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// Update is called once per frame	void Update ()	{		Ray ray = UICamera.mainCamera.ScreenPointToRay (UICamera.mainCamera.WorldToScreenPoint(transform.position));// 向屏幕发射线		RaycastHit hit;		Debug.DrawLine(UICamera.mainCamera.transform.position,gameObject.transform.position,Color.blue);		// 射线的碰撞检测		if (Physics.Raycast (ray, out hit,200)) {			print ("点到NGUI");			Debug.Log(hit.collider.name);		}		Debug.Log(transform.position);	}

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