要实现的功能:
完全和单输入框一样的操作,甚至可以插入覆盖:
1,限制输入数字
2,正常输入
3,backspace删除
4,paste任意位置粘贴输入
5,光标选中一个数字,滚轮可以微调数字大小,限制0-9
6,123|456 自动覆盖光标后输入的字符,此时光标在3后,继续输入111,会得到123111,而不用手动删除456
7,封装成vue单文件组件,方便任意调用。
模板代码
<template> <div class="input-box"> <div class="input-content" @keydown="keydown" @keyup="keyup" @paste="paste" @mousewheel="mousewheel" @input="inputEvent"> <input max="9" min="0" maxlength="1" data-index="0" v-model.trim.number="input[0]" type="number" ref="firstinput"/> <input max="9" min="0" maxlength="1" data-index="1" v-model.trim.number="input[1]" type="number"/> <input max="9" min="0" maxlength="1" data-index="2" v-model.trim.number="input[2]" type="number"/> <input <input max="9" min="0" maxlength="1" data-index="4" v-model.trim.number="input[4]" type="number"/> <input max="9" min="0" maxlength="1" data-index="5" v-model.trim.number="input[5]" type="number"/> </div> </div> </template>
实现了键盘的keydown/keyup/paste/input和鼠标滚轮mousewheel事件
使用了6个输入框的方案来实现。
样式部分:使用了scss模式
<style scoped lang="scss"> .input-box { .input-content { width: 512px; height: 60px; display: flex; align-items: center; justify-content: space-between; input { color: inherit; font-family: inherit; border: 0; outline: 0; border-bottom: 1px solid #919191; height: 60px; width: 60px; font-size: 44px; text-align: center; } } input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { appearance: none; margin: 0; } } </style>
具体实现逻辑:主要实现以上几个键盘事件操作。
<script> export default { data() { return { // 存放粘贴进来的数字 pasteResult: [], }; }, props: ['code'], computed: { input() { // 计算输入框的值 if (this.code && Array.isArray(this.code) && this.code.length === 6) { return this.code; } else if (/^\d{6}$/.test(this.code.toString())) { return this.code.toString().split(''); } else if (this.pasteResult.length === 6) { return this.pasteResult; } else { return new Array(6); } } }, methods: { // 解决一个输入框输入多个字符 inputEvent(e) { var index = e.target.dataset.index * 1; var el = e.target; this.$set(this.input, index, el.value.slice(0, 1)) }, keydown(e) { var index = e.target.dataset.index * 1; var el = e.target; if (e.key === 'Backspace') { if (this.input[index].length > 0) { this.$set(this.input, index, '') } else { if (el.previousElementSibling) { el.previousElementSibling.focus() this.$set(this.input, index - 1, '') } } } else if (e.key === 'Delete') { if (this.input[index].length > 0) { this.$set(this.input, index, '') } else { if (el.nextElementSibling) { this.$set(this.input, index = 1, '') } } if (el.nextElementSibling) { el.nextElementSibling.focus() } } else if (e.key === 'Home') { el.parentElement.children[0] && el.parentElement.children[0].focus() } else if (e.key === 'End') { el.parentElement.children[this.input.length - 1] && el.parentElement.children[this.input.length - 1].focus() } else if (e.key === 'ArrowLeft') { if (el.previousElementSibling) { el.previousElementSibling.focus() } } else if (e.key === 'ArrowRight') { if (el.nextElementSibling) { el.nextElementSibling.focus() } } else if (e.key === 'ArrowUp') { if (this.input[index] * 1 < 9) { this.$set(this.input, index, (this.input[index] * 1 + 1).toString()); } } else if (e.key === 'ArrowDown') { if (this.input[index] * 1 > 0) { this.$set(this.input, index, (this.input[index] * 1 - 1).toString()); } } }, keyup(e) { var index = e.target.dataset.index * 1; var el = e.target; // 解决输入e和无法删除e的问题 感谢一楼网友 https://segmentfault.com/u/nanzk8fl 的指正 el.value=el.value.replace(/1/g,''); if (/Digit|Numpad/i.test(e.code)) { this.$set(this.input, index, e.code.replace(/Digit|Numpad/i, '')); el.nextElementSibling && el.nextElementSibling.focus(); if (index === 5) { if (this.input.join('').length === 6) { document.activeElement.blur(); this.$emit('complete', this.input); } } } else { if (this.input[index] === '') { this.$set(this.input, index, ''); } } }, mousewheel(e) { var index = e.target.dataset.index; if (e.wheelDelta > 0) { if (this.input[index] * 1 < 9) { this.$set(this.input, index, (this.input[index] * 1 + 1).toString()); } } else if (e.wheelDelta < 0) { if (this.input[index] * 1 > 0) { this.$set(this.input, index, (this.input[index] * 1 - 1).toString()); } } else if (e.key === 'Enter') { if (this.input.join('').length === 6) { document.activeElement.blur(); this.$emit('complete', this.input); } } }, paste(e) { // 当进行粘贴时 e.clipboardData.items[0].getAsString(str => { if (str.toString().length === 6) { this.pasteResult = str.split(''); document.activeElement.blur(); this.$emit('complete', this.input); // 恢复缓冲区 this.pasteResult = []; } else { // 如果粘贴内容不合规,清除所有内容 this.input = new Array(6) } }) } }, mounted() { // 等待dom渲染完成,在执行focus,否则无法获取到焦点 this.$nextTick(() => { this.$refs.firstinput.focus() }) }, } </script>
如果你发现了bug,或者有优化空间,欢迎你的指正和建议。我会随时更新到原代码当中,分享给大家。