小程序-swiper-item点击事件

index.wxml

  <swiper class="banner"  catchtap="onItemClick">    <block wx:for="{{dataList}}">      <swiper-item>        <image src="{{item.img}}" class="slide-image"  data-postId="{{item.id}}" />      </swiper-item>    </block>  </swiper>

index.js

  /**   * 页面的初始数据   */  data: {    dataList:[      { id: 1, img:"http://img02.tooopen.com/images/20150928/tooopen_sy_143912755726.jpg"},      { id: 2, img: "http://img06.tooopen.com/images/20160818/tooopen_sy_175866434296.jpg" },      { id: 3, img: "http://img06.tooopen.com/images/20160818/tooopen_sy_175833047715.jpg" },    ]  },  onItemClick:function(event){      wx.showToast({        title: event.target.dataset.postid+"",      })  },