| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416 | <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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