[转载]Unity3d三种截屏方法

转载地址：http://www.manew.com/blog-87668-3200.html

第一种截屏方法：

    /// <summary>

    /// 使用Unity API中的CaptureScreenshot截屏方法 

    /// </summary>

    public void CaptureScreen()

    {

        Application.CaptureScreenshot("截取全屏.png", 0);

    }

第二种截屏方法：    

     /// <summary>

    /// 自定义截图大小其中包含UI

    /// </summary>

    public Texture2D CaptureScreen(Rect rect)

    {

        Texture2D screenShot = new Texture2D((int)rect.width, (int)rect.height, TextureFormat.RGB24, false);

        screenShot.ReadPixels(rect, 0, 0);

        screenShot.Apply();

        byte[] bytes = screenShot.EncodeToPNG();

        string filename = Application.dataPath + "/ScreenShot.png";

        System.IO.File.WriteAllBytes(filename, bytes);

        return screenShot;

    }

第三种截屏方法：

    /// <summary>

    /// 针对不同的相机进行截图，可以把UI和游戏分开

    /// </summary>

    /// <param name="c"></param>

    /// <param name="r"></param>

    /// <returns></returns>

    public Texture2D CaptureScreen(Camera c, Rect r)

    {

        RenderTexture rt = new RenderTexture((int)r.width, (int)r.height, 0);

        c.targetTexture = rt;

        c.Render();

        RenderTexture.active = rt;

        Texture2D screenShot = new Texture2D((int)r.width, (int)r.height, TextureFormat.RGB24, false);

        screenShot.ReadPixels(r, 0, 0);

        screenShot.Apply();

        c.targetTexture = null;

        RenderTexture.active = null;

        GameObject.Destroy(rt);

        byte[] bytes = screenShot.EncodeToPNG();

        string filename = Application.dataPath + "/ScreenShot.png";

        System.IO.File.WriteAllBytes(filename, bytes);

        return screenShot;

    }