最近开发中遇到一个需求:

焊接机器人的屏幕上集成web前端网页, 但是没有接入键盘。这就需要web端开发一个虚拟键盘,在网上找个很多虚拟键盘没有特别适合,索性自己写个简单的

图片:

代码:

(代码可能比较垃圾冗余,也没时间优化,凑合看吧)

第一步:创建键盘组件

为了方便使用,我将键盘写成组件的方式,在app.vue中引入可以全局使用

<template><el-dialogv-model="isShows"append-to-body="true"width="80%"@close="dialogClose"><divclass="keyboard_pop"@click.self="isShows = false"><div class="input"><spanv-if="!showText"class="placeholder">请输入内容</span><p v-else>{{ showText }}</p></div><div class="keyboard"><divv-for="(row, index) in keyList":key="index"class="keyRow"><divv-for="(key, keyIndex) in row":key="keyIndex":class="{delete: key === 'Delete',capslock: key === 'Caps',space: key === 'Space',capsed: key === 'Caps' && hasCapsed,li: true,}"@click="clickKey(key)">{{ key }}</div></div></div></div></el-dialog>
</template>
<script setup name="template">import useHomeStore from "@/stores/home"; //引入仓库import { storeToRefs } from "pinia"; //引入pinia转换import { ElMessage } from "element-plus";const userInfoStore = useHomeStore();const { isShows, showText, inputType } = storeToRefs(userInfoStore); // 响应式const emits = defineEmits(["updatekey"]);const keyvalue = ref(showText); //键盘输入值  this.keyboardtextconst normalKeyList = ref([["1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "="],["q", "w", "e", "r", "t", "y", "u", "i", "o", "p", "[", "]", "\\"],["a", "s", "d", "f", "g", "h", "j", "k", "l", ";", "'", "Enter"],["z", "x", "c", "v", "b", "n", "m", ",", ".", "/"],["Caps", "Space", "Delete"],]); //正常键盘列表const capsedKeyList = ref([["1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "="],["Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P", "[", "]", "\\"],["A", "S", "D", "F", "G", "H", "J", "K", "L", ";", "'", "Enter"],["Z", "X", "C", "V", "B", "N", "M", ",", ".", "/"],["Caps", "Space", "Delete"],]); //大写键盘列表const keyList = ref(normalKeyList.value); //键盘列表const hasCapsed = ref(false); //是否大写const clickKey = (key) => {if (inputType.value == "number") {const flag = ["0","1","2","3","4","5","6","7","8","9",'.',"Enter","Delete",].includes(key);if (!flag) {return ElMessage({message: "请输入数字",type: "warning",});}}switch (key) {case "Enter":userInfoStore.showText = keyvalue.value;userInfoStore.clickEnter();break;case "Delete":let kbt = keyvalue.value;keyvalue.value = kbt.length ? kbt.substring(0, kbt.length - 1) : kbt;break;case "Space":keyvalue.value += " ";break;case "Caps":hasCapsed.value = !hasCapsed.value;keyList.value = hasCapsed.value ? capsedKeyList.value : normalKeyList.value;break;default:keyvalue.value += key;break;}userInfoStore.showText = keyvalue.value;const dialogClose = () => {//遮罩层关闭userInfoStore.dialogClose();};};
</script>
<style lang="scss" scoped>.input {min-height: 80px;border: 1px solid #ccc;border-radius: 5px;margin-bottom: 30px;padding: 10px;}.keyboard_pop {width: 100%;}.keyRow {display: flex;justify-content: space-between;align-items: center;margin-bottom: 10px;}.keyboard {margin: 0;padding: 0;list-style: none;user-select: none;background: #fff;width: 100%;padding: 5px 15px;overflow: auto;.li {padding: 8px 18px;text-align: center;background: #fff;border-radius: 15px;font-size: 18px;font-weight: 500;box-shadow: 0 3px 6px 0px #cac9c9;&:hover {cursor: pointer;background: #03ba82;color: #fff;}&:active {top: 1px;left: 1px;}}.delete {width: 100px;}.space {width: 300px;}.capsed {position: relative;top: 1px;left: 1px;border-color: #e5e5e5;cursor: pointer;}}
</style>

第二步:注册自定义事件

(给元素绑定自定义事件,input获取光标直接可以显示虚拟键盘,方便操作!)

const isInput = (dom) => {// 检查dom是否是input元素if (dom.tagName === "INPUT") {return dom;}// 如果不是input元素，且有子节点，则递归查找子节点if (dom.children) {for (let child of dom.children) {let input = isInput(child);if (input) {return input; // 如果找到input元素，立即返回}}}// 如果没有找到input元素，返回nullreturn null;
};import pinia from "@/stores/index";
import useHomeStore from "@/stores/home"; //引入仓库
const userInfoStore = useHomeStore(pinia);export const showKeyboard = {mounted(el, binding) {const input = isInput(el);if (!input) {return console.log("绑定错误,没有input元素");}//保存input元素userInfoStore.inputDom = input;//给input注册input事件input.addEventListener("focus", function (e) {console.log("聚焦了");console.dir(e);//保存input输入框的类型userInfoStore.inputType = e.target.type;userInfoStore.inputDom = e.target;userInfoStore.isShows = true;userInfoStore.showText = e.target.value;e.target.blur();});//   input.addEventListener("blur", function (e) {//    console.log("失去聚焦了");// //    userInfoStore.isShows = false;//   });},
};

第三步:pinia保存全局变量

(全局保存变量,各个input输入的值方便保存)

import { defineStore } from "pinia";const useHomeStore = defineStore("Home", {// defineStore('userInfo',{})  Home就是这个仓库的名称namestate: () => ({inputDom: null,isShows: false,showText: "",inputType: "",}),actions: {//点击键盘确定clickEnter() {//this.inputDom.change()console.log(this.showText);this.inputDom.value = JSON.parse(JSON.stringify(this.showText))console.dir(this.inputDom);//手动触发change事件//  什么是dispatchEvent// 向一个指定的事件目标派发一个事件,//  并以合适的顺序同步调用目标元素相关的事件处理函数。//  标准事件处理规则(包括事件捕获和可选的冒泡过程)//  同样适用于通过手动的使用dispatchEvent()方法派发的事件。this.inputDom.dispatchEvent(new Event("input"));this.inputDom.dispatchEvent(new Event("change"));this.showText = "";this.inputDom.blur();this.isShows = false;this.inputDom = null;this.inputType = "";},//遮罩层关闭dialogClose() {this.showText = "";this.isShows = false;this.inputDom.blur();this.inputDom = null;this.inputType = "";},},
});export default useHomeStore;