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177 lines
6.0 KiB
177 lines
6.0 KiB
<template> |
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<view |
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class="u-switch" |
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:class="[disabled && 'u-switch--disabled']" |
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:style="[switchStyle, $u.addStyle(customStyle)]" |
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@tap="clickHandler" |
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> |
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<view |
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class="u-switch__bg" |
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:style="[bgStyle]" |
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> |
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</view> |
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<view |
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class="u-switch__node" |
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:class="[value && 'u-switch__node--on']" |
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:style="[nodeStyle]" |
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ref="u-switch__node" |
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> |
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<u-loading-icon |
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:show="loading" |
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mode="circle" |
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timingFunction='linear' |
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:color="value ? activeColor : '#AAABAD'" |
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:size="size * 0.6" |
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/> |
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</view> |
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</view> |
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</template> |
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<script> |
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import props from './props.js'; |
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/** |
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* switch 开关选择器 |
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* @description 选择开关一般用于只有两个选择,且只能选其一的场景。 |
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* @tutorial https://www.uviewui.com/components/switch.html |
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* @property {Boolean} loading 是否处于加载中(默认 false ) |
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* @property {Boolean} disabled 是否禁用(默认 false ) |
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* @property {String | Number} size 开关尺寸,单位px (默认 25 ) |
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* @property {String} activeColor 打开时的背景色 (默认 '#2979ff' ) |
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* @property {String} inactiveColor 关闭时的背景色 (默认 '#ffffff' ) |
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* @property {Boolean | String | Number} value 通过v-model双向绑定的值 (默认 false ) |
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* @property {Boolean | String | Number} activeValue 打开选择器时通过change事件发出的值 (默认 true ) |
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* @property {Boolean | String | Number} inactiveValue 关闭选择器时通过change事件发出的值 (默认 false ) |
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* @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 ) |
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* @property {String | Number} space 圆点与外边框的距离 (默认 0 ) |
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* @property {Object} customStyle 定义需要用到的外部样式 |
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* |
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* @event {Function} change 在switch打开或关闭时触发 |
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* @example <u-switch v-model="checked" active-color="red" inactive-color="#eee"></u-switch> |
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*/ |
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export default { |
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name: "u-switch", |
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mixins: [uni.$u.mpMixin, uni.$u.mixin,props], |
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watch: { |
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value: { |
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immediate: true, |
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handler(n) { |
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if(n !== this.inactiveValue && n !== this.activeValue) { |
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uni.$u.error('v-model绑定的值必须为inactiveValue、activeValue二者之一') |
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} |
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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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bgColor: '#ffffff' |
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} |
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}, |
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computed: { |
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isActive(){ |
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return this.value === this.activeValue; |
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}, |
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switchStyle() { |
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let style = {} |
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// 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 |
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style.width = uni.$u.addUnit(this.size * 2 + 2) |
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style.height = uni.$u.addUnit(Number(this.size) + 2) |
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// style.borderColor = this.value ? 'rgba(0, 0, 0, 0)' : 'rgba(0, 0, 0, 0.12)' |
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// 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) |
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// 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 |
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if(this.customInactiveColor) { |
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style.borderColor = 'rgba(0, 0, 0, 0)' |
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} |
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style.backgroundColor = this.isActive ? this.activeColor : this.inactiveColor |
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return style; |
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}, |
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nodeStyle() { |
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let style = {} |
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// 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 |
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style.width = uni.$u.addUnit(this.size - this.space) |
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style.height = uni.$u.addUnit(this.size - this.space) |
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const translateX = this.isActive ? uni.$u.addUnit(this.space) : uni.$u.addUnit(this.size); |
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style.transform = `translateX(-${translateX})` |
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return style |
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}, |
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bgStyle() { |
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let style = {} |
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// 这里配置一个多余的元素在HTML中,是为了让switch切换时,有更良好的背景色扩充体验(见实际效果) |
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style.width = uni.$u.addUnit(Number(this.size) * 2 - this.size / 2) |
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style.height = uni.$u.addUnit(this.size) |
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style.backgroundColor = this.inactiveColor |
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// 打开时,让此元素收缩,否则反之 |
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style.transform = `scale(${this.isActive ? 0 : 1})` |
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return style |
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}, |
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customInactiveColor() { |
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// 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 |
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return this.inactiveColor !== '#fff' && this.inactiveColor !== '#ffffff' |
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} |
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}, |
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methods: { |
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clickHandler() { |
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if (!this.disabled && !this.loading) { |
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const oldValue = this.isActive ? this.inactiveValue : this.activeValue |
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if(!this.asyncChange) { |
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this.$emit('input', oldValue) |
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} |
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// 放到下一个生命周期,因为双向绑定的value修改父组件状态需要时间,且是异步的 |
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this.$nextTick(() => { |
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this.$emit('change', oldValue) |
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}) |
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} |
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} |
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} |
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}; |
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</script> |
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<style lang="scss" scoped> |
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@import "../../libs/css/components.scss"; |
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.u-switch { |
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@include flex(row); |
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/* #ifndef APP-NVUE */ |
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box-sizing: border-box; |
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/* #endif */ |
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position: relative; |
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background-color: #fff; |
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border-width: 1px; |
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border-radius: 100px; |
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transition: background-color 0.4s; |
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border-color: rgba(0, 0, 0, 0.12); |
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border-style: solid; |
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justify-content: flex-end; |
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align-items: center; |
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// 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, |
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// 否则在iOS上,点击页面任意地方,都会触发switch的点击事件 |
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overflow: hidden; |
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&__node { |
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@include flex(row); |
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align-items: center; |
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justify-content: center; |
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border-radius: 100px; |
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background-color: #fff; |
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border-radius: 100px; |
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box-shadow: 1px 1px 1px 0 rgba(0, 0, 0, 0.25); |
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transition-property: transform; |
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transition-duration: 0.4s; |
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transition-timing-function: cubic-bezier(0.3, 1.05, 0.4, 1.05); |
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} |
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&__bg { |
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position: absolute; |
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border-radius: 100px; |
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background-color: #FFFFFF; |
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transition-property: transform; |
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transition-duration: 0.4s; |
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border-top-left-radius: 0; |
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border-bottom-left-radius: 0; |
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transition-timing-function: ease; |
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} |
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&--disabled { |
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opacity: 0.6; |
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} |
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} |
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</style>
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