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474 lines
13 KiB
474 lines
13 KiB
5 months ago
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<!-- 步进器 -->
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<template>
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<view class="number-box">
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<view
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class="u-icon-minus"
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:class="{ 'u-icon-disabled': disabled || inputVal <= min }"
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:style="{
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background: bgColor,
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height: inputHeight + 'rpx',
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color: color,
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fontSize: size + 'rpx',
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minHeight: '1.4em'
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}"
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@click="emptyClick"
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@touchstart.prevent="btnTouchStart('minus')"
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@touchend.stop.prevent="clearTimer"
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>
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<view :style="'font-size:' + (Number(size) + 10) + 'rpx'" class="num-btn">－</view>
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</view>
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<input
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v-model="inputVal"
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:disabled="disabledInput || disabled"
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:cursor-spacing="getCursorSpacing"
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:class="{ 'u-input-disabled': disabled }"
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class="u-number-input"
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type="number"
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:style="{
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color: color,
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fontSize: size + 'rpx',
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background: bgColor,
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height: inputHeight + 'rpx',
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width: inputWidth + 'rpx'
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}"
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@blur="onBlur"
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@click="showInput=true"
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/>
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<view
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class="u-icon-plus"
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:class="{ 'u-icon-disabled': disabled || inputVal >= max }"
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:style="{
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background: bgColor,
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height: inputHeight + 'rpx',
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color: color,
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fontSize: size + 'rpx',
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minHeight: '1.4em'
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}"
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@click="emptyClick"
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@touchstart.prevent="btnTouchStart('plus')"
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@touchend.stop.prevent="clearTimer"
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>
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<view :style="'font-size:' + (Number(size) + 10) + 'rpx'" class="num-btn">＋</view>
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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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* numberBox 步进器（此为uview组件改造）
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* @description 该组件一般用于商城购物选择物品数量的场景。注意：该输入框只能输入大于或等于0的整数，不支持小数输入
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* @tutorial https://www.uviewui.com/components/numberBox.html
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* @property {Number} value 输入框初始值（默认1）
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* @property {String} bg-color 输入框和按钮的背景颜色（默认#F2F3F5）
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* @property {Number} min 用户可输入的最小值（默认0）
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* @property {Number} max 用户可输入的最大值（默认99999）
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* @property {Number} step 步长，每次加或减的值（默认1）
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* @property {Number} stepFirst 步进值，首次增加或最后减的值(默认step值和一致）
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* @property {Boolean} disabled 是否禁用操作，禁用后无法加减或手动修改输入框的值（默认false）
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* @property {Boolean} disabled-input 是否禁止输入框手动输入值（默认false）
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* @property {Boolean} positive-integer 是否只能输入正整数（默认true）
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* @property {String | Number} size 输入框文字和按钮字体大小，单位rpx（默认26）
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* @property {String} color 输入框文字和加减按钮图标的颜色（默认#323233）
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* @property {String | Number} input-width 输入框宽度，单位rpx（默认80）
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* @property {String | Number} input-height 输入框和按钮的高度，单位rpx（默认50）
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* @property {String | Number} index 事件回调时用以区分当前发生变化的是哪个输入框
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* @property {Boolean} long-press 是否开启长按连续递增或递减(默认true)
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* @property {String | Number} press-time 开启长按触发后，每触发一次需要多久，单位ms(默认250)
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* @property {String | Number} cursor-spacing 指定光标于键盘的距离，避免键盘遮挡输入框，单位rpx（默认200）
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* @event {Function} change 输入框内容发生变化时触发，对象形式
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* @event {Function} blur 输入框失去焦点时触发，对象形式
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* @event {Function} minus 点击减少按钮时触发(按钮可点击情况下)，对象形式
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* @event {Function} plus 点击增加按钮时触发(按钮可点击情况下)，对象形式
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* @example <number-box :min="1" :max="100"></number-box>
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*/
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export default {
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name: 'NumberBox',
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emits: ['update:modelValue', 'input', 'change', 'blur', 'plus', 'minus'],
