Unity程序框内，鼠标操作失灵

Unity程序框内，鼠标操作失效

//定义运行区域为屏幕，如果鼠标出屏幕则停止运行
? ?? ???Rect screenRect = new Rect(0,0,Screen.width,Screen.height);
? ?? ???if( !screenRect.Contains(Input.mousePosition)) return;