<swiper indicator-dots="true">
    <block wx:for="{{imgs}}" wx:for-index="index">
     <swiper-item class="swiper-items" >
      <image class="swiper-image" src="{{item}}"></image>
      <button class="button-img" bindtap="start" wx:if="{{index == imgs.length - 1}}" >立即体验</button>
     </swiper-item>
    </block>
  </swiper>

    Page({
    data:{
      imgs:[
        "http://img.kaiyanapp.com/5edbf92b929f9174e3b69500df52ee21.jpeg?imageMogr2/quality/60",
        "http://img.kaiyanapp.com/f2c497cb520d8360ef2980ecd0efdee7.jpeg?imageMogr2/quality/60",
        "http://img.kaiyanapp.com/64f96635ddc425e3be237b5f70374d87.jpeg?imageMogr2/quality/60",
      ],

      img:"http://img.kaiyanapp.com/7ff70fb62f596267ea863e1acb4fa484.jpeg",
    },

    start(){
       wx.navigateTo({
        url: '../home/home'
      })
      // wx.redirectTo({ url: '../index/index' })
    },


   })

  swiper {
   /*这个是绝对布局*/
   position: absolute;
   height: 100%;
   width: 100%;
  }


  .swiper-image {
   height: 100%;
   width: 100%;
   /*透明度*/
   opacity:0.9;
  }


  .button-img{  
    /*这个是绝对布局*/
    position: relative;
    bottom: 90px;
    height: 40px;
    width: 120px;
    opacity:0.6;
  }