微信小程序实现简单评论功能

<view> 
<button bindtap='showTalks'>查看评论</button> 
</view>
 
 
<!-- 整个评论区 --> 
<view class='talks-layer' animation='{{talksAnimationData}}'>
<!-- 主要作用是点击后隐藏评论区 --> 
<view class='layer-white-space' bindtap='hideTalks'>
</view>
 
 
<!-- 评论区 --> 
<view class='talks' bindtouchstart='touchStart' bindtouchmove='touchMove'> 
<!-- 评论头部 --> 
<view class='talk-header'> 
<view class='talk-count'>{{talks.length}} 条评论</view> 
<image src='../../../images/close.png' class='talk-close' bindtap='hideTalks'></image> 
</view>
 
 
<!-- 评论体 --> 
<scroll-view class='talk-body' scroll-y="true" bindscrolltolower="onScrollLoad"> 
<view class='talk-item' wx:for="{{talks}}" wx:key="*this"> 
<view class='talk-item-left'>
<image class='talk-item-face' src='{{item.avatarUrl}}'></image>
</view>
<view class='talk-item-right'> 
<view class='right-left'> 
<text class='talk-item-nickname'>{{item.nickName}}</text> 
<text class='talk-item-time'>{{item.talkTime}}</text> 
</view> 
<text class='talk-item-content'>{{item.content}}</text>
 
 
</view> 
</view> 
</scroll-view>

 
<!-- 评论底部 --> 
<view class="cf-bg" catchtap="cemojiCfBg" style="display:{{cfBg "></view> 
<view class=" {{isShow "> 
<view class='footer_box'> 
<view class="emoji iconfont icon-emoji" catchtap="emojiShowHide"></view> 
<input class='talk-input' type='text' value='{{inputValue}}' bindblur="bindInputBlur" placeholder='有爱评论，说点儿好听的~'></input> 
<button class='fabu-input' bindtap='faBu'>发布</button> 
</view>
 
<view wx:if='{{isShow}}' class="emoji-box {{isShow "> 
<scroll-view scroll-y="true" bindscroll="emojiScroll" style="height:200px"> 
<block wx:for="{{emojis}}" wx:for-item="e" wx:key=""> 
<view class="emoji-cell">
<image class="touch-active" bindtap="emojiChoose" src="/UploadFiles/2021-04-02/{{e.emoji}}.png">

.wxss


page { 
height: 100%; 
overflow: hidden;
 
}
 
 
 
/* 框架 */

.talks-layer { 
position: absolute; 
bottom: -100%; 
height: 0; 
width: 100%; 
overflow: hidden; 
/* background-color: blue; */
 
}
 

.layer-white-space { 
height: 100%; 
width: 100%; 
background-color: #ccc; 
opacity: 0.5; 
/* background-color: green; */
 
}
 
 
.talks { 
position: absolute; 
height: 900rpx; 
width: 100%; 
bottom: 0rpx; 
background-color: #2f2d2e; 
border-top-left-radius: 3%; 
border-top-right-radius: 3%;
/* background-color: red; */
 
}
 
 
.talk-header { 
width: 100%; 
height: 70rpx; 
padding-top: 30rpx; 
text-align: center; 
}
 
 
.talk-body { 
height: 700rpx; 
}
 
 
.talk-footer { 
position: absolute; 
bottom: 0rpx; 
width: 100%; 
height: 100rpx; 
background-color: #151515; 
display: flex; 
justify-content: space-between; 
align-items: center; 
padding: 0 30rpx; 
box-sizing: border-box;
 
}
 
.footer_boxmovein{
position: absolute; 
bottom: 400rpx; 
width: 100%; 
height: 100rpx; 
z-index:1000; 
background-color: #151515; 
display: flex;
justify-content: space-between; 
align-items: center; 
padding: 0 30rpx; 
box-sizing: border-box; 
transition:all 0.6s;
 
}
 
.footer_box { 
display: flex;
justify-content: space-between;
align-items: center;
width: 100%;
 
}
 
 
 
/* 顶部元素 */ 
.talk-count { 
font-size: 26rpx; 
height: 40rpx; 
color: #6b696a;
}

 
.talk-close {
position: absolute;
top: 30rpx; 
right: 40rpx; 
width: 40rpx; 
height: 40rpx;
 
