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- <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"
- <!-- #ifdef VUE3 -->
- :class="[modelValue && 'u-switch__node--on']"
- <!-- #endif -->
- <!-- #ifdef VUE2 -->
- :class="[value && 'u-switch__node--on']"
- <!-- #endif -->
- :style="[nodeStyle]"
- ref="u-switch__node"
- >
- <u-loading-icon
- :show="loading"
- mode="circle"
- timingFunction='linear'
- <!-- #ifdef VUE3 -->
- :color="modelValue ? activeColor : '#AAABAD'"
- <!-- #endif -->
- <!-- #ifdef VUE2 -->
- :color="value ? activeColor : '#AAABAD'"
- <!-- #endif -->
- :size="size * 0.6"
- />
- </view>
- </view>
- </template>
- <script>
- import props from './props.js';
- import mpMixin from '../../libs/mixin/mpMixin.js';
- import mixin from '../../libs/mixin/mixin.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://ijry.github.io/uview-plus/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: [mpMixin, mixin,props],
- watch: {
- // #ifdef VUE3
- modelValue: {
- 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')
- }
- }
- },
- // #endif
- // #ifdef VUE2
- value: {
- immediate: true,
- handler(n) {
- if(n !== this.inactiveValue && n !== this.activeValue) {
- uni.$u.error('v-model绑定的值必须为inactiveValue、activeValue二者之一')
- }
- }
- }
- // #endif
- },
- data() {
- return {
- bgColor: '#ffffff'
- }
- },
- computed: {
- isActive(){
- // #ifdef VUE3
- return this.modelValue === this.activeValue;
- // #endif
- // #ifdef VUE2
- return this.value === this.activeValue;
- // #endif
- },
- switchStyle() {
- let style = {}
- // 这里需要加2,是为了腾出边框的距离,否则圆点node会和外边框紧贴在一起
- style.width = uni.$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(${this.isActive ? 0 : 1})`
- return style
- },
- customInactiveColor() {
- // 之所以需要判断是否自定义了“非激活”颜色,是为了让node圆点离外边框更宽一点的距离
- return this.inactiveColor !== '#fff' && this.inactiveColor !== '#ffffff'
- }
- },
- // #ifdef VUE3
- emits: ['update:modelValue', 'change'],
- // #endif
- methods: {
- clickHandler() {
- if (!this.disabled && !this.loading) {
- const oldValue = this.isActive ? this.inactiveValue : this.activeValue
- if(!this.asyncChange) {
- // #ifdef VUE3
- this.$emit("update:modelValue", oldValue);
- // #endif
- // #ifdef VUE2
- this.$emit("input", oldValue);
- // #endif
- }
- // 放到下一个生命周期,因为双向绑定的value修改父组件状态需要时间,且是异步的
- this.$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>
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