【微信小程序】在swiper-item使用wx：for时出现的问题

代码如下：

wxml:

<!--pages/mall/mall.wxml-->
<view class="contianer">
  <view class="swiper">
    <swiper display-multiple-items="{{swiper_pictures.length}}" indicator-dots indicator-color="rgba(0, 0, 0, .3)" indicator-active-color="#ffffff" autoplay current="0" interval="5000" duration="500" circular previous-margin="20rpx" next-margin="20rpx" snap-to-edge="{{true}}" easing-function="easeInOutCubic" >
      <swiper-item wx:for="{{swiper_pictures}}"  wx:for-item="item" item-id="{{item.id}}" skip-hidden-item-layout>
        <image src="{{item.url}}" mode="widthFix" lazy-load show-menu-by-longpress ></image>
      </swiper-item>
    </swiper>
  </view>
</view>

js:

swiper_pictures: [
      {id:"1",alt: "图片1", url: "/static/images/1.png"}, 
      {id:"2",alt: "图片2", url: "/static/images/2.jpg" }, 
      { id: "3", alt: "图片3", url:"/static/images/3.jpg"},
      { id: "4", alt: "图片4", url: "/static/images/4.jpg" },
      { id: "5", alt: "图片5", url: "/static/images/5.jpg" },
      { id: "6", alt: "图片6", url: "/static/images/6.jpg" },
      { id: "7", alt: "图片7", url: "/static/images/7.jpg" },
      { id: "8", alt: "图片8", url: "/static/images/8.jpeg" },
      { id: "9", alt: "图片9", url: "/static/images/9.jpg" },
      { id: "10", alt: "图片10", url: "/static/images/10.jpg" }
      ]

效果如下：

问题：为什么所有的图片都挤到一块去了？

解决办法：display-multiple-items 这个属性是表示在一个swiper-item中同时显示的图片数量，而不是swiper-item的数量。把这个属性去掉就好了