Unity 三种截屏方式

/// 

    /// 截取全屏的方法包括UI
    /// 
    public void CaptureScreen()
    {
        Application.CaptureScreenshot("截取全屏.png", 0);
        Debug.Log(1);
    }

    /// 

    /// 自定义截图大小其中包含UI
    /// 
    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;
    }

    /// 

    /// 针对不同的相机进行截图，可以把UI和游戏分开
    /// 
    /// 
    /// 
    /// 
    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;
    }