<template>
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<view class="xt__verify-code">
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<!-- 输入框 -->
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<input
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id="xt__input"
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:value="code"
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class="xt__input"
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:focus="isFocus"
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:password="isPassword"
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:type="inputType"
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:maxlength="size"
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@input="input"
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@focus="inputFocus"
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@blur="inputBlur"
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/>
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<!-- 光标 -->
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<view
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id="xt__cursor"
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v-if="cursorVisible && type !== 'middle'"
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class="xt__cursor"
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:style="{ left: codeCursorLeft[code.length] + 'px', height: cursorHeight + 'px', backgroundColor: cursorColor }"
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></view>
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<!-- 输入框 - 组 -->
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<view id="xt__input-ground" class="xt__input-ground">
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<template v-for="(item, index) in size">
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<view
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:key="index"
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:style="{ borderColor: code.length === index && cursorVisible ? boxActiveColor : boxNormalColor }"
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:class="['xt__box', `xt__box-${type + ''}`, `xt__box::after`]"
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>
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<view :style="{ borderColor: boxActiveColor }" class="xt__middle-line" v-if="type === 'middle' && !code[index]"></view>
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<text class="xt__code-text">{{ code[index] | codeFormat(isPassword) }}</text>
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</view>
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</template>
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</view>
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</view>
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</template>
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<script>
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/**
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* @description 输入验证码组件
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* @property {string} type = [box|middle|bottom] - 显示类型 默认：box -eg:bottom
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* @property {string} inputType = [text|number] - 输入框类型 默认：number -eg:number
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* @property {number} size = [4|6] - 支持的验证码数量 默认：6 -eg:6
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* @property {boolean} isFocus - 是否立即聚焦 默认：true
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* @property {boolean} isPassword - 是否以密码形式显示 默认false -eg:false
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* @property {string} cursorColor - 光标颜色 默认：#cccccc
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* @property {string} boxNormalColor - 光标未聚焦到的框的颜色 默认：#cccccc
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* @property {string} boxActiveColor - 光标聚焦到的框的颜色 默认：#000000
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* @event {Function(data)} confirm - 输入完成
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*/
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export default {
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name: 'xt-verify-code',
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props: {
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value: {
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type: String,
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default: () => ''
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},
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type: {
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type: String,
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default: () => 'box'
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},
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inputType: {
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type: String,
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default: () => 'number'
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},
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size: {
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type: Number,
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default: () => 6
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},
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isFocus: {
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type: Boolean,
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default: () => true
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},
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isPassword: {
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type: Boolean,
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default: () => false
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},
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cursorColor: {
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type: String,
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default: () => '#cccccc'
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},
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boxNormalColor: {
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type: String,
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default: () => '#cccccc'
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},
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boxActiveColor: {
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type: String,
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default: () => '#000000'
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}
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},
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model: {
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prop: 'value',
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event: 'input'
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},
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data() {
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return {
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cursorVisible: false,
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cursorHeight: 35,
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code: '', // 输入的验证码
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codeCursorLeft: [] // 向左移动的距离数组
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};
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},
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created() {
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this.cursorVisible = this.isFocus;
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},
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mounted() {
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this.init();
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},
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methods: {
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/**
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* @description 初始化
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*/
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init() {
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this.getCodeCursorLeft();
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this.setCursorHeight();
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},
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/**
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* @description 获取元素节点
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* @param {string} elm - 节点的id、class 相当于 document.querySelect的参数 -eg: #id
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* @param {string} type = [single|array] - 单个元素获取多个元素 默认是单个元素
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* @param {Function} callback - 回调函数
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*/
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getElement(elm, type = 'single', callback) {
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uni
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.createSelectorQuery()
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.in(this)
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[type === 'array' ? 'selectAll' : 'select'](elm)
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.boundingClientRect()
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.exec(data => {
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callback(data[0]);
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});
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},
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/**
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* @description 计算光标的高度
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*/
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setCursorHeight() {
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this.getElement('.xt__box', 'single', boxElm => {
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this.cursorHeight = boxElm.height * 0.6;
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});
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},
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/**
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* @description 获取光标在每一个box的left位置
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*/
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getCodeCursorLeft() {
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// 获取父级框的位置信息
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this.getElement('#xt__input-ground', 'single', parentElm => {
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const parentLeft = parentElm.left;
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// 获取各个box信息
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this.getElement('.xt__box', 'array', elms => {
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this.codeCursorLeft = [];
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elms.forEach(elm => {
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this.codeCursorLeft.push(elm.left - parentLeft + elm.width / 2);
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});
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});
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});
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},
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// 输入框输入变化的回调
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input(e) {
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const value = e.detail.value;
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this.cursorVisible = value.length !== this.size;
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this.$emit('input', value);
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this.inputSuccess(value);
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},
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// 输入完成回调
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inputSuccess(value) {
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if (value.length === this.size) {
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this.$emit('confirm', value);
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}
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},
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// 输入聚焦
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inputFocus() {
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this.cursorVisible = this.code.length !== this.size;
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},
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// 输入失去焦点
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inputBlur() {
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this.cursorVisible = false;
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}
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},
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watch: {
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value(val) {
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this.code = val;
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}
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},
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filters: {
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codeFormat(val, isPassword) {
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let value = '';
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if (val) {
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value = isPassword ? '*' : val;
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}
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return value;
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}
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}
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};
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</script>
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<style lang="scss" scoped>
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.xt__verify-code {
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position: relative;
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width: 100%;
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box-sizing: border-box;
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.xt__input {
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height: 100%;
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width: 200%;
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position: absolute;
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left: -100%;
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z-index: 1;
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}
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.xt__cursor {
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position: absolute;
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top: 50%;
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transform: translateY(-50%);
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display: inline-block;
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width: 2px;
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animation-name: cursor;
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animation-duration: 0.8s;
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animation-iteration-count: infinite;
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}
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.xt__input-ground {
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display: flex;
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justify-content: space-between;
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align-items: center;
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width: 100%;
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box-sizing: border-box;
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.xt__box {
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position: relative;
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display: inline-block;
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width: 76rpx;
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height: 112rpx;
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&-bottom {
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border-bottom-width: 2px;
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border-bottom-style: solid;
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}
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&-box {
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border-width: 2px;
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border-style: solid;
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}
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&-middle {
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border: none;
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}
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.xt__middle-line {
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position: absolute;
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top: 50%;
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left: 50%;
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width: 50%;
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transform: translate(-50%, -50%);
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border-bottom-width: 2px;
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border-bottom-style: solid;
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}
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.xt__code-text {
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position: absolute;
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top: 50%;
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left: 50%;
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font-size:52rpx;
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transform: translate(-50%, -50%);
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}
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}
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}
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}
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@keyframes cursor {
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0% {
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opacity: 1;
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}
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100% {
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opacity: 0;
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}
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}
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</style>
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