<template> <uni-shadow-root class="vant-slider-index"><view :class="'custom-class '+(utils.bem('slider', { disabled, vertical }))" :style="wrapperStyle" @click="onClick"> <view :class="utils.bem('slider__bar')" :style="(barStyle)+'; '+(style({ backgroundColor: activeColor }))"> <view v-if="range" :class="utils.bem('slider__button-wrapper-left')" :data-index="0" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd"> <slot v-if="useButtonSlot" name="left-button"></slot> <view v-else :class="utils.bem('slider__button')"></view> </view> <view v-if="range" :class="utils.bem('slider__button-wrapper-right')" :data-index="1" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd"> <slot v-if="useButtonSlot" name="right-button"></slot> <view v-else :class="utils.bem('slider__button')"></view> </view> <view v-if="(!range)" :class="utils.bem('slider__button-wrapper')" @touchstart="onTouchStart" @touchmove.stop.prevent="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd"> <slot v-if="useButtonSlot" name="button"></slot> <view v-else :class="utils.bem('slider__button')"></view> </view> </view> </view></uni-shadow-root> </template> <wxs src="../wxs/utils.wxs" module="utils"></wxs><wxs src="../wxs/style.wxs" module="style"></wxs> <script> global['__wxRoute'] = 'vant/slider/index' import { VantComponent } from '../common/component'; import { touch } from '../mixins/touch'; import { canIUseModel } from '../common/version'; import { getRect, addUnit, nextTick, addNumber, clamp } from '../common/utils'; const DRAG_STATUS = { START: 'start', MOVING: 'moving', END: 'end', }; VantComponent({ mixins: [touch], props: { range: Boolean, disabled: Boolean, useButtonSlot: Boolean, activeColor: String, inactiveColor: String, max: { type: Number, value: 100, }, min: { type: Number, value: 0, }, step: { type: Number, value: 1, }, value: { type: null, value: 0, observer(val) { if (val !== this.value) { this.updateValue(val); } }, }, vertical: Boolean, barHeight: null, }, created() { this.updateValue(this.data.value); }, methods: { onTouchStart(event) { if (this.data.disabled) return; const { index } = event.currentTarget.dataset; if (typeof index === 'number') { this.buttonIndex = index; } this.touchStart(event); this.startValue = this.format(this.value); this.newValue = this.value; if (this.isRange(this.newValue)) { this.startValue = this.newValue.map((val) => this.format(val)); } else { this.startValue = this.format(this.newValue); } this.dragStatus = DRAG_STATUS.START; }, onTouchMove(event) { if (this.data.disabled) return; if (this.dragStatus === DRAG_STATUS.START) { this.$emit('drag-start'); } this.touchMove(event); this.dragStatus = DRAG_STATUS.MOVING; getRect(this, '.van-slider').then((rect) => { const { vertical } = this.data; const delta = vertical ? this.deltaY : this.deltaX; const total = vertical ? rect.height : rect.width; const diff = (delta / total) * this.getRange(); if (this.isRange(this.startValue)) { this.newValue[this.buttonIndex] = this.startValue[this.buttonIndex] + diff; } else { this.newValue = this.startValue + diff; } this.updateValue(this.newValue, false, true); }); }, onTouchEnd() { if (this.data.disabled) return; if (this.dragStatus === DRAG_STATUS.MOVING) { this.dragStatus = DRAG_STATUS.END; nextTick(() => { this.updateValue(this.newValue, true); this.