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- <template>
- <view class="u-number-box">
- <view
- class="u-number-box__slot"
- @tap.stop="clickHandler('minus')"
- @touchstart="onTouchStart('minus')"
- @touchend.stop="clearTimeout"
- v-if="showMinus && $slots.minus"
- >
- <slot name="minus" />
- </view>
- <view
- v-else-if="showMinus"
- class="u-number-box__minus"
- @tap.stop="clickHandler('minus')"
- @touchstart="onTouchStart('minus')"
- @touchend.stop="clearTimeout"
- hover-class="u-number-box__minus--hover"
- hover-stay-time="150"
- :class="{ 'u-number-box__minus--disabled': isDisabled('minus') }"
- :style="[buttonStyle('minus')]"
- >
- <u-icon
- name="minus"
- :color="isDisabled('minus') ? '#c8c9cc' : '#323233'"
- size="15"
- bold
- :customStyle="iconStyle"
- ></u-icon>
- </view>
- <slot name="input">
- <input
- :disabled="disabledInput || disabled"
- :cursor-spacing="getCursorSpacing"
- :class="{ 'u-number-box__input--disabled': disabled || disabledInput }"
- v-model="currentValue"
- class="u-number-box__input"
- @blur="onBlur"
- @focus="onFocus"
- @input="onInput"
- type="number"
- :style="[inputStyle]"
- />
- </slot>
- <view
- class="u-number-box__slot"
- @tap.stop="clickHandler('plus')"
- @touchstart="onTouchStart('plus')"
- @touchend.stop="clearTimeout"
- v-if="showPlus && $slots.plus"
- >
- <slot name="plus" />
- </view>
- <view
- v-else-if="showPlus"
- class="u-number-box__plus"
- @tap.stop="clickHandler('plus')"
- @touchstart="onTouchStart('plus')"
- @touchend.stop="clearTimeout"
- hover-class="u-number-box__plus--hover"
- hover-stay-time="150"
- :class="{ 'u-number-box__minus--disabled': isDisabled('plus') }"
- :style="[buttonStyle('plus')]"
- >
- <u-icon
- name="plus"
- :color="isDisabled('plus') ? '#c8c9cc' : '#323233'"
- size="15"
- bold
- :customStyle="iconStyle"
- ></u-icon>
- </view>
- </view>
- </template>
- <script>
- import props from './props.js';
- /**
- * numberBox 步进器
- * @description 该组件一般用于商城购物选择物品数量的场景。
- * @tutorial https://uviewui.com/components/numberBox.html
- * @property {String | Number} name 步进器标识符,在change回调返回
- * @property {String | Number} value 用于双向绑定的值,初始化时设置设为默认min值(最小值) (默认 0 )
- * @property {String | Number} min 最小值 (默认 1 )
- * @property {String | Number} max 最大值 (默认 Number.MAX_SAFE_INTEGER )
- * @property {String | Number} step 加减的步长,可为小数 (默认 1 )
- * @property {Boolean} integer 是否只允许输入整数 (默认 false )
- * @property {Boolean} disabled 是否禁用,包括输入框,加减按钮 (默认 false )
- * @property {Boolean} disabledInput 是否禁用输入框 (默认 false )
- * @property {Boolean} asyncChange 是否开启异步变更,开启后需要手动控制输入值 (默认 false )
- * @property {String | Number} inputWidth 输入框宽度,单位为px (默认 35 )
- * @property {Boolean} showMinus 是否显示减少按钮 (默认 true )
- * @property {Boolean} showPlus 是否显示增加按钮 (默认 true )
- * @property {String | Number} decimalLength 显示的小数位数
- * @property {Boolean} longPress 是否开启长按加减手势 (默认 true )
- * @property {String} color 输入框文字和加减按钮图标的颜色 (默认 '#323233' )
- * @property {String | Number} buttonSize 按钮大小,宽高等于此值,单位px,输入框高度和此值保持一致 (默认 30 )
- * @property {String} bgColor 输入框和按钮的背景颜色 (默认 '#EBECEE' )
- * @property {String | Number} cursorSpacing 指定光标于键盘的距离,避免键盘遮挡输入框,单位px (默认 100 )
- * @property {Boolean} disablePlus 是否禁用增加按钮 (默认 false )
- * @property {Boolean} disableMinus 是否禁用减少按钮 (默认 false )
- * @property {Object | String} iconStyle 加减按钮图标的样式
- *
- * @event {Function} onFocus 输入框活动焦点
- * @event {Function} onBlur 输入框失去焦点
