New file |
| | |
| | | <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> |