Comment faire défiler des images dans un petit programme

<!--pages/test/test.wxml-->
<!-- 组件 -->
<swiper>
  <swiper-item wx:for="{{imgUrls}}">
    <image src=&#39;{{item}}&#39; width="335" height="150" mode=&#39;widthFix&#39; class=&#39;img&#39; />
  </swiper-item>
</swiper>

// pages/test/test.js
Page({
  data: {
    imgUrls:[
      'http://dl.bizhi.sogou.com/images/1440x900/2014/05/14/611368.jpg',
      'http://dl.bizhi.sogou.com/images/1440x900/2013/10/19/394877.jpg',                'http://img04.sogoucdn.com/app/a/100520093/ca86e620b9e623ff-d72d635343d5bade-dcf2acda7a45cb44f172db138bdf8d2d.jpg',
    ]
  },
  //事件处理函数
  toupper:function(){
    console.log("触发了toupper");
  }
})

.img{
 width: 100%;
}