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props: {
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// 预显示的数字
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value: {
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type: Number,
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default: 1
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},
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modelValue: {
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type: Number,
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default: 1
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},
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// 背景颜色
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bgColor: {
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type: String,
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default: '#FFFFFF'
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},
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// 最小值
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min: {
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type: Number,
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default: 0
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},
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// 最大值
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max: {
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type: Number,
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default: 99999
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},
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// 步进值，每次加或减的值
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step: {
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type: Number,
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default: 1
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},
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// 步进值，首次增加或最后减的值
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stepFirst: {
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type: Number,
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default: 0
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},
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// 是否只能输入 step 的倍数
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stepStrictly: {
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type: Boolean,
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default: false
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},
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// 是否禁用加减操作
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disabled: {
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type: Boolean,
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default: false
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},
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// input的字体大小，单位rpx
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size: {
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type: [Number, String],
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default: 26
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},
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// 加减图标的颜色
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color: {
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type: String,
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default: '#323233'
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},
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// input宽度，单位rpx
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inputWidth: {
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type: [Number, String],
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default: 80
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},
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// input高度，单位rpx
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inputHeight: {
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type: [Number, String],
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default: 50
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},
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// index索引，用于列表中使用，让用户知道是哪个numberbox发生了变化，一般使用for循环出来的index值即可
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index: {
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type: [Number, String],
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default: ''
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},
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// 是否禁用输入框，与disabled作用于输入框时，为OR的关系，即想要禁用输入框，又可以加减的话
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// 设置disabled为false，disabledInput为true即可
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disabledInput: {
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type: Boolean,
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default: true
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},
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// 输入框于键盘之间的距离
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cursorSpacing: {
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type: [Number, String],
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default: 100
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},
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// 是否开启长按连续递增或递减
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longPress: {
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type: Boolean,
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default: true
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},
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// 开启长按触发后，每触发一次需要多久
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pressTime: {
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type: [Number, String],
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default: 250
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},
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// 是否只能输入大于或等于0的整数(正整数)
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positiveInteger: {
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type: Boolean,
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default: true
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}
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},
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watch: {
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valueCom(v1, v2) {
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// 只有value的改变是来自外部的时候，才去同步inputVal的值，否则会造成循环错误
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if (!this.changeFromInner) {
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this.inputVal = v1;
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// 因为inputVal变化后，会触发this.handleChange()，在其中changeFromInner会再次被设置为true，
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// 造成外面修改值，也导致被认为是内部修改的混乱，这里进行this.$nextTick延时，保证在运行周期的最后处
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// 将changeFromInner设置为false