- * @event {Function} onInput 输入框值发生变化
- * @event {Function} onChange
- * @example <u-number-box v-model="value" @change="valChange"></u-number-box>
- */
- export default {
- name: 'u-number-box',
- mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
- data() {
- return {
- // 输入框实际操作的值
- currentValue: '',
- // 定时器
- longPressTimer: null
- }
- },
- watch: {
- // 多个值之间,只要一个值发生变化,都要重新检查check()函数
- watchChange(n) {
- this.check()
- },
- // 监听v-mode的变化,重新初始化内部的值
- value(n) {
- if (n !== this.currentValue) {
- this.currentValue = this.format(this.value)
- }
- }
- },
- computed: {
- getCursorSpacing() {
- // 判断传入的单位,如果为px单位,需要转成px
- return uni.$u.getPx(this.cursorSpacing)
- },
- // 按钮的样式
- buttonStyle() {
- return (type) => {
- const style = {
- backgroundColor: this.bgColor,
- height: uni.$u.addUnit(this.buttonSize),
- color: this.color
- }
- if (this.isDisabled(type)) {
- style.backgroundColor = '#f7f8fa'
- }
- return style
- }
- },
- // 输入框的样式
- inputStyle() {
- const disabled = this.disabled || this.disabledInput
- const style = {
- color: this.color,
- backgroundColor: this.bgColor,
- height: uni.$u.addUnit(this.buttonSize),
- width: uni.$u.addUnit(this.inputWidth)
- }
- return style
- },
- // 用于监听多个值发生变化
- watchChange() {
- return [this.integer, this.decimalLength, this.min, this.max]
- },
- isDisabled() {
- return (type) => {
- if (type === 'plus') {
- // 在点击增加按钮情况下,判断整体的disabled,是否单独禁用增加按钮,以及当前值是否大于最大的允许值
- return (
- this.disabled ||
- this.disablePlus ||
- this.currentValue >= this.max
- )
- }
- // 点击减少按钮同理
- return (
- this.disabled ||
- this.disableMinus ||
- this.currentValue <= this.min
- )
- }
- },
- },
- mounted() {
- this.init()
- },
- methods: {
- init() {
- this.currentValue = this.format(this.value)
- },
- // 格式化整理数据,限制范围
- format(value) {
- value = this.filter(value)
- // 如果为空字符串,那么设置为0,同时将值转为Number类型
- value = value === '' ? 0 : +value
- // 对比最大最小值,取在min和max之间的值
- value = Math.max(Math.min(this.max, value), this.min)
- // 如果设定了最大的小数位数,使用toFixed去进行格式化
- if (this.decimalLength !== null) {
- value = value.toFixed(this.decimalLength)
- }
- return value
- },
- // 过滤非法的字符
- filter(value) {
- // 只允许0-9之间的数字,"."为小数点,"-"为负数时候使用
- value = String(value).replace(/[^0-9.-]/g, '')
- // 如果只允许输入整数,则过滤掉小数点后的部分
- if (this.integer && value.indexOf('.') !== -1) {
- value = value.split('.')[0]
- }
- return value;
- },
- check() {
- // 格式化了之后,如果前后的值不相等,那么设置为格式化后的值
- const val = this.format(this.currentValue);
- if (val !== this.currentValue) {
- this.currentValue = val
- }
- },
- // 判断是否出于禁止操作状态
- // isDisabled(type) {
- // if (type === 'plus') {
- // // 在点击增加按钮情况下,判断整体的disabled,是否单独禁用增加按钮,以及当前值是否大于最大的允许值
- // return (
- // this.disabled ||
- // this.disablePlus ||
- // this.currentValue >= this.max
- // )
- // }
- // // 点击减少按钮同理
- // return (
- // this.disabled ||
- // this.disableMinus ||
- // this.currentValue <= this.min
- // )
- // },
- // 输入框活动焦点
- onFocus(event) {
- this.$emit('focus', {
- ...event.detail,
- name: this.name,
- })
- },
- // 输入框失去焦点
- onBlur(event) {
- // 对输入值进行格式化
- const value = this.format(event.detail.value)
- // 发出blur事件
- this.$emit(
- 'blur',{
- ...event.detail,
- name: this.name,
- }
- )
- },
- // 输入框值发生变化
- onInput(e) {
- const {
- value = ''
- } = e.detail || {}
- // 为空返回
- if (value === '') return
- let formatted = this.filter(value)
- // 最大允许的小数长度
- if (this.decimalLength !== null && formatted.indexOf('.') !== -1) {
