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+<template>
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+ <view class="u-char-box">
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+ <view class="u-char-flex">
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+ <input :disabled="disabledKeyboard" :value="valueModel" type="number" :focus="focus" :maxlength="maxlength" class="u-input" @input="getVal"/>
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+ <view v-for="(item, index) in loopCharArr" :key="index">
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+ <view :class="[breathe && charArrLength == index ? 'u-breathe' : '', 'u-char-item',
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+ charArrLength === index && mode == 'box' ? 'u-box-active' : '',
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+ mode === 'box' ? 'u-box' : '']" :style="{
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+ fontWeight: bold ? 'bold' : 'normal',
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+ fontSize: fontSize + 'rpx',
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+ width: width + 'rpx',
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+ height: width + 'rpx',
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+ color: inactiveColor,
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+ borderColor: charArrLength === index && mode == 'box' ? activeColor : inactiveColor
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+ }">
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+ <view class="u-placeholder-line" :style="{
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+ display: charArrLength === index ? 'block' : 'none',
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+ height: width * 0.5 +'rpx'
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+ }"
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+ v-if="mode !== 'middleLine'"
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+ ></view>
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+ <view v-if="mode === 'middleLine' && charArrLength <= index" :class="[breathe && charArrLength == index ? 'u-breathe' : '', charArrLength === index ? 'u-middle-line-active' : '']"
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+ class="u-middle-line" :style="{height: bold ? '4px' : '2px', background: charArrLength === index ? activeColor : inactiveColor}"></view>
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+ <view v-if="mode === 'bottomLine'" :class="[breathe && charArrLength == index ? 'u-breathe' : '', charArrLength === index ? 'u-bottom-line-active' : '']"
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+ class="u-bottom-line" :style="{height: bold ? '4px' : '2px', background: charArrLength === index ? activeColor : inactiveColor}"></view>
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+ <block v-if="!dotFill"> {{ charArr[index] ? charArr[index] : ''}}</block>
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+ <block v-else>
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+ <text class="u-dot">{{ charArr[index] ? '●' : ''}}</text>
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+ </block>
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+ </view>
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+ </view>
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+ </view>
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+ </view>
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+</template>
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+
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+<script>
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+ /**
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+ * messageInput 验证码输入框
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+ * @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
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+ * @tutorial https://www.uviewui.com/components/messageInput.html
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+ * @property {String Number} maxlength 输入字符个数(默认4)
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+ * @property {Boolean} dot-fill 是否用圆点填充(默认false)
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+ * @property {String} mode 模式选择,见上方"基本使用"说明(默认box)
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+ * @property {String Number} value 预置值
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+ * @property {Boolean} breathe 是否开启呼吸效果,见上方说明(默认true)
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+ * @property {Boolean} focus 是否自动获取焦点(默认false)
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+ * @property {Boolean} bold 字体和输入横线是否加粗(默认true)
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+ * @property {String Number} font-size 字体大小,单位rpx(默认60)
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+ * @property {String} active-color 当前激活输入框的样式(默认#2979ff)
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+ * @property {String} inactive-color 非激活输入框的样式,文字颜色同此值(默认#606266)
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+ * @property {String | Number} width 输入框宽度,单位rpx,高等于宽(默认80)
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+ * @property {Boolean} disabled-keyboard 禁止点击输入框唤起系统键盘(默认false)
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+ * @event {Function} change 输入内容发生改变时触发,具体见官网说明
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+ * @event {Function} finish 输入字符个数达maxlength值时触发,见官网说明
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+ * @example <u-message-input mode="bottomLine"></u-message-input>
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+ */
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+ export default {
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+ name: "u-message-input",
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+ props: {
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+ // 最大输入长度
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+ maxlength: {
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+ type: [Number, String],
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+ default: 4
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+ },
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+ // 是否用圆点填充
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+ dotFill: {
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+ type: Boolean,
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+ default: false
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+ },
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+ // 显示模式,box-盒子模式,bottomLine-横线在底部模式,middleLine-横线在中部模式
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+ mode: {
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+ type: String,
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+ default: "box"
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+ },
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+ // 预置值
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+ modelValue: {
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+ type: [String, Number],
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+ default: ''
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+ },
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+ // 当前激活输入item,是否带有呼吸效果
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+ breathe: {
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+ type: Boolean,
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+ default: true
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+ },
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+ // 是否自动获取焦点
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+ focus: {
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+ type: Boolean,
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+ default: false
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+ },
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+ // 字体是否加粗
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+ bold: {
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+ type: Boolean,
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+ default: false
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+ },
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+ // 字体大小
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+ fontSize: {
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+ type: [String, Number],
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+ default: 60
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+ },
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+ // 激活样式
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+ activeColor: {
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+ type: String,
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+ default: '#2979ff'
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+ },
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+ // 未激活的样式
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+ inactiveColor: {
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+ type: String,
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+ default: '#606266'
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+ },
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+ // 输入框的大小,单位rpx,宽等于高
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+ width: {
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+ type: [Number, String],
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+ default: '80'
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+ },
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+ // 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
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+ disabledKeyboard: {
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+ type: Boolean,
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+ default: false
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+ }
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+ },
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+ watch: {
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+ // maxlength: {
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+ // // 此值设置为true,会在组件加载后无需maxlength变化就会执行一次本监听函数,无需再created生命周期中处理
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+ // immediate: true,
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+ // handler(val) {
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+ // this.maxlength = Number(val);
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+ // }
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+ // },
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+ modelValue: {
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+ immediate: true,
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+ handler(val) {
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+ // 转为字符串
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+ val = String(val);
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+ // 超出部分截掉
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+ this.valueModel = val.substring(0, this.maxlength);
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+ }
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+ },
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+ },
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+ data() {
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+ return {
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+ valueModel: ""
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+ }
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+ },
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+ emits: ['change', 'finish'],
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+ computed: {
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+ // 是否显示呼吸灯效果
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+ animationClass() {
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+ return (index) => {