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this.$nextTick(function() {
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this.changeFromInner = false;
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});
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}
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},
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inputVal(v1, v2) {
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// 为了让用户能够删除所有输入值，重新输入内容，删除所有值后，内容为空字符串
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if (v1 == '') return;
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let value = 0;
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// 首先判断是否数值，并且在min和max之间，如果不是，使用原来值
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let tmp = this.isNumber(v1);
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if (tmp && v1 >= this.min && v1 <= this.max) value = v1;
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else value = v2;
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// 判断是否只能输入大于等于0的整数
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if (this.positiveInteger) {
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// 小于0，或者带有小数点，
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if (v1 < 0 || String(v1).indexOf('.') !== -1) {
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value = v2;
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// 双向绑定input的值，必须要使用$nextTick修改显示的值
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this.$nextTick(() => {
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this.inputVal = v2;
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});
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}
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}
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// 发出change事件
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this.handleChange(value, 'change');
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},
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min(v1) {
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if (v1 !== undefined && v1 != '' && this.valueCom < v1) {
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this.$emit('input', v1);
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this.$emit('update:modelValue', v1);
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}
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},
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max(v1) {
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if (v1 !== undefined && v1 != '' && this.valueCom > v1) {
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this.$emit('input', v1);
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this.$emit('update:modelValue', v1);
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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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inputVal: 1, // 输入框中的值，不能直接使用props中的value，因为应该改变props的状态
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timer: null, // 用作长按的定时器
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changeFromInner: false, // 值发生变化，是来自内部还是外部
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innerChangeTimer: null ,// 内部定时器
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showInput:false,
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};
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},
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created() {
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this.inputVal = Number(this.valueCom);
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},
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computed: {
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valueCom() {
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// #ifndef VUE3
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return this.value;
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// #endif
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// #ifdef VUE3
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return this.modelValue;
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// #endif
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},
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getCursorSpacing() {
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// 先将值转为px单位，再转为数值
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return Number(uni.upx2px(this.cursorSpacing));
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}
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},
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methods: {
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// 空点击事件，主要用于解决PC端H5由于无click事件导致触摸位置不准确的问题
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emptyClick(){
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},
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// 触摸事件开始
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btnTouchStart(callback) {
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// 先执行一遍方法，否则会造成松开手时，就执行了clearTimer，导致无法实现功能
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this[callback]();
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// 如果没开启长按功能，直接返回
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if (!this.longPress) return;
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clearInterval(this.timer); //再次清空定时器，防止重复注册定时器
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this.timer = null;
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this.timer = setInterval(() => {
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// 执行加或减函数
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this[callback]();
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}, this.pressTime);
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},
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// 清除定时器
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clearTimer() {
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this.$nextTick(() => {
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clearInterval(this.timer);
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this.timer = null;
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});
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},
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// 减
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minus() {
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this.computeVal('minus');
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},
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// 加
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plus() {
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this.computeVal('plus');
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},
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// 为了保证小数相加减出现精度溢出的问题
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calcPlus(num1, num2) {
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let baseNum, baseNum1, baseNum2;
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try {
