需求：留言可以点赞，点过赞之后图标变化，没人只能点赞一次，留言可以在留言

index.wxml

<view class='liuyanbox'>
 <view class='ly-title clear'>
 <view class='llt-left fl'>邻居评论（{{yanlist.count}}）</view>
 <view class='llt-right fr' data-id="0" data-user="{{list.user_id}}" bindtap='liuynChange'>我要留言</view>
 </view>
 <view>
 <view class='xunhuan' wx:for="{{yanlist.list}}">
 <view class='zuobianll'>
 <view class='ll-content clear'>
 <view class='llc-touxiang fl'>
 <image class='llc-image' src='{{item.avatar}}'></image>
 </view>
 <view class='llc-nall fl clear'>
 <view class='clear'>
 <view class='llc-name fl'>{{item.nick_name}}</view>
 <view class='llc-time fl'>{{item.create_date}}</view>
 </view>
 <view class='ll-lynr'>
 <text space="emsp" class='ll-trxt'>{{item.content}}</text>
 </view>
 </view>
 </view>
 <view class='haz clear'>
 <view class='fr huifu'>
 <image class='hf-img' data-id="{{item.id}}" data-user="{{item.user_id}}" bindtap='liuynChange' src='https://jpadmin.99dudesign.com/public/img/source/btn_icon_huifu.png'></image>
 </view>
 <view class='fr dianzan clear'>
 <!-- <image class='dzimg fl' src='https://jpadmin.99dudesign.com/public/img/source/btn_icon_zhendianzan.png' data-id="{{item.id}}" bindtap='llzanChange'></image> -->
 <view class='dzimg fl {{item.lldzView?"dzimg2":"nodzimg2"}}' data-id="{{item.id}}" bindtap='llzanChange'></view>
 <view class='dz-num fl' data-text="{{item.like_count}}">{{item.like_count}}</view>
 </view>
 </view>
 </view>
 <view class='one-huiwo' wx:if="{{item._child}}!=null" wx:for="{{item._child}}">
 <view class='hw-top clear'>
 <view class='htop-tx fl'>
 <image class='htptx-img' src='{{item.avatar}}'></image>
 </view>
 <view class='htop-you fl '>
 <view class='htop-name clear '>
 <view class='fl hh-name'>{{item.nick_name}}</view>
 <view class='fl hh-time'>{{item.create_date}}</view>
 </view>
 <view class='htop-content '>
 <text class='' space="emsp">{{item.content}}</text>
 </view>
 </view>
 </view>
 <view class='htop-dz clear'>
 <view class='fr hhdznum' data-text="{{item.like_count}}">{{item.like_count}}</view>
 <view class='fr dz {{item.cnmView?"dzimg2":"nodzimg2"}}' data-id="{{item.id}}" bindtap='llzanChangeTwo'></view>
 </view>
 </view>
 </view>
 </view>
</view>
<!-- 留言 -->
<view class='zhegai hide {{llbView?"block":""}}' bindtap='llbquxiao'></view>
<view class='liuyanban hide {{llbView?"block":""}}'>
<view class='liuybtitle'>留言</view>
<textarea class='shuruk' value="{{llbcontent}}" bindinput="llbInput"></textarea>
<view class='qandq clear'>
<view class='quxiao fl' bindtap='llbquxiao'>取消</view>
<view class='queding fl' bindtap='llbChange'>确定</view>
</view>
</view>

主要的wxss代码（用于点赞的展示，实现小手、空心小手）

.nodzimg2 {
 background: url(空心);
 background-size: 100%;
}
 
.dzimg2 {
 background: url(实心);
 background-size: 100%;
}

js

var liuynfun = function (that) {
 wx.request({
 url: getApp().data.host + '...',
 method: "POST",
 data: {
 "column": "Routine",
 "row_id": that.data.url
 },
 header: {
 'content-type': 'application/x-www-form-urlencoded'
 },
 success: function (res) {
 if (res.data.list != "") {
 //第一行留言
 for (var i in res.data.list) {
 res.data.list[i].lldzView = false;
 if (res.data.list[i].like_user != null) {
 if (res.data.list[i].like_user.indexOf(wx.getStorageSync('user_id')) != "-1") {
 res.data.list[i].lldzView = true
 }
 }
 // 第二行留言
 if (res.data.list[i]._child){
 for (var j in res.data.list[i]._child){
 res.data.list[i]._child[j].cnmView=false
 if (res.data.list[i]._child[j].like_user != null) {
 if (res.data.list[i]._child[j].like_user.indexOf(wx.getStorageSync('user_id')) != "-1") {
 res.data.list[i]._child[j].cnmView = true
 }
 }
 }
 }
 }
 
 }
 that.setData({
 yanlist: res.data
 })
 }
 })
}

从后台传过来的数据

留言里面的留言

js

点击我要留言

liuynChange: function (e) {
 var that = this;
 console.log(e.currentTarget.dataset.id)
 that.setData({
 llbView: true,
 pid: e.currentTarget.dataset.id,
 to_user_id: e.currentTarget.dataset.user
 })
 },

留言点赞

llzanChangeTwo: function (e) { 
 console.log(e) 
 var that = this; 
 wx.request({ 
 url: getApp().data.host + '...', 
 method: "POST", 
 data: { 
 "column": "Reply", 
 "user_id": wx.getStorageSync('user_id'), 
 "id": e.currentTarget.dataset.id 
 }, 
 header: { 
 'content-type': 'application/x-www-form-urlencoded' 
 }, 
 success: function (res) { 
 var data = that.data.yanlist 
 console.log(data) 
 if (res.data != null) { 
 if (res.data.indexOf(wx.getStorageSync('user_id')) == "-1") { 
 for (var i in data.list) { 
 if (data.list[i]._child) { 
 for (var j in data.list[i]._child) { 
 if (e.currentTarget.dataset.id == data.list[i]._child[j].id) { 
 data.list[i]._child[j].cnmView=true 
 data.list[i]._child[j].like_count = parseInt(data.list[i]._child[j].like_count) + 1 
 } 
 } 
 } 
 } 
 that.setData({ 
 yanlist: data 
 }) 
 } 
 } else { 
 for (var i in data.list) { 
 if (data.list[i]._child) { 
 for (var j in data.list[i]._child) { 
 if (e.currentTarget.dataset.id == data.list[i]._child[j].id) { 
 data.list[i]._child[j].cnmView = true 
 data.list[i]._child[j].like_count = parseInt(data.list[i]._child[j].like_count) + 1 
 } 
 } 
 } 
 } 
 that.setData({ 
 yanlist: data 
 }) 
 } 
 } 
 }) 
 },

点赞返回的为点赞人的id

其中所得View初始化全部为false