index.wxml

<emoji-picker emoji-list="{{emojiKeys}}" bindpick="bindEmojiPick"></emoji-picker>
<textarea value="{{msg}}" bindinput="onInputTextarea"></textarea>
<!-- 注：emoji-list为可选参数，可以不传，会使用默认的表情列表 -->
<view class='preview'>
  所点击的表情：<emoji-text text="{{msg}}"></emoji-text>
</view>

index.js

const app = getApp()
const emojiList = require('../components/emoji-parser/wechat_emotion.js')
const emojiKeys = Object.keys(emojiList)
Page({
  data: {
    emojiKeys,
    msg:''
  },
  onLoad: function () {
    wx.setNavigationBarTitle({
      title: '表情选择器组件',
    })
  },
  onInputTextarea: function(e) {
    const {
      detail: {
        value
      }
    } = e;
    this.setData({
      msg: value
    })
  },
  bindEmojiPick(e){
    const emojiCode = e.detail.emojiCode
    console.log('点击了表情，组件传回',emojiCode)
    this.setData({
      msg:this.data.msg + emojiCode
    })
  }
})

index.json

{
  "usingComponents": {
    "emoji-text": "/components/emoji-parser/emoji-parser",
    "emoji-picker": "/components/emoji-picker/emoji-picker"
  }
}

组件及图片代码见我上传附件。
​点击查看附加代码​​