unity实现截屏功能

好讨厌说废话，直接来吧

unity的小功能，实现截屏功能

大致分三种：

1.针对指定的相机进行截屏

  public Texture2D CaptureScreen(Camera came, Rect r)
    {
        RenderTexture rt = new RenderTexture((int)r.width, (int)r.height, 0);

        came.targetTexture = rt;
        came.Render();

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

        screenShot.ReadPixels(r, 0, 0);
        screenShot.Apply();

        came.targetTexture = null;
        RenderTexture.active = null;
        GameObject.Destroy(rt);

        byte[] bytes = screenShot.EncodeToPNG();
        string filename = Application.streamingAssetsPath + "/ScreenShot.png";
        System.IO.File.WriteAllBytes(filename, bytes);

        return screenShot;
    }

　　

2.自定义截图的大小（包括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.streamingAssetsPath + "/ScreenShot.png";
        System.IO.File.WriteAllBytes(filename, bytes);

        return screenShot;
    }

　　

3.截取屏幕全屏

 public void CapruerScreen()
    {
        // Application.CaptureScreenshot(Application.persistentDataPath + "ScreenShot.png", 0);//过时的方法
        ScreenCapture.CaptureScreenshot( Application.streamingAssetsPath + "/ScreenShot.png", 0);       
    }

　　

个人觉得这三种已经满足需求了，所以就到这。