$emit('drag-end'); }); } }, onClick(event) { if (this.data.disabled) return; const { min } = this.data; getRect(this, '.van-slider').then((rect) => { const { vertical } = this.data; const touch = event.touches[0]; const delta = vertical ? touch.clientY - rect.top : touch.clientX - rect.left; const total = vertical ? rect.height : rect.width; const value = Number(min) + (delta / total) * this.getRange(); if (this.isRange(this.value)) { const [left, right] = this.value; const middle = (left + right) / 2; if (value <= middle) { this.updateValue([value, right], true); } else { this.updateValue([left, value], true); } } else { this.updateValue(value, true); } }); }, isRange(val) { const { range } = this.data; return range && Array.isArray(val); }, handleOverlap(value) { if (value[0] > value[1]) { return value.slice(0).reverse(); } return value; }, updateValue(value, end, drag) { if (this.isRange(value)) { value = this.handleOverlap(value).map((val) => this.format(val)); } else { value = this.format(value); } this.value = value; const { vertical } = this.data; const mainAxis = vertical ? 'height' : 'width'; this.setData({ wrapperStyle: ` background: ${this.data.inactiveColor || ''}; ${vertical ? 'width' : 'height'}: ${addUnit(this.data.barHeight) || ''}; `, barStyle: ` ${mainAxis}: ${this.calcMainAxis()}; left: ${vertical ? 0 : this.calcOffset()}; top: ${vertical ? this.calcOffset() : 0}; ${drag ? 'transition: none;' : ''} `, }); if (drag) { this.$emit('drag', { value }); } if (end) { this.$emit('change', value); } if ((drag || end) && canIUseModel()) { this.setData({ value }); } }, getScope() { return Number(this.data.max) - Number(this.data.min); }, getRange() { const { max, min } = this.data; return max - min; }, getOffsetWidth(current, min) { const scope = this.getScope(); // 避免最小值小于最小step时出现负数情况 return `${Math.max(((current - min) * 100) / scope, 0)}%`; }, // 计算选中条的长度百分比 calcMainAxis() { const { value } = this; const { min } = this.data; if (this.isRange(value)) { return this.getOffsetWidth(value[1], value[0]); } return this.getOffsetWidth(value, Number(min)); }, // 计算选中条的开始位置的偏移量 calcOffset() { const { value } = this; const { min } = this.data; const scope = this.getScope(); if (this.isRange(value)) { return `${((value[0] - Number(min)) * 100) / scope}%`; } return '0%'; }, format(value) { const min = +this.data.min; const max = +this.data.max; const step = +this.data.step; value = clamp(value, min, max); const diff = Math.round((value - min) / step) * step; return addNumber(min, diff); }, }, }); export default global['__wxComponents']['vant/slider/index'] </script> <style platform="mp-weixin"> @import '../common/index.css';.van-slider{background-color:var(--slider-inactive-background-color,#ebedf0);border-radius:999px;height:var(--slider-bar-height,2px);position:relative}.van-slider:before{bottom:calc(var(--padding-xs, 8px)*-1);content:"";left:0;position:absolute;right:0;top:calc(var(--padding-xs, 8px)*-1)}.van-slider__bar{background-color:var(--slider-active-background-color,#1989fa);border-radius:inherit;height:100%;position:relative;transition:all .2s;width:100%}.van-slider__button{background-color:var(--slider-button-background-color,#fff);border-radius:var(--slider-button-border-radius,50%);box-shadow:var(--slider-button-box-shadow,0 1px 2px rgba(0,0,0,.5));height:var(--slider-button-height,24px);width:var(--slider-button-width,24px)}.van-slider__button-wrapper,.van-slider__button-wrapper-right{position:absolute;right:0;top:50%;transform:translate3d(50%,-50%,0)}.van-slider__button-wrapper-left{left:0;position:absolute;top:50%;transform:translate3d(-50%,-50%,0)}.van-slider--disabled{opacity:var(--slider-disabled-opacity,.5)}.van-slider--vertical{display:inline-block;height:100%;width:var(--slider-bar-height,2px)}.van-slider--vertical .van-slider__button-wrapper,.van-slider--vertical .van-slider__button-wrapper-right{bottom:0;right:50%;top:auto;transform:translate3d(50%,50%,0)}.van-slider--vertical .van-slider__button-wrapper-left{left:auto;right:50%;top:0;transform:translate3d(50%,-50%,0)}.van-slider--vertical:before{bottom:0;left:-8px;right:-8px;top:0} </style>