实现

截屏

Texture2D texture = new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);
texture.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
texture.Apply();

存储 

byte[] array = ImageConversion.EncodeToPNG(texture);
if (!Directory.Exists(filePath))
{
    Directory.CreateDirectory(filePath);
}
File.WriteAllBytes(filePath + "/" + fileName, array);

问题 

ReadPixels was called to read pixels from system frame buffer, while not inside drawing frame.

直接使用截屏会出错，可使用协程或在OnPostRender 中处理来解决，具体参见链接文章。

截屏 ReadPixels was called to read pixels from system frame buffer, while not inside drawing frame. - 简书 (jianshu.com)https://www.jianshu.com/p/460803bbd5a9