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- <template>
- <view class="u-code-input">
- <view
- class="u-code-input__item"
- :style="[itemStyle(index)]"
- v-for="(item, index) in codeLength"
- :key="index"
- >
- <view
- class="u-code-input__item__dot"
- v-if="dot && codeArray.length > index"
- ></view>
- <text
- v-else
- :style="{
- fontSize: $u.addUnit(fontSize),
- fontWeight: bold ? 'bold' : 'normal',
- color: color
- }"
- >{{codeArray[index]}}</text>
- <view
- class="u-code-input__item__line"
- v-if="mode === 'line'"
- :style="[lineStyle]"
- ></view>
- <view v-if="codeArray.length === index" :style="{backgroundColor: color}" class="u-code-input__item__cursor"></view>
- </view>
- <input
- :disabled="disabledKeyboard"
- type="number"
- :focus="focus"
- :value="inputValue"
- :maxlength="maxlength"
- class="u-code-input__input"
- @input="inputHandler"
- :style="{
- height: $u.addUnit(size)
- }"
- />
- </view>
- </template>
- <script>
- import props from './props.js';
- /**
- * CodeInput 验证码输入
- * @description 该组件一般用于验证用户短信验证码的场景,也可以结合uView的键盘组件使用
- * @tutorial https://www.uviewui.com/components/codeInput.html
- * @property {String | Number} maxlength 最大输入长度 (默认 6 )
- * @property {Boolean} dot 是否用圆点填充 (默认 false )
- * @property {String} mode 显示模式,box-盒子模式,line-底部横线模式 (默认 'box' )
- * @property {Boolean} hairline 是否细边框 (默认 false )
- * @property {String | Number} space 字符间的距离 (默认 10 )
- * @property {String | Number} value 预置值
- * @property {Boolean} focus 是否自动获取焦点 (默认 false )
- * @property {Boolean} bold 字体和输入横线是否加粗 (默认 false )
- * @property {String} color 字体颜色 (默认 '#606266' )
- * @property {String | Number} fontSize 字体大小,单位px (默认 18 )
- * @property {String | Number} size 输入框的大小,宽等于高 (默认 35 )
- * @property {Boolean} disabledKeyboard 是否隐藏原生键盘,如果想用自定义键盘的话,需设置此参数为true (默认 false )
- * @property {String} borderColor 边框和线条颜色 (默认 '#c9cacc' )
- * @property {Boolean} disabledDot 是否禁止输入"."符号 (默认 true )
- *
- * @event {Function} change 输入内容发生改变时触发,具体见上方说明 value:当前输入的值
- * @event {Function} finish 输入字符个数达maxlength值时触发,见上方说明 value:当前输入的值
- * @example <u-code-input v-model="value4" :focus="true"></u-code-input>
- */
- export default {
- name: 'u-code-input',
- mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
- data() {
- return {
- inputValue: ''
- }
- },
- watch: {
- value: {
- immediate: true,
- handler(val) {
- // 转为字符串,超出部分截掉
- this.inputValue = String(val).substring(0, this.maxlength)
- }
- },
- },
- computed: {
- // 根据长度,循环输入框的个数,因为头条小程序数值不能用于v-for
- codeLength() {
- return new Array(Number(this.maxlength))
- },
- // 循环item的样式
- itemStyle() {
- return index => {
- const addUnit = uni.$u.addUnit
- const style = {
- width: addUnit(this.size),
- height: addUnit(this.size)
- }
- // 盒子模式下,需要额外进行处理
- if (this.mode === 'box') {
- // 设置盒子的边框,如果是细边框,则设置为0.5px宽度
- style.border = `${this.hairline ? 0.5 : 1}px solid ${this.borderColor}`
- // 如果盒子间距为0的话
- if (uni.$u.getPx(this.space) === 0) {
- // 给第一和最后一个盒子设置圆角
- if (index === 0) {
- style.borderTopLeftRadius = '3px'
- style.borderBottomLeftRadius = '3px'
- }
- if (index === this.codeLength.length - 1) {
- style.borderTopRightRadius = '3px'
- style.borderBottomRightRadius = '3px'
- }
- // 最后一个盒子的右边框需要保留
- if (index !== this.codeLength.length - 1) {
- style.borderRight = 'none'
- }
- }
- }
- if (index !== this.codeLength.length - 1) {
- // 设置验证码字符之间的距离,通过margin-right设置,最后一个字符,无需右边框
- style.marginRight = addUnit(this.space)
- } else {
- // 最后一个盒子的有边框需要保留
- style.marginRight = 0
- }
- return style
- }
- },
- // 将输入的值,转为数组,给item历遍时,根据当前的索引显示数组的元素
- codeArray() {
- return String(this.inputValue).split('')
- },
- // 下划线模式下,横线的样式
- lineStyle() {
- const style = {}
- style.height = this.hairline ? '2px' : '4px'
- style.width = uni.$u.addUnit(this.size)
- // 线条模式下,背景色即为边框颜色
- style.backgroundColor = this.borderColor
- return style
- }
- },
- methods: {
- // 监听输入框的值发生变化
- inputHandler(e) {
- const value = e.detail.value
- this.inputValue = value
- // 是否允许输入“.”符号
- if(this.disabledDot) {
- this.$nextTick(() => {
- this.inputValue = value.replace('.', '')
- })
- }
- // 未达到maxlength之前,发送change事件,达到后发送finish事件
- this.$emit('change', value)
- // 修改通过v-model双向绑定的值
- this.$emit('input', value)
- // 达到用户指定输入长度时,发出完成事件
- if (String(value).length >= Number(this.maxlength)) {
- this.$emit('finish', value)
- }
- }
- }
- }
- </script>
- <style lang="scss" scoped>
- @import "../../libs/css/components.scss";
- $u-code-input-cursor-width: 1px;
- $u-code-input-cursor-height: 40%;
- $u-code-input-cursor-animation-duration: 1s;
- $u-code-input-cursor-animation-name: u-cursor-flicker;
- .u-code-input {
- @include flex;
- position: relative;
- overflow: hidden;
- &__item {
- @include flex;
- justify-content: center;
- align-items: center;
- position: relative;
- &__text {
- font-size: 15px;
- color: $u-content-color;
- }
- &__dot {
- width: 7px;
- height: 7px;
- border-radius: 100px;
- background-color: $u-content-color;
- }
- &__line {
- position: absolute;
- bottom: 0;
- height: 4px;
- border-radius: 100px;
- width: 40px;
- background-color: $u-content-color;
- }
- &__cursor {
- position: absolute;
- top: 50%;
- left: 50%;
- transform: translate(-50%,-50%);
- width: $u-code-input-cursor-width;
- height: $u-code-input-cursor-height;
- animation: $u-code-input-cursor-animation-duration u-cursor-flicker infinite;
- }
- }
- &__input {
- // 之所以需要input输入框,是因为有它才能唤起键盘
- // 这里将它设置为两倍的屏幕宽度,再将左边的一半移出屏幕,为了不让用户看到输入的内容
- position: absolute;
- left: -750rpx;
- width: 1500rpx;
- top: 0;
- background-color: transparent;
- text-align: left;
- }
- }
-
- @keyframes u-cursor-flicker {
- 0% {
- opacity: 0;
- }
- 50% {
- opacity: 1;
- }
- 100% {
- opacity: 0;
- }
- }
- </style>
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