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false
markFlag.value.forEach(item => {
item.left = false
item.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 + '').length
if (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 = false
markFlag.value[index].right = false
} else {
console.log('左键设置了,', index)
markFlag.value[index].left = true
}
} else {
markFlag.value[index].right = false
markFlag.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 = false
let start = e.currentTarget.selectionStart
if (index != 3 && start === item.value.toString().length) {
if (markFlag.value[index].right) {
handleFocus(index + 1, 'toRight')
markFlag.value[index].left = false
markFlag.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 = true
markFlag.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false
markFlag.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false
markFlag.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 = true
setTimeout(() => {
flag.value = false
}, 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"/>