npm install simple-keyboard --save
npm install simple-keyboard-layouts --save

<template>
  <div :class="keyboardClass"></div>
</template>
<script>
import Keyboard from 'simple-keyboard'
import 'simple-keyboard/build/css/index.css'
import layout from 'simple-keyboard-layouts/build/layouts/chinese' // 中文輸入法
export default {
  name: 'SimpleKeyboard',
  props: {
    keyboardClass: {
      default: 'simple-keyboard',
      type: String,
    },
    input: {
      default: '',
    },
    maxLength: { default: '' },
  },
  data: () => ({
    keyboard: null,
    displayDefault: {
      '{bksp}': 'backspace',
      '{lock}': 'caps',
      '{enter}': '> enter',
      '{tab}': 'tab',
      '{shift}': 'shift',
      '{change}': '中文',
      '{space}': ' ',
      '{clear}': '清空',
      '{close}': '關閉',
    },
  }),
  mounted() {
    this.keyboard = new Keyboard(this.keyboardClass, {
      onChange: this.onChange,
      onKeyPress: this.onKeyPress,
      layoutCandidates: layout.layoutCandidates,
      layout: {
        // 默認布局
        default: [
          '` 1 2 3 4 5 6 7 8 9 0 - = {bksp}',
          '{tab} q w e r t y u i o p [ ] \\',
          "{lock} a s d f g h j k l ; ' {enter}",
          '{shift} z x c v b n m , . / {clear}',
          '{change} {space} {close}',
        ],
        // shift布局
        shift: [
          '~ ! @ # $ % ^ & * ( ) _ + {bksp}',
          '{tab} Q W E R T Y U I O P { } |',
          '{lock} A S D F G H J K L : " {enter}',
          '{shift} Z X C V B N M < > ? {clear}',
          '{change} {space} {close}',
        ],
      },
      // 按鈕展示文字
      display: this.displayDefault,
      // 按鈕樣式
      buttonTheme: [
        {
          class: 'hg-red close',
          buttons: '{close}',
        },
        {
          class: 'change',
          buttons: '{change}',
        },
      ],
      // 輸入限制長度
      maxLength: this.maxLength,
    })
  },
  methods: {
    onChange(input) {
      this.keyboard.setInput(input)
      this.$emit('onChange', input)
    },
    // 點擊鍵盤
    onKeyPress(button, $event) {
      console.log(button)
      // 點擊關閉
      if (button === '{close}') {
        // let keyboard = $event.path[3]
        // 子組件調用父組件的關閉按鈕方法
        this.$parent.closekeyboard()
        // keyboard.style.visibility = 'hidden'
        return false
      } else if (button === '{change}') {
        // 切換中英文輸入法
        if (this.keyboard.options.layoutCandidates !== null) {
          this.$set(this.displayDefault, '{change}', '英文')
          // 切換至英文
          this.keyboard.setOptions({
            layoutCandidates: null,
            display: this.displayDefault,
          })
        } else {
          // 切換至中文
          this.$set(this.displayDefault, '{change}', '中文')
          this.keyboard.setOptions({
            layoutCandidates: layout.layoutCandidates,
            display: this.displayDefault,
          })
        }
      } else if (button === '{clear}') {
        this.keyboard.clearInput()
      } else {
        let value =
          $event.target.offsetParent.parentElement.children[0].children[0].value
        // 輸入框有默認值時，覆寫
        if (value) {
          this.keyboard.setInput(value)
        }
        this.$emit('onKeyPress', button)
      }
      if (button === '{shift}' || button === '{lock}') this.handleShift()
    },
    // 切換shift/默認布局
    handleShift() {
      let currentLayout = this.keyboard.options.layoutName
      let shiftToggle = currentLayout === 'default' ? 'shift' : 'default'
      this.keyboard.setOptions({
        layoutName: shiftToggle,
      })
    },
  },
  watch: {
    input(input) {
      this.keyboard.setInput(input)
    },
  },
}
</script>
<style lang="less">
@deep: ~'>>>';
.hg-theme-default {
  width: 70%;
  .hg-button {
    &.hg-red {
      background: #db3e5d;
      color: white;
      &.close {
        max-width: 200px;
      }
    }
    &.change {
      max-width: 200px;
    }
  }
}
</style>

<el-input v-model="toolParameter.latheNumber" @focus="onInputFocus('latheNumber')">
</el-input>
 
<el-input v-model="toolParameter.tid" @focus="onInputFocus('tid')" placeholder="">
</el-input>
 
<div v-show="showKeyboard">
      <SimpleKeyboard ref="SimpleKeyboard" @onChange="onChangeKeyboard" />
</div>

 
import SimpleKeyboard from '../../components/simpleKeyboard.vue'
export default {
  name: 'Home',
   components: {
    SimpleKeyboard,
   },
   data() {
    return {
        showKeyboard: false, //鍵盤默認隱藏
        changeIpt:'',//選擇了哪個輸入框
    }
   },
   
   methods:{
    // inpuit獲取焦點顯示虛擬鍵盤
    onInputFocus(res) {
      this.showKeyboard = true
      this.changeIpt = res
      // 父組件調用子組件的方法
      this.$refs.SimpleKeyboard.onKeyPress('{clear}')
    },
 // 給輸入框賦值
    onChangeKeyboard(input) {
      if (this.changeIpt == 'latheNumber') {
        this.toolParameter.latheNumber = input
      } else if (this.changeIpt == 'tid') {
        this.toolParameter.tid = input
      }
    },
    // 點擊關閉隱藏鍵盤
    closekeyboard() {
      this.showKeyboard = false
    },
   }
}

// 鍵盤樣式
.simple-keyboard {
  position: absolute;
  bottom: 0;
  left: 5%;
  width: 90%;
  color: #000;
  z-index: 999999999;
}