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baseNum1 = num1.toString().split('.')[1].length;
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} catch (e) {
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baseNum1 = 0;
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}
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try {
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baseNum2 = num2.toString().split('.')[1].length;
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} catch (e) {
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baseNum2 = 0;
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}
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baseNum = Math.pow(10, Math.max(baseNum1, baseNum2));
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let precision = baseNum1 >= baseNum2 ? baseNum1 : baseNum2; //精度
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return ((num1 * baseNum + num2 * baseNum) / baseNum).toFixed(precision);
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},
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// 为了保证小数相加减出现精度溢出的问题
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calcMinus(num1, num2) {
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let baseNum, baseNum1, baseNum2;
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try {
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baseNum1 = num1.toString().split('.')[1].length;
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} catch (e) {
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baseNum1 = 0;
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}
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try {
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baseNum2 = num2.toString().split('.')[1].length;
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} catch (e) {
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baseNum2 = 0;
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}
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baseNum = Math.pow(10, Math.max(baseNum1, baseNum2));
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let precision = baseNum1 >= baseNum2 ? baseNum1 : baseNum2;
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return ((num1 * baseNum - num2 * baseNum) / baseNum).toFixed(precision);
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},
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computeVal(type) {
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uni.hideKeyboard();
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if (this.disabled) return;
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let value = 0;
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// 新增stepFirst开始
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// 减
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if (type === 'minus') {
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if (this.stepFirst > 0 && this.inputVal == this.stepFirst) {
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value = this.min;
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} else {
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value = this.calcMinus(this.inputVal, this.step);
|
||
|
|
}
|
||
|
|
} else if (type === 'plus') {
|
||
|
|
if (this.stepFirst > 0 && this.inputVal < this.stepFirst) {
|
||
|
|
value = this.stepFirst;
|
||
|
|
} else {
|
||
|
|
value = this.calcPlus(this.inputVal, this.step);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (this.stepStrictly) {
|
||
|
|
let strictly = value % this.step;
|
||
|
|
if (strictly > 0) {
|
||
|
|
value -= strictly;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (value > this.max) {
|
||
|
|
value = this.max;
|
||
|
|
} else if (value < this.min) {
|
||
|
|
value = this.min;
|
||
|
|
}
|
||
|
|
// 新增stepFirst结束
|
||
|
|
this.inputVal = value;
|
||
|
|
this.handleChange(value, type);
|
||
|
|
},
|
||
|
|
// 处理用户手动输入的情况
|
||
|
|
onBlur(event) {
|
||
|
|
let val = 0;
|
||
|
|
let value = event.detail.value;
|
||
|
|
// 如果为非0-9数字组成，或者其第一位数值为0，直接让其等于min值
|
||
|
|
// 这里不直接判断是否正整数，是因为用户传递的props min值可能为0
|
||
|
|
if (!/(^\d+$)/.test(value) || value[0] == 0) val = this.min;
|
||
|
|
val = +value;
|
||
|
|
|
||
|
|
// 新增stepFirst开始
|
||
|
|
if (this.stepFirst > 0 && this.inputVal < this.stepFirst && this.inputVal > 0) {
|
||
|
|
val = this.stepFirst;
|
||
|
|
}
|
||
|
|
// 新增stepFirst结束
|
||
|
|
if (this.stepStrictly) {
|
||
|
|
let strictly = val % this.step;
|
||
|
|
if (strictly > 0) {
|
||
|
|
val -= strictly;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (val > this.max) {
|
||
|
|
val = this.max;
|
||
|
|
} else if (val < this.min) {
|
||
|
|
val = this.min;
|
||
|
|
}
|
||
|
|
this.$nextTick(() => {
|
||
|
|
this.inputVal = val;
|
||
|
|
});
|
||
|
|
this.handleChange(val, 'blur');
|
||
|
|
},
|
||
|
|
handleChange(value, type) {
|
||
|
|
if (this.disabled) return;
|
||
|
|
// 清除定时器，避免造成混乱
|
||
|
|
if (this.innerChangeTimer) {
|
||
|
|
clearTimeout(this.innerChangeTimer);
|
||
|
|
this.innerChangeTimer = null;
|
||
|
|
}
|
||
|
|
// 发出input事件，修改通过v-model绑定的值，达到双向绑定的效果
|
||
|
|
this.changeFromInner = true;
|
||
|
|
// 一定时间内，清除changeFromInner标记，否则内部值改变后
|
||
|
|
// 外部通过程序修改value值，将会无效
|
||
|
|
this.innerChangeTimer = setTimeout(() => {
|
||
|
|
this.changeFromInner = false;
|
||
|
|
}, 150);
|
||
|
|
this.$emit('input', Number(value));
|
||
|
|
this.$emit('update:modelValue', Number(value));
|
||
|
|
this.$emit(type, {
|
||
|
|
// 转为Number类型
|
||
|
|
value: Number(value),
|
||
|
|
index: this.index
|
||
|
|
});
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* 验证十进制数字
|
||
|
|
*/
|
||
|
|
isNumber(value) {
|
||
|
|
return /^(?:-?\d+|-?\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/.test(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<style lang="scss" scoped>
|
||
|
|
.number-box {
|
||
|
|
display: inline-flex;
|
||
|
|
align-items: center;
|
||
|
|
box-sizing: border-box;
|
||
|
|
}
|
||
|
|
|
||
|
|
.u-number-input {
|
||
|
|
position: relative;
|
||
|
|
text-align: center;
|
||
|
|
padding: 0;
|
||
|
|
margin: 0rpx;
|
||
|
|
display: flex;
|
||
|
|
align-items: center;
|
||
|
|
justify-content: center;
|
||
|
|
border: 2rpx solid #f4f4f4;
|
||
|
|
border-left: 0;
|
||
|
|
border-right: 0;
|
||
|
|
box-sizing: border-box;
|
||
|
|
}
|
||
|
|
|
||
|
|
.u-icon-plus,
|
||
|
|
.u-icon-minus {
|
||
|
|
width: 60rpx;
|
||
|
|
display: flex;
|
||
|
|
justify-content: center;
|
||
|
|
align-items: center;
|
||
|
|
border: 2rpx solid #f4f4f4;
|
||
|
|
box-sizing: border-box;
|
||
|
|
}
|
||
|
|
|
||
|
|
.u-icon-plus {
|
||
|
|
border-radius: 0 8rpx 8rpx 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
.u-icon-minus {
|
||
|
|
border-radius: 8rpx 0 0 8rpx;
|
||
|
|
}
|
||
|
|
|
||
|
|
.u-icon-disabled {
|
||
|
|
color: #c8c9cc !important;
|
||
|
|
background-color: #f2f3f5 !important;
|
||
|
|
}
|
||
|
|
|
||
|
|
.u-input-disabled {
|
||
|
|
color: #c8c9cc !important;
|
||
|
|
background-color: #f2f3f5 !important;
|
||
|
|
}
|
||
|
|
.num-btn {
|
||
|
|
font-weight: 550;
|
||
|
|
line-height: 50rpx;
|
||
|
|
}
|
||
|
|
</style>
|