才能生效（参考链接），因此正确代码如下：

Texture2D newImageTexture = new Texture2D(width, height);
Color32[] newImagePixels = new Color32[height * width];for (int y = 0; y < height ; ++y)
{for (int x = 0; x < width; ++x){if (...){newImagePixels[y * width + x] = new Color32(0, 0, 0, 0);}else{if (...){newImagePixels[y * width + x] = new Color32(255, 0, 0, 255);}else{newImagePixels[y * width + x] = new Color32(255, 255, 255, 255);}}}
}newImageTexture.SetPixels32(newImagePixels);
//加入这句
newImageTexture.Apply(false);
//
Sprite sprite = Sprite.Create(newImageTexture, new Rect(0.0f, 0.0f, width, height), new Vector2(0.5f, 0.5f));gameObject.GetComponent<Image>().sprite = sprite;

另外，经过测试，这样创建的Sprite有时候会莫名其妙灰蒙蒙的，像是被遮罩了。经过测试，加上Instantiate可以解决，但原因未知：

gameObject.GetComponent<Image>().sprite = Instantiate(sprite);