UGUI Image 动态更换纹理图片

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;


public class UIShop : View
{
    #region 常量
    #endregion

    #region 事件
    #endregion

    #region 字段
    public int selectIndex = 0;//选择
    public MeshRenderer ball;//足球材质

    public ItemState state = ItemState.UnBuy;//装备状态
    GameModel gm;
    //图片资源
    public Sprite spBuy; //已购买图片
    public Sprite spEquip; //已装备图片
    public Image imgBuyFootBall;//持有按钮图片
    #endregion

    #region 属性
    public override string Name
    {
        get
        {
            return Consts.V_Shop;
        }
    }
    #endregion

    #region 方法
    #region 足球
    public void NormalFootBall()
    {
        selectIndex = 0;
        ball.material = Game.Instance.staticData.GetFootballInfo(selectIndex).Material;
        UpdateBuyButton(selectIndex);
    }
    public void FireFootBall()
    {
        selectIndex = 1;
        ball.material = Game.Instance.staticData.GetFootballInfo(selectIndex).Material;
        UpdateBuyButton(selectIndex);
    }
    public void ColorFootBall()
    {
        selectIndex = 2;
        ball.material = Game.Instance.staticData.GetFootballInfo(selectIndex).Material;
        UpdateBuyButton(selectIndex);
    }
    //更新按钮显示
    public void UpdateBuyButton(int i)
    {
        state = gm.CheckFootBallState(i);
        switch (state)
        {
            case ItemState.UnBuy://未购买
                imgBuyFootBall.transform.gameObject.SetActive(true);
                imgBuyFootBall.overrideSprite = spBuy;//按钮图片显示购买
                break;
            case ItemState.Buy://已购买
                imgBuyFootBall.transform.gameObject.SetActive(true);
                imgBuyFootBall.overrideSprite = spEquip;//按钮图片显示装备
                break;
            case ItemState.Equip://已装备
                imgBuyFootBall.transform.gameObject.SetActive(false);
                break;
            default:
                break;
        }
    }
    #endregion
    #endregion

    #region Unity回调
    private void Awake()
    {
        gm = GetModel<GameModel>();
    }
    #endregion

    #region 事件回调
    public override void HandleEvent(string name, object data)
    {
    }
    #endregion

    #region 帮助方法
    #endregion

    

   
}