using UnityEngine;using System.Collections;public class SpriteAtlasTest : MonoBehaviour {    private UISprite _sprite;    public UIAtlas atlas;    public UIAtlas atlas2;    // Use this for initialization    void Start () {        _sprite = GetComponent<UISprite>();    }        // Update is called once per frame    void Update () {               if(Input.GetMouseButtonDown(0))        {            _sprite.atlas = atlas;            _sprite.spriteName = "GoodDirt";                               }        if(Input.GetMouseButtonDown(1))        {            _sprite.atlas = atlas2;            _sprite.spriteName = "NGUI";        }    }}