微信小程序实现预览图片功能

<view class='contentbot'>
  <view class='contentWa' wx:key='id' wx:for='{{wawa}}'>
  <image src='{{item.img_url}}' mode='widthFix' data-src='{{item.img_url}}' bindtap='previewImage'></image>
   <text class='waName'>{{item.name}}</text>
  </view>
</view>

.contentWa {
 margin-top: 20rpx;
 display: flex;
 flex-direction: column;
 justify-content: flex-start;
}
.contentWa image {
 margin: 0;
 padding: 0;
 width: 100%;
}
.getWa{
 display: flex;
 flex-direction: row;
 justify-content: space-between;
}
.waName {
 width: 100%;
 height: 80rpx;
 line-height: 80rpx;
 font-size: 30rpx;
 text-align: center;
 background: #fff;
 display: inline-block;
}

//预览图片
 previewImage: function (e) {
  var current = e.target.dataset.src;
  var imgList = [];
  for (let i = 0; i < this.data.wawa.length; i++) {
   imgList.push(this.data.wawa[i].img_url);
  }
  wx.previewImage({
   current: current,//当前点击的图片链接
   urls: imgList//图片数组
  })
 },