| <template> | |
| 	<view | |
| 	    class="u-switch" | |
| 	    :class="[disabled && 'u-switch--disabled']" | |
| 	    :style="[switchStyle, $u.addStyle(customStyle)]" | |
| 	    @tap="clickHandler" | |
| 	> | |
| 		<view | |
| 		    class="u-switch__bg" | |
| 		    :style="[bgStyle]" | |
| 		> | |
| 		</view> | |
| 		<view | |
| 		    class="u-switch__node" | |
| 		    :class="[value && 'u-switch__node--on']" | |
| 		    :style="[nodeStyle]" | |
| 		    ref="u-switch__node" | |
| 		> | |
| 			<u-loading-icon | |
| 			    :show="loading" | |
| 			    mode="circle" | |
| 			    timingFunction='linear' | |
| 			    :color="value ? activeColor : '#AAABAD'" | |
| 			    :size="size * 0.6" | |
| 			/> | |
| 		</view> | |
| 	</view> | |
| </template> | |
| 
 | |
| <script> | |
| 	import props from './props.js'; | |
| 	/** | |
| 	 * switch 开关选择器 | |
| 	 * @description 选择开关一般用于只有两个选择,且只能选其一的场景。 | |
| 	 * @tutorial https://www.uviewui.com/components/switch.html | |
| 	 * @property {Boolean}						loading			是否处于加载中(默认 false ) | |
| 	 * @property {Boolean}						disabled		是否禁用(默认 false ) | |
| 	 * @property {String | Number}				size			开关尺寸,单位px (默认 25 ) | |
| 	 * @property {String}						activeColor		打开时的背景色 (默认 '#2979ff' ) | |
| 	 * @property {String} 						inactiveColor	关闭时的背景色 (默认 '#ffffff' ) | |
| 	 * @property {Boolean | String | Number}	value			通过v-model双向绑定的值 (默认 false ) | |
| 	 * @property {Boolean | String | Number}	activeValue		打开选择器时通过change事件发出的值 (默认 true ) | |
| 	 * @property {Boolean | String | Number}	inactiveValue	关闭选择器时通过change事件发出的值 (默认 false ) | |
| 	 * @property {Boolean}						asyncChange		是否开启异步变更,开启后需要手动控制输入值 (默认 false ) | |
| 	 * @property {String | Number}				space			圆点与外边框的距离 (默认 0 ) | |
| 	 * @property {Object}						customStyle		定义需要用到的外部样式 | |
| 	 * | |
| 	 * @event {Function} change 在switch打开或关闭时触发 | |
| 	 * @example <u-switch v-model="checked" active-color="red" inactive-color="#eee"></u-switch> | |
| 	 */ | |
| 	export default { | |
| 		name: "u-switch", | |
| 		mixins: [uni.$u.mpMixin, uni.$u.mixin,props], | |
| 		watch: { | |
| 			value: { | |
| 				immediate: true, | |
| 				handler(n) { | |
| 					if(n !== this.inactiveValue && n !== this.activeValue) { | |
| 						uni.$u.error('v-model绑定的值必须为inactiveValue、activeValue二者之一') | |
| 					} | |
| 				} | |
| 			} | |
| 		}, | |
| 		data() { | |
| 			return { | |
| 				bgColor: '#ffffff' | |
| 			} | |
| 		}, | |
| 		computed: { | |
| 			isActive(){ | |
| 				return this.value === this.activeValue; | |
| 			}, | |
| 			switchStyle() { | |
| 				let style = {} | |
| 				// 这里需要加2,是为了腾出边框的距离,否则圆点node会和外边框紧贴在一起 | |
| 				style.width = uni.$u.addUnit(this.size * 2 + 2) | |
| 				style.height = uni.$u.addUnit(Number(this.size) + 2) | |
| 				// style.borderColor = this.value ? 'rgba(0, 0, 0, 0)' : 'rgba(0, 0, 0, 0.12)' | |
| 				// 如果自定义了“非激活”演示,name边框颜色设置为透明(跟非激活颜色一致) | |
| 				// 这里不能简单的设置为非激活的颜色,否则打开状态时,会有边框,所以需要透明 | |
| 				if(this.customInactiveColor) { | |
| 					style.borderColor = 'rgba(0, 0, 0, 0)' | |
| 				} | |