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+ if (this.breathe && this.charArr.length == index) return 'u-breathe';
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+ else return '';
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+ }
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+ },
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+ // 用于显示字符
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+ charArr() {
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+ return this.valueModel.split('');
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+ },
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+ charArrLength() {
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+ return this.charArr.length;
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+ },
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+ // 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
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+ loopCharArr() {
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+ return new Array(this.maxlength);
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+ }
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+ },
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+ methods: {
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+ getVal(e) {
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+ let {
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+ value
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+ } = e.detail
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+ this.valueModel = value;
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+ // 判断长度是否超出了maxlength值,理论上不会发生,因为input组件设置了maxlength属性值
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+ if (String(value).length > this.maxlength) return;
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+ // 未达到maxlength之前,发送change事件,达到后发送finish事件
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+ this.$emit('change', value);
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+ if (String(value).length == this.maxlength) {
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+ this.$emit('finish', value);
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+ }
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+ }
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+ }
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+ }
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+</script>
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+
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+<style scoped lang="scss">
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+ // 定义混入指令,用于在非nvue环境下的flex定义,因为nvue没有display属性,会报错
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+ @mixin vue-flex($direction: row) {
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+ /* #ifndef APP-NVUE */
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+ display: flex;
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+ flex-direction: $direction;
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+ /* #endif */
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+ }
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+
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+ @keyframes breathe {
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+ 0% {
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+ opacity: 0.3;
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+ }
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+
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+ 50% {
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+ opacity: 1;
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+ }
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+
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+ 100% {
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+ opacity: 0.3;
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+ }
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+ }
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+
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+ .u-char-box {
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+ text-align: center;
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+ }
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+
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+ .u-char-flex {
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+ @include vue-flex;
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+ justify-content: center;
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+ flex-wrap: wrap;
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+ position: relative;
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+ }
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+
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+ .u-input {
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+ position: absolute;
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+ top: 0;
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+ left: -100%;
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+ width: 200%;
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+ height: 100%;
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+ text-align: left;
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+ z-index: 9;
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+ opacity: 0;
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+ background: none;
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+ }
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+
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+ .u-char-item {
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+ position: relative;
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+ width: 90rpx;
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+ height: 90rpx;
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+ margin: 10rpx 10rpx;
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+ font-size: 60rpx;
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+ font-weight: bold;
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+ color: $u-main-color;
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+ line-height: 90rpx;
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+ @include vue-flex;
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+ justify-content: center;
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+ align-items: center;
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+ }
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+
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+ .u-middle-line {
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+ border: none;
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+ }
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+
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+ .u-box {
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+ box-sizing: border-box;
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+ border: 2rpx solid #cccccc;
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+ border-radius: 6rpx;
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+ }
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+
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+ .u-box-active {
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+ overflow: hidden;
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+ animation-timing-function: ease-in-out;
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+ animation-duration: 1500ms;
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+ animation-iteration-count: infinite;
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+ animation-direction: alternate;
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+ border: 2rpx solid $u-primary;
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+ }
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+
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+ .u-middle-line-active {
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+ background: $u-primary;
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+ }
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+
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+ .u-breathe {
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+ animation: breathe 2s infinite ease;
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+ }
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+
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+ .u-placeholder-line {
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+ /* #ifndef APP-NVUE */
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+ display: none;
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+ /* #endif */
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+ position: absolute;
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+ left: 50%;
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+ top: 50%;
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+ transform: translate(-50%, -50%);
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+ width: 2rpx;
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+ height: 40rpx;
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+ background: #333333;
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+ animation: twinkling 1.5s infinite ease;
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+ }
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+
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+ .u-animation-breathe {
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+ animation-name: breathe;
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+ }
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+
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+ .u-dot {
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+ font-size: 34rpx;
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+ line-height: 34rpx;
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+ }
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+
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+ .u-middle-line {
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+ height: 4px;
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+ background: #000000;
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+ width: 80%;
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+ position: absolute;
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+ border-radius: 2px;
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+ top: 50%;
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+ left: 50%;
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+ transform: translate(-50%, -50%);
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+ }
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+
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+ .u-bottom-line-active {
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+ background: $u-primary;
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+ }
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+
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+ .u-bottom-line {
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+ height: 4px;
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+ background: #000000;
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+ width: 80%;
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+ position: absolute;
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+ border-radius: 2px;
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+ bottom: 0;
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+ left: 50%;
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+ transform: translate(-50%);
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+ }
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+</style>
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