IEnumerator SaveImageEnd()
{
yield return new WaitForEndOfFrame ();
Rect rect = new Rect (Screen.width*0f, Screen.height*0f, Screen.width*1f, Screen.height*1f);
// 先创建一个的空纹理，大小可根据实现需要来设置
Texture2D screenShot = new Texture2D((int)rect.width, (int)rect.height, TextureFormat.RGB24,false);
// 读取屏幕像素信息并存储为纹理数据，
screenShot.ReadPixels(rect, 0, 0);
screenShot.Apply();
// 然后将这些纹理数据，成一个png图片文件
// byte[] bytes = screenShot.EncodeToPNG();
// string filename = Application.dataPath + "/Screenshot.png";
// System.IO.File.WriteAllBytes(filename, bytes);
// Debug.Log(string.Format("截屏了一张图片: {0}", filename));
screenShot.SaveToAlbum();
UIManager.instance.gameObject.SetActive (true);
}