| 				style.backgroundColor = this.isActive ? this.activeColor : this.inactiveColor | |
| 				return style; | |
| 			}, | |
| 			nodeStyle() { | |
| 				let style = {} | |
| 				// 如果自定义非激活颜色,将node圆点的尺寸减少两个像素,让其与外边框距离更大一点 | |
| 				style.width = uni.$u.addUnit(this.size - this.space) | |
| 				style.height = uni.$u.addUnit(this.size - this.space) | |
| 				const translateX = this.isActive ? uni.$u.addUnit(this.space) : uni.$u.addUnit(this.size); | |
| 				style.transform = `translateX(-${translateX})` | |
| 				return style | |
| 			}, | |
| 			bgStyle() { | |
| 				let style = {} | |
| 				// 这里配置一个多余的元素在HTML中,是为了让switch切换时,有更良好的背景色扩充体验(见实际效果) | |
| 				style.width = uni.$u.addUnit(Number(this.size) * 2 - this.size / 2) | |
| 				style.height = uni.$u.addUnit(this.size) | |
| 				style.backgroundColor = this.inactiveColor | |
| 				// 打开时,让此元素收缩,否则反之 | |
| 				style.transform = `scale(${this.isActive ? 0 : 1})` | |
| 				return style | |
| 			}, | |
| 			customInactiveColor() { | |
| 				// 之所以需要判断是否自定义了“非激活”颜色,是为了让node圆点离外边框更宽一点的距离 | |
| 				return this.inactiveColor !== '#fff' && this.inactiveColor !== '#ffffff' | |
| 			} | |
| 		}, | |
| 		methods: { | |
| 			clickHandler() { | |
| 				if (!this.disabled && !this.loading) { | |
| 					const oldValue = this.isActive ? this.inactiveValue : this.activeValue | |
| 					if(!this.asyncChange) { | |
| 						this.$emit('input', oldValue) | |
| 					} | |
| 					// 放到下一个生命周期,因为双向绑定的value修改父组件状态需要时间,且是异步的 | |
| 					this.$nextTick(() => { | |
| 						this.$emit('change', oldValue) | |
| 					}) | |
| 				} | |
| 			} | |
| 		} | |
| 	}; | |
| </script> | |
| 
 | |
| <style lang="scss" scoped> | |
| 	@import "../../libs/css/components.scss"; | |
| 
 | |
| 	.u-switch { | |
| 		@include flex(row); | |
| 		/* #ifndef APP-NVUE */ | |
| 		box-sizing: border-box; | |
| 		/* #endif */ | |
| 		position: relative; | |
| 		background-color: #fff; | |
| 		border-width: 1px; | |
| 		border-radius: 100px; | |
| 		transition: background-color 0.4s; | |
| 		border-color: rgba(0, 0, 0, 0.12); | |
| 		border-style: solid; | |
| 		justify-content: flex-end; | |
| 		align-items: center; | |
| 		// 由于weex为阿里逗着玩的KPI项目,导致bug奇多,这必须要写这一行, | |
| 		// 否则在iOS上,点击页面任意地方,都会触发switch的点击事件 | |
| 		overflow: hidden; | |
| 
 | |
| 		&__node { | |
| 			@include flex(row); | |
| 			align-items: center; | |
| 			justify-content: center; | |
| 			border-radius: 100px; | |
| 			background-color: #fff; | |
| 			border-radius: 100px; | |
| 			box-shadow: 1px 1px 1px 0 rgba(0, 0, 0, 0.25); | |
| 			transition-property: transform; | |
| 			transition-duration: 0.4s; | |
| 			transition-timing-function: cubic-bezier(0.3, 1.05, 0.4, 1.05); | |
| 		} | |
| 
 | |
| 		&__bg { | |
| 			position: absolute; | |
| 			border-radius: 100px; | |
| 			background-color: #FFFFFF; | |
| 			transition-property: transform; | |
| 			transition-duration: 0.4s; | |
| 			border-top-left-radius: 0; | |
| 			border-bottom-left-radius: 0; | |
| 			transition-timing-function: ease; | |
| 		} | |
| 
 | |
| 		&--disabled { | |
| 			opacity: 0.6; | |
| 		} | |
| 	} | |
| </style>
 |