本文章记录,如何在vue3项目开发中,使用ip输入框组件.
之前写过vue2版本的ip组件,为了更好的适应vue3,此次进行vue3代码重写
几乎涵盖电脑上自带的IP输入框效果,如有问题,欢迎留言探讨.
先上效果图:

禁用效果图:

主要是组件的开发,代码如下,可直接拷贝使用.
大概思路就是: 使用四个输入框拼接,然后给输入内容添加校验操作,添加光标移动,
使用v-model语法糖特性

组件: IpAddress.vue

<template><div :class="{ 'disabled': disabled }"><ul class="ipAdress"><li v-for="(item, index) in ipAddress" :key="index"><input :ref="el => getInputRef(el, index)" v-model="item.value" type="text" class="ipInputClass":disabled="disabled" @input="checkIpVal(item)" @keyup="$event => turnIpPosition(item, index, $event)"@blur="handleBlur" @mouseup="handleMouseUp(index)" /><div></div></li></ul></div>
</template><script lang="ts" setup name="routePage">
import { ref, watch } from 'vue'// 接收来自上层的数据
const props = defineProps(['value', 'disabled'])// 更新数据
const $emits = defineEmits(['update:value', 'blur'])// 存储四个ref
const ipInputRefs = ref<HTMLElement[]>([]);
// 存储左右标识位
let markFlag = ref([{left: false,right: false},{left: false,right: false},{left: false,right: false},{left: false,right: false}
])// 更新标识
let flag = ref(false)// 鼠标点击
const handleMouseUp = (index: any) => {let input = ipInputRefs.value[index]// 全为falsemarkFlag.value.forEach(item => {item.left = falseitem.right = false})// 证明在开始阶段if (input.selectionStart == 0) {console.log('鼠标设置了,', index)markFlag.value[index].left = true} else {markFlag.value[index].left = false}// 证明在结束if (input.selectionStart == (input.value || '').length) {markFlag.value[index].right = true} else {markFlag.value[index].right = false}
}// 获取四个input refs
const getInputRef = (el: any, index: number) => {if (el) {ipInputRefs.value[index] = el;}
};
// 声明IP存储类型
interface IpType {value: string
}
// 定义要显示的四个ip
let ipAddress = ref<IpType[]>([{value: "",},{value: "",},{value: "",},{value: "",},
])
// 初始化显示数据
const initShowData = () => {// 判断不合理行为if (props.value === '') {ipAddress.value.forEach(item => {item.value = ''})} else {let ipList = props.value.split('.')ipAddress.value.forEach((item: IpType, index: number) => {item.value = ipList[index]})}
}// 检查ip输入
const checkIpVal = (item: any) => {let val = item.value;console.log(val, '===========')// 处理非数字val = val.toString().replace(/[^0-9]/g, "");val = parseInt(val, 10);if (isNaN(val)) {val = "";} else {val = val < 0 ? 0 : val;if (val > 255) {// 判断val是几位数let num = (val + '').lengthif (num > 3) {val = parseInt((val + '').substring(0, 3))} else {val = 255}}}item.value = val;console.log(item.value, '=========')
}// 判断光标左右移动位置
const turnIpPosition = (item: IpType, index: number, event: any) => {let e = event || window.event;if (e.keyCode === 37) {// 左箭头向左跳转，左一不做任何措施if (index == 0) {return}if (e.currentTarget.selectionStart === 0) {if (markFlag.value[index].left) {handleFocus(index - 1, 'toLeft')markFlag.value[index].left = falsemarkFlag.value[index].right = false} else {console.log('左键设置了,', index)markFlag.value[index].left = true}} else {markFlag.value[index].right = falsemarkFlag.value[index].left = false}} else if (e.keyCode == 39) {// 右箭头向右跳转，右一不做任何措施markFlag.value[index].left = falselet start = e.currentTarget.selectionStartif (index != 3 && start === item.value.toString().length) {if (markFlag.value[index].right) {handleFocus(index + 1, 'toRight')markFlag.value[index].left = falsemarkFlag.value[index].right = false} else {markFlag.value[index].right = true}} else {markFlag.value[index].right = false}} else if (e.keyCode === 8) {console.log('删除键把当前数据删除完毕后会跳转到前一个input')// 删除键把当前数据删除完毕后会跳转到前一个input，左一不做任何处理if (index !