unity之截屏方法

截屏大概步骤 是首先读取屏幕的像素信息，然后保存为Texture2D，最后保存为图片；

        private Texture2D picture;

private string fileName;

private string filePath;

public void ScreenCapture()

{

StartCoroutine (SavePicture());

}

IEnumerator SavePicture()

{

//只在每一帧渲染完成后才读取屏幕信息

yield return new WaitForEndOfFrame ();

//实例化

picture = new Texture2D (Screen.width, Screen.height);

//读取屏幕像素信息并存储为纹理数据

picture.ReadPixels (new Rect (0, 0, Screen.width, Screen.height), 0, 0);

// 这一句必须有，像素信息并没有保存在2D纹理贴图中

picture.Apply ();

//读取将这些纹理数据,成一个jpg图片文件

byte[] bytes = picture.EncodeToJPG ();

fileName =  DateTime.Now.ToFileTime ().ToString () + ".jpg";

filePath = Application.persistentDataPath + "卫星" + fileName;

Debug.Log (filePath);

//写入文件 并且指定路径，

File.WriteAllBytes (filePath, bytes);

Debug.Log("打印完成!!!!!!!!!!!");

}