- const pair = formatted.split('.');
- formatted = `${pair[0]}.${pair[1].slice(0, this.decimalLength)}`
- }
- formatted = this.format(formatted)
- this.emitChange(formatted);
- },
- // 发出change事件
- emitChange(value) {
- // 如果开启了异步变更值,则不修改内部的值,需要用户手动在外部通过v-model变更
- if (!this.asyncChange) {
- this.$nextTick(() => {
- this.$emit('input', value)
- this.currentValue = value
- this.$forceUpdate()
- })
- }
- this.$emit('change', {
- value,
- name: this.name,
- });
- },
- onChange() {
- const {
- type
- } = this
- if (this.isDisabled(type)) {
- return this.$emit('overlimit', type)
- }
- const diff = type === 'minus' ? -this.step : +this.step
- const value = this.format(this.add(+this.currentValue, diff))
- this.emitChange(value)
- this.$emit(type)
- },
- // 对值扩大后进行四舍五入,再除以扩大因子,避免出现浮点数操作的精度问题
- add(num1, num2) {
- const cardinal = Math.pow(10, 10);
- return Math.round((num1 + num2) * cardinal) / cardinal
- },
- // 点击加减按钮
- clickHandler(type) {
- this.type = type
- this.onChange()
- },
- longPressStep() {
- // 每隔一段时间,重新调用longPressStep方法,实现长按加减
- this.clearTimeout()
- this.longPressTimer = setTimeout(() => {
- this.onChange()
- this.longPressStep()
- }, 250);
- },
- onTouchStart(type) {
- if (!this.longPress) return
- this.clearTimeout()
- this.type = type
- // 一定时间后,默认达到长按状态
- this.longPressTimer = setTimeout(() => {
- this.onChange()
- this.longPressStep()
- }, 600)
- },
- // 触摸结束,清除定时器,停止长按加减
- onTouchEnd() {
- if (!this.longPress) return
- this.clearTimeout()
- },
- // 清除定时器
- clearTimeout() {
- clearTimeout(this.longPressTimer)
- this.longPressTimer = null
- }
- }
- }
- </script>
- <style lang="scss" scoped>
- @import '../../libs/css/components.scss';
- $u-numberBox-hover-bgColor: #E6E6E6 !default;
- $u-numberBox-disabled-color: #c8c9cc !default;
- $u-numberBox-disabled-bgColor: #f7f8fa !default;
- $u-numberBox-plus-radius: 4px !default;
- $u-numberBox-minus-radius: 4px !default;
- $u-numberBox-input-text-align: center !default;
- $u-numberBox-input-font-size: 15px !default;
- $u-numberBox-input-padding: 0 !default;
- $u-numberBox-input-margin: 0 2px !default;
- $u-numberBox-input-disabled-color: #c8c9cc !default;
- $u-numberBox-input-disabled-bgColor: #f2f3f5 !default;
- .u-number-box {
- @include flex(row);
- align-items: center;
- &__slot {
- /* #ifndef APP-NVUE */
- touch-action: none;
- /* #endif */
- }
- &__plus,
- &__minus {
- width: 35px;
- @include flex;
- justify-content: center;
- align-items: center;
- /* #ifndef APP-NVUE */
- touch-action: none;
- /* #endif */
- &--hover {
- background-color: $u-numberBox-hover-bgColor !important;
- }
- &--disabled {
- color: $u-numberBox-disabled-color;
- background-color: $u-numberBox-disabled-bgColor;
- }
- }
- &__plus {
- border-top-right-radius: $u-numberBox-plus-radius;
- border-bottom-right-radius: $u-numberBox-plus-radius;
- }
- &__minus {
- border-top-left-radius: $u-numberBox-minus-radius;
- border-bottom-left-radius: $u-numberBox-minus-radius;
- }
- &__input {
- position: relative;
- text-align: $u-numberBox-input-text-align;
- font-size: $u-numberBox-input-font-size;
- padding: $u-numberBox-input-padding;
- margin: $u-numberBox-input-margin;
- @include flex;
- align-items: center;
- justify-content: center;
- &--disabled {
- color: $u-numberBox-input-disabled-color;
- background-color: $u-numberBox-input-disabled-bgColor;
- }
- }
- }
- </style>
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