wxml中

        <view
          wx:for="{{detailImageList}}"
          wx:for-item="item"
          wx:for-index="index"
          wx:key="index"
          data-url="{{detailImageList[index]}}"
          catchtap="ViewImgPop"
          data-index="{{index}}"
          class="product-picture-item"
        >
          <image class="product-picture-img" src="{{detailImageList[index]}}" mode="aspectFill"></image>
          <view class="product-item-close" data-index="{{index}}" catchtap="handleRemove">
            <image class="img-close" src="https://akim-oss.aikucun.com/b2cf17403df560247ff69f9fe21289289f05867c_1690962353673_60.png"></image>
          </view>
        </view>

        <view class="chooseimage" catchtap="addMoreImg" wx:if="{{detailImageList.length<imgMaxNumber}}"> <view class="addWord">添加图片</view></view>
      </view>

重点！！
js
添加图片
①图片一次选择多个，e.detail为数组
②每次url数据需要判断原先imglist是否已有url，如有需要拼接到数组中
③判断filetype是否都为image（调用的组件也可以过滤只显示图片）

 async handleAddImg(e) {
    const imgList = this.data.detailImageList;
    let resImg = [];
    const arr = e.detail;
    const newArr = arr.map((item) => item?.url);
    const isImg = arr.every((item) => item?.fileType === 'image');
    if (isImg) {
      if (!imgList || imgList.length === 0) {
     //不加!imgList报错，因为可能不为数组无法获取length
        resImg = newArr;
      } else {
        resImg = imgList.concat(newArr);
      }
      this.setData({ detailImageList: resImg });
    } else {
      // wx.showToast({
      //   title: '请上传图片',
      //   icon: 'none',
      // });
    }
  },

删除图片

handleRemove(e) {
    this.data.detailImageList.splice(e.currentTarget.dataset.index, 1);
    this.setData({
      detailImageList: this.data.detailImageList,
    });
  },

替换视频

replaceImage(e) {
    let resImg = this.data.detailImageList;
    resImg[this.data.currentImgId] = e.detail;
    this.setData({
      detailImageList: resImg,
    });
  },

限制最大张数
记录当前张数，maxImageNumber-currentImageNumber

上传视频同理，但要加一张封面url

const thumbnail = `${e.detail[0].url}?vframe/jpeg/offset/1/w/${videoCoverWidth}/h/${videoCoverHeight}`;