源代码

  <view class="swiper" wx:if="{{bannerList}}">

    <swiper indicator-dots="{{indicatorDots}}" autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}" style="height: 400rpx">

      <swiper-item wx:for="{{bannerList}}" wx:key="index">

        <image src="{{item}}" mode="aspectFill" style="width: 100%; height: 400rpx; display: block; margin: 0 auto" binderror="imageError" bindtap="previewImage"></image>

      </swiper-item>

    </swiper>

  </view>

  <view class="swiper" wx:if="{{!bannerList}}">

    <swiper style="height: 400rpx">

      <swiper-item>

        <image src="https://wgzs.qmkjzh.com/file/statics/2025/12/11/gKiahFzQDJqha09ef04951902651756ba7ccfb3da213_20251211175932A717.png" mode="aspectFill" style="width: 100%; height: 400rpx; display: block; margin: 0 auto"></image>

      </swiper-item>

    </swiper>

  </view>

修改后的代码

  <view class="swiper" wx:if="{{bannerList && bannerList.length > 0}}">

    <swiper indicator-dots="{{indicatorDots}}" autoplay="{{autoplay}}" interval="{{interval}}" duration="{{duration}}" style="height: 400rpx">

      <swiper-item wx:for="{{bannerList}}" wx:key="index">

        <image src="{{item}}" mode="aspectFill" style="width: 100%; height: 400rpx; display: block; margin: 0 auto" binderror="imageError" bindtap="previewImage"></image>

      </swiper-item>

    </swiper>

  </view>

  <view class="swiper" wx:else>

    <swiper style="height: 400rpx">

      <swiper-item>

        <image src="https://wgzs.qmkjzh.com/file/statics/2025/12/11/gKiahFzQDJqha09ef04951902651756ba7ccfb3da213_20251211175932A717.png" mode="aspectFill" style="width: 100%; height: 400rpx; display: block; margin: 0 auto"></image>

      </swiper-item>

    </swiper>

  </view>