}
 
 
/* 中部元素 */ 
.talk-item { 
display: flex; 
flex-direction: row; 
align-items: flex-start; 
width: 100%; 
color: white;
 
}
 
 
.talk-item-left { 
display: flex; 
flex-direction: row; 
margin: 20rpx 30rpx; 
}
 
 
.talk-item-face { 
width: 80rpx; 
height: 80rpx;
border-radius: 50%;
 
}
 
 
.talk-item-right { 
width: 100%; 
border-bottom: solid 1rpx #6a6869; 
margin-right: 30rpx; 
/* margin-bottom: 30rpx; */ 
padding-bottom: 20rpx;
 
}
 
 
.right-left { 
display: flex; 
justify-content: space-between; 
align-items: center; 
margin: 10px 0;
 
}
 
 
.talk-item-nickname { 
font-size: 28rpx; 
color: #aaa8a9; 
}
 
 
.talk-item-time { 
font-size: 24rpx; 
color: #6a6869;
 
}
 
 
.talk-item-content {
display: block; 
font-size: 30rpx;
margin-right: 30rpx; 
width: 92%; 
white-space: pre-line; 
word-break: break-all; 
word-wrap: break-word；;
 
}
 
 
 
/* 底部元素 */ 
.talk-input { 
width: 100%; 
font-size: 30rpx; 
padding: 20rpx 0; 
padding-left: 30rpx; 
/* box-sizing: border-box; */ 
color: white; 
border-top-left-radius: 5%;
border-top-right-radius: 5%;
 
}
 

.fabu-input { 
background: red; 
font-size: 26rpx; 
color: #fff;
width: 127rpx; 
height: 60rpx; 
line-height: 60rpx;
text-align: center; 
border-radius: 30rpx; 
padding: 0;
 
}
  
.emoji {
background-color: #fff;
width: 30px; 
height: 30px; 
text-align: center; 
padding-top: 2px;
box-sizing: border-box; 
font-size: 20px;
 
}
 
.emoji-box {
position: absolute; 
bottom:-390rpx; 
left:0rpx; 
height: 200px; 
padding: 5px 16rpx; 
box-sizing: border-box; 
background:#000;
 
} 
 
.emoji-cell { 
width: 9.09%; 
height: 33px; 
display: inline-block;
 
}
 
.emoji-cell image { 
width: 23px;
height: 23px; 
padding: 5px;
border-radius: 3px;
 
}
 
 
.emoji-move-in { 
-webkit-animation: emoji-move-in 0.3s forwards; 
animation: emoji-move-in 0.3s forwards;
 
}
 
.emoji-move-out { 
-webkit-animation: emoji-move-out 0.3s forwards; 
animation: emoji-move-out 0.3s forwards;
 
}
 
 
.no-emoji-move { 
-webkit-animation: none; 
animation: none;
}
 
 
@-webkit-keyframes emoji-move-in { 
0% {
margin-bottom: -200px; 
}
 
100% {
margin-bottom: 0;
 
}
 
}
 
 
@keyframes emoji-move-in { 
0% { 
margin-bottom: -200px;
 
}
 
 
100% { 
margin-bottom: 0; 
}
 
}
 
 
@-webkit-keyframes emoji-move-out { 
0% { 
margin-bottom: 0;
 
} 
100% { 
margin-bottom: -200px;
 
}
 
}
 
@keyframes emoji-move-out { 
0% { 
margin-bottom: 0;
 
} 
 
100% { 
margin-bottom: -200px;
 
}
 
}
 
@-webkit-keyframes pd-left-move { 
0% { 
padding-left: 5px;
 
}
 
100% { 
padding-left: 15px;
 
}
 
} 
 
@keyframes pd-left-move { 
0% { 
padding-left: 5px;
 
} 
 
100% { 
padding-left: 15px;
}
 
}
 
.cf-bg {
position: fixed; 
top: 0; 
left: 0; 
bottom: 0; 
right: 0; 
background-color: transparent; 
z-index: 99;
 
