小程序之点击图片放大预览

<view class=‘footer‘ wx:for="{{imgArr}}">
    <image class=‘showImg‘ src=‘{{item}}‘ data-index=‘{{index}}‘ bindtap=‘bindClickImg‘></image>
</view>

Page({
  data: {
    "imgArr":[
      ‘http://a4.qpic.cn/psb?/V107e1iy3TMhxe/JtR7nCgfLLN82Wz8ALs.oOeBhSp9NfFRVep9Wzj7O00!/m/dB8BAAAAAAAAnull&bo=HQIsAwAAAAAFBxQ!&rf=photolist&t=5‘,
      ‘http://a1.qpic.cn/psb?/V107e1iy3TMhxe/qvgB6hS87vD676lwm7ezLGqwzJ2WG6Kbd1EozFIi9t4!/m/dDwBAAAAAAAAnull&bo=gAJxBAAAAAARB8c!&rf=photolist&t=5‘,
      ‘http://a3.qpic.cn/psb?/V107e1iy3TMhxe/btyuqQXjEzUQlJSY07IbXnWmTGTl6X2inxhcVV*NEKk!/m/dOIAAAAAAAAAnull&bo=gAJyBAAAAAARB8Q!&rf=photolist&t=5‘
    ]
  },
  //事件处理函数
  bindClickImg:function(e){
    var selecIndex = e.currentTarget.dataset.index
    var imageArr = this.data.imgArr
    wx.previewImage({
      current: imageArr[selecIndex],  // 当前显示图片的http链接，注意这里不能放本地图片
      urls: imageArr,                 // 需要预览的图片http链接列表，注意这里不能放本地图片
      success: function (res) { },
      fail: function (res) { },
      complete: function (res) { },
    })
  }
})

.footer{width: 100%;}
.showImg{width: 600rpx;height: 400rpx;}