== 0 && e.currentTarget.selectionStart === 0) {if (markFlag.value[index].left) {ipInputRefs.value[index - 1].focus();markFlag.value[index].left = false} else {console.log('左键设置了删除,', index)markFlag.value[index].left = true}}} else if (e.keyCode === 13 || e.keyCode === 32) {console.log('回车键、空格键、冒号均向右跳转，右一不做任何措施')// 回车键、空格键、冒号均向右跳转，右一不做任何措施if (index !== 3) {ipInputRefs.value[index + 1].focus();}}else if (e.keyCode === 110 || e.keyCode === 190) {// 点 . 向右跳转，右一不做任何措施console.log('点击')if (item.value == '') {return}if (index !== 3) {ipInputRefs.value[index + 1].select();}}else if (item.value.toString().length === 3) {console.log('满3位，光标自动向下一个文本框')// 满3位，光标自动向下一个文本框.if (index !== 3) {ipInputRefs.value[index + 1].setSelectionRange(0, 0)}}
}// 处理聚焦
const handleFocus = (index: number, direction: string) => {// 设置当前位置为选中状态 toRight:从左边来的let input = ipInputRefs.value[index]input.focus()let value = input.value// null 左右全部设置为true,可以直接跳转if ((value || '').length == 0) {markFlag.value[index].right = truemarkFlag.value[index].left = true} else {if (direction == 'toRight') {// 可以直接跳回console.log('右键focus,', index)markFlag.value[index].left = true// 设置光标为左边第一个ipInputRefs.value[index].setSelectionRange(0, 0)// 设置上一个的右边标识为falsemarkFlag.value[index - 1] && (markFlag.value[index - 1].right = false)} else {// 直接跳回markFlag.value[index].right = true// 设置后一个侧边为falsemarkFlag.value[index + 1] && (markFlag.value[index + 1].left = false)}}
}// 格式化补零方法
const formatter = (val: string) => {let value = val.toString();if (value.length === 2) {value = "0" + value;} else if (value.length === 1) {value = "00" + value;} else if (value.length === 0) {value = "000";}return value;
}// 监听数据变化,并初始化显示四个数据
watch(() => props.value, () => {console.log('变化了~', props.value);if(flag.value){}else{initShowData()}
}, {immediate: true
})// 监听ipAddress数据变化
watch(ipAddress, () => {let str = "";for (const i in ipAddress.value) {str += formatter(ipAddress.value[i].value);}if (str === "000000000000") {str = "";} else {str = ipAddress.value.map(item => {if (item.value !== null) {return item.value + ''} else {return '0'}}).join(".")}$emits('update:value', str)flag.value = truesetTimeout(() => {flag.value = true}, 100)
}, {deep: true
})const handleBlur = () => {$emits('blur')
}</script>
<style lang="scss" scoped>
.disabled {cursor: not-allowed;background-color: #f5f7fa;.ipAdress {li {.ipInputClass {color: #c3c4cc;cursor: not-allowed;}}}
}.ipAdress {display: flex;border: 1px solid #dcdfe6;border-radius: 4px;line-height: 40px;width: 100%;height: 40px;padding-inline-start: 0px;padding-left: 10px;padding-right: 10px;box-sizing: border-box;margin: 0;
}.ipAdress li {position: relative;margin: 0;list-style-type: none;
}.ipInputClass {border: none;width: 50px;height: 23px;text-align: center;color: #606266;background: transparent;
}.ipAdress li div {position: absolute;bottom: 12px;right: 0;border-radius: 50%;background: #b6b8bc;width: 2px;height: 2px;
}/*只需要3个div*/
.ipAdress li:last-child div {display: none;
}/*取消掉默认的input focus状态*/
.ipAdress input:focus {outline: none;
}
</style>

注册为组件以后,在页面中使用如下，当然，组件名自己定义，我这里组件名是IpAddress

// ipAddress双向绑定,handleBlur 可以在失去光标时，做校验等操作
<IpAddress v-model:value="ipAddress" @blur="handleBlur" :disabled="true"/>