}



.js


Page({
 data: {
 talks: [],
 touchStart: 0,
 inputValue: '',
 inputBiaoqing: '',
 faces: ['https://timgsa.baidu.com/timg"",
 //0x1f---
 emoji: [
  "60a", "60b", "60c", "60d", "60f",
  "61b", "61d", "61e", "61f",
  "62a", "62c", "62e",
  "602", "603", "605", "606", "608",
  "612", "613", "614", "615", "616", "618", "619", "620", "621", "623", "624", "625", "627", "629", "633", "635", "637",
  "63a", "63b", "63c", "63d", "63e", "63f",
  "64a", "64b", "64f", "681",
  "68a", "68b", "68c",
  "344", "345", "346", "347", "348", "349", "351", "352", "353",
  "414", "415", "416",
  "466", "467", "468", "469", "470", "471", "472", "473",
  "483", "484", "485", "486", "487", "490", "491", "493", "498", "6b4"
 ],
 emojis: [], //qq、微信原始表情
 alipayEmoji: [], //支付宝表情
 },
 
 onLoad: function() {
 var em = {},
  that = this,
  emChar = that.data.emojiChar.split("-");
 var emojis = []
 that.data.emoji.forEach(function(v, i) {
  em = {
  char: emChar[i],
  emoji: "0x1f" + v
  };
  emojis.push(em)
 });
 that.setData({
  emojis: emojis
 })
 },
 //解决滑动穿透问题
 emojiScroll: function(e) {
 console.log(e)
 },
 //点击表情显示隐藏表情盒子
 emojiShowHide: function() {
 this.setData({
  isShow: !this.data.isShow,
  isLoad: false,
  cfBg: !this.data.false
 })
 },
 //表情选择
 emojiChoose: function(e) {
 console.log(e)
 //当前输入内容和表情合并
 // let value = e.currentTarget.dataset.emoji;
 this.data.inputBiaoqing += e.currentTarget.dataset.emoji;
 console.log(this.data.inputBiaoqing)
 this.setData({
  inputValue: this.data.inputBiaoqing
 })
 },
 //点击emoji背景遮罩隐藏emoji盒子
 cemojiCfBg: function() {
 console.log('womenlai')
 this.setData({
  isShow: false,
  cfBg: false
 })
 },
 onReady: function() {
 // 评论弹出层动画创建
 this.animation = wx.createAnimation({
  duration: 400, // 整个动画过程花费的时间，单位为毫秒
  timingFunction: "ease", // 动画的类型
  delay: 0 // 动画延迟参数
 })
 },
 showTalks: function() {
 // 加载数据
 this.loadTalks();
 // 设置动画内容为：使用绝对定位显示区域，高度变为100%
 this.animation.bottom("0rpx").height("100%").step()
 this.setData({
  talksAnimationData: this.animation.export()
 })
 },
 
 hideTalks: function() {
 // 设置动画内容为：使用绝对定位隐藏整个区域，高度变为0
 this.animation.bottom("-100%").height("0rpx").step()
 this.setData({
  talks: [],
  talksAnimationData: this.animation.export()
 })
 },
 
 // 加载数据
 loadTalks: function() {
 // 随机产生一些评论
 wx.showNavigationBarLoading();
 let that = this;
 let talks = [];
 let faces = ['https://ss0.bdstatic.com/94oJfD_bAAcT8t7mm9GUKT-xh_/timg"-100%").height("0rpx").step()
  this.setData({
  talks: [],
  talksAnimationData: this.animation.export(),
  })
 }
 },
 //输入框失去焦点时触发
 bindInputBlur: function(e) {
 console.log(e)
 console.log(this.data.inputBiaoqing)
 this.data.inputValue = e.detail.value + this.data.inputBiaoqing;
 },
 //点击发布，发布评论
 faBu: function() {
 let that = this;
 this.data.talks.unshift({
  avatarUrl: this.data.faces[Math.floor(Math.random() * this.data.faces.length)],
  nickName: this.data.names[Math.floor(Math.random() * this.data.names.length)],
  content: this.data.inputValue,
  talkTime: '刚刚'
 })
 that.data.inputValue = '';
 that.setData({
  talks: that.data.talks,
  inputValue: that.data.inputValue,
  talksAnimationData: that.animation.export()
 })
 
 }
})


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