| <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>
 |