如果把van-swipe-item写成for循环，内部的van-image标签无法使用本地图片，解决办法：
1.把van-image标签换成img，去掉for循环的使用

<van-swipe :loop="false" @change="onChange">
        <van-swipe-item>
          <img src="../../assets/bggold.png" alt />
          <div class="goldcard cardbox" v-if="!(cardLevel==8)">
            <div class="cardtit">
              <img src="../../assets/gold1.png" alt />
              <p>金会员</p>
            </div>
            <p class="cardstaus">未开通</p>
            <p class="cardadv">¥100购卡礼 X 专属特权</p>
            <p class="cardredu">首单立减¥30</p>
          </div>
          <div class="goldcard cardbox vipcard" v-if="cardLevel==8">
            <img class="userhead" :src="customInfo.avatarUrl||defaultIcon" alt />
            <div class="userInfo">
              <p class="username">{{customInfo.truename||defaultName}}</p>
              <p class="usertype">
                <img src="../../assets/gold1.png" alt /> 金会员
              </p>
              <div class="deadline">{{endtime}}到期</div>
            </div>
            <!-- <div class="record flexall">购卡记录</div> -->
            <div class="cardNo">{{customInfo.cardNo}}</div>
          </div>
        </van-swipe-item>
        <van-swipe-item>
          <img src="../../assets/bgsilver.png" alt />
          <div class="silvercard cardbox" v-if="!(cardLevel==5)">
            <div class="cardtit">
              <img src="../../assets/nogold.png" alt />
              <p>银会员</p>
            </div>
            <p class="cardstaus">未开通</p>
            <p class="cardadv">¥50购卡礼 X 专属特权</p>
            <p class="cardredu">首单立减¥30</p>
          </div>
          <div class="goldcard cardbox vipcard" v-if="cardLevel==5">
            <img class="userhead" :src="customInfo.avatarUrl||defaultIcon" alt />
            <div class="userInfo">
              <p class="username">{{customInfo.truename||defaultName}}</p>
              <p class="usertype">
                <img src="../../assets/gold1.png" alt /> 银会员
              </p>
              <div class="deadline">{{endtime}}到期</div>
            </div>
            <!-- <div class="record flexall">购卡记录</div> -->
            <div class="cardNo">{{customInfo.cardNo}}</div>
          </div>
        </van-swipe-item>
        <van-swipe-item>
          <img src="../../assets/bgnormal.png" alt />
          <div class="commoncard cardbox" v-if="!(cardLevel==1)">
            <div class="cardtit">
              <img src="../../assets/nogold.png" alt />
              <p>普通会员</p>
            </div>
            <p class="cardstaus">长期有效</p>
          </div>
          <div class="commoncard cardbox vipcard" v-if="cardLevel==1">
            <img class="userhead" :src="customInfo.avatarUrl||defaultIcon" alt />
            <div class="userInfo">
              <p class="username">{{customInfo.truename||defaultName}}</p>
              <p class="usertype">
                <img src="../../assets/nogold.png" alt /> 普通会员
              </p>
              <div class="deadline">长期有效</div>
            </div>
            <div class="cardNo">{{customInfo.cardNo}}</div>
          </div>
        </van-swipe-item>
      </van-swipe>

2.img用src引用图片变量，在图片的链接外包上一层 require（）

<van-swipe :autoplay="3000" >
   <van-swipe-item v-for="(image, index) in imageList" :key="index">
     <img :src="image" style="width:100%;height:150px;" />
   </van-swipe-item>
 </van-swipe>

data () {
    return {
      isShow:false,
      pingan:"",
      times:"",
      content:{title: '填报须知',content: '欢迎ssss'},
      imageList: [
        require('../../../static/images/1.png'),
        require('../../../static/images/2.png'),
        require('../../../static/images/3.jpg'),
      ],
    active:1,
    notificationList:[]
    }
  }

参考：https://blog.csdn.net/qq_43542074/article/details/100537554