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			109 lines
		
	
	
		
			3.8 KiB
		
	
	
	
		
			Vue
		
	
	
	
	
	
		
		
			
		
	
	
			109 lines
		
	
	
		
			3.8 KiB
		
	
	
	
		
			Vue
		
	
	
	
	
	
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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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