官方文档：https://developers.weixin.qq.com/miniprogram/dev/component/swiper.html

  <swiper indicator-color="ivory" indicator-active-color="#d43c33" indicator-dots autoplay><swiper-item><image src="/images/banner1.png" mode=""/></swiper-item><swiper-item><image src="/images/banner2.png" mode=""/></swiper-item></swiper>

swiper{height: 480rpx;
}
swiper-item image{width: 100%;height: 100%;
}