当swiper-slide过多时，页面会非常卡顿，用户体验差，优化方式如下：
<swiper circular
@change="swiperChange"
ref="myNoCompleteSwiper"
:options="NoCompleteSwipeOptions"
class="NoCompletesSiper">
<swiper-item
v-for="(item, inx) in noCompleteUnitData" :key="inx" class="swiperslide swiper-slide">
<!---你的渲染内容-->
</swiper-item>
</swiper>
将swiper-slide 改成swiper-item,在swiper-item加上calss="swiper-slide"就能避免初始化时swiper-slide过多造成页面卡顿问题
