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<template>
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<view
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class="u-radio-group"
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:class="bemClass"
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>
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<slot></slot>
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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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* radioRroup 单选框父组件
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* @description 单选框用于有一个选择,用户只能选择其中一个的场景。搭配u-radio使用
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* @tutorial https://www.uviewui.com/components/radio.html
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* @property {String | Number | Boolean} value 绑定的值
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* @property {Boolean} disabled 是否禁用所有radio(默认 false )
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* @property {String} shape 外观形状,shape-方形,circle-圆形(默认 circle )
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* @property {String} activeColor 选中时的颜色,应用到所有子Radio组件(默认 '#2979ff' )
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* @property {String} inactiveColor 未选中的颜色 (默认 '#c8c9cc' )
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* @property {String} name 标识符
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* @property {String | Number} size 组件整体的大小,单位px(默认 18 )
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* @property {String} placement 布局方式,row-横向,column-纵向 (默认 'row' )
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* @property {String} label 文本
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* @property {String} labelColor label的颜色 (默认 '#303133' )
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* @property {String | Number} labelSize label的字体大小,px单位 (默认 14 )
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* @property {Boolean} labelDisabled 是否禁止点击文本操作checkbox(默认 false )
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* @property {String} iconColor 图标颜色 (默认 '#ffffff' )
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* @property {String | Number} iconSize 图标的大小,单位px (默认 12 )
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* @property {Boolean} borderBottom placement为row时,是否显示下边框 (默认 false )
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* @property {String} iconPlacement 图标与文字的对齐方式 (默认 'left' )
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* @property {Object} customStyle 组件的样式,对象形式
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* @event {Function} change 任一个radio状态发生变化时触发
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* @example <u-radio-group v-model="value"></u-radio-group>
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*/
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export default {
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name: 'u-radio-group',
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mixins: [uni.$u.mpMixin, uni.$u.mixin,props],
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computed: {
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// 这里computed的变量,都是子组件u-radio需要用到的,由于头条小程序的兼容性差异,子组件无法实时监听父组件参数的变化
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// 所以需要手动通知子组件,这里返回一个parentData变量,供watch监听,在其中去通知每一个子组件重新从父组件(u-radio-group)
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// 拉取父组件新的变化后的参数
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parentData() {
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return [this.value, this.disabled, this.inactiveColor, this.activeColor, this.size, this.labelDisabled, this.shape,
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this.iconSize, this.borderBottom, this.placement
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]
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},
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bemClass() {
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// this.bem为一个computed变量,在mixin中
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return this.bem('radio-group', ['placement'])
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},
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},
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watch: {
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// 当父组件需要子组件需要共享的参数发生了变化,手动通知子组件
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parentData() {
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if (this.children.length) {
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this.children.map(child => {
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// 判断子组件(u-radio)如果有init方法的话,就就执行(执行的结果是子组件重新从父组件拉取了最新的值)
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typeof(child.init) === 'function' && child.init()
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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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}
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},
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created() {
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this.children = []
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},
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methods: {
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// 将其他的radio设置为未选中的状态
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unCheckedOther(childInstance) {
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this.children.map(child => {
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// 所有子radio中,被操作组件实例的checked的值无需修改
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if (childInstance !== child) {
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child.checked = false
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}
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})
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const {
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name
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} = childInstance
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// 通过emit事件,设置父组件通过v-model双向绑定的值
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this.$emit('input', name)
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// 发出事件
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this.$emit('change', name)
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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-radio-group {
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flex: 1;
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&--row {
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@include flex;
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}
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&--column {
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@include flex(column);
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}
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}
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</style>
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