怎么在微信小程序中实现评论功能

<view> <button bindtap='showTalks'>查看评论</button> </view>  <view class='talks-layer' animation='{{talksAnimationData}}'>  <view class='layer-white-space' bindtap='hideTalks'> </view>  <view class='talks' bindtouchstart='touchStart' bindtouchmove='touchMove'>  <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>  <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>  <view class="cf-bg" catchtap="cemojiCfBg" ></view> <view class=" {{isShow ?'footer_boxmovein' : 'talk-footer'}}"> <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 ? 'emoji-move-in' : 'emoji-move-out'}} {{isLoad ? 'no-emoji-move' : ''}}"> <scroll-view scroll-y="true" bindscroll="emojiScroll" > <block wx:for="{{emojis}}" wx:for-item="e" wx:key=""> <view class="emoji-cell"> <image class="touch-active" bindtap="emojiChoose" src="http://soupu.oss-cn-shanghai.aliyuncs.com/emoji/{{e.emoji}}.png" data-emoji="{{e.char}}" data-oxf="{{e.emoji}}"></image> </view> </block> </scroll-view> </view> </view> </view> </view>

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; }

Page({ data: { talks: [], touchStart: 0, inputValue: '', inputBiaoqing: '', faces: ['https://cache.yisu.com/upload/information/20200622/114/32052.html', 'https://cache.yisu.com/upload/information/20200622/114/32053.html', 'https://cache.yisu.com/upload/information/20200622/114/32054.html'], names: ['贝贝', '晶晶', '欢欢', '妮妮'], isShow: false, //控制emoji表情是否显示 isLoad: true, //解决初试加载时emoji动画执行一次 cfBg: false, emojiChar: "☺-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-✈-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?-?", //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?image&quality=100&size=b4000_4000&sec=1535701703&di=bfde939cc559b0f8edcbfd1adb6e667d&src=https://cache.yisu.com/upload/information/20200622/114/32055', 'https://cache.yisu.com/upload/information/20200622/114/32056.html', 'https://cache.yisu.com/upload/information/20200622/114/32057.html', ]; let names = ['佳佳', '晶晶', '欢欢', '妮妮', '娜娜', '锅锅']; let contents = ['为什么你总是对我不理不睬呢', '干嘛老是不见你了', '我们都有字节的梦想', '你有什么资格不努力呢']; let talktime = '刚刚'; console.log(talktime) talks = talks.concat(that.data.talks); // 随机产生10条评论 for (var i = 0; i < 10; i++) { talks.push({ avatarUrl: faces[Math.floor(Math.random() * faces.length)], nickName: names[Math.floor(Math.random() * names.length)], content: contents[Math.floor(Math.random() * contents.length)], talkTime: talktime }); } this.setData({ talks: talks, talksAnimationData: that.animation.export() }) wx.hideNavigationBarLoading(); }, onScrollLoad: function() { // 加载新的数据 this.loadTalks(); }, //下拉评论框隐藏 touchStart: function(e) { let touchStart = e.touches[0].clientY; this.setData({ touchStart, }) }, touchMove: function(e) { // console.log(this.data.touchStart) let touchLength = e.touches[0].clientY - this.data.touchStart; console.log(touchLength - 100) if (touchLength > 100) { this.animation.bottom("-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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