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<template> <view class="u-collapse-item" :style="[itemStyle]"> <view :hover-stay-time="200" class="u-collapse-head" @tap.stop="headClick" :hover-class="hoverClass" :style="[headStyle]"> <block v-if="!$slots['title-all']"> <view v-if="!$slots['title']" class="u-collapse-title u-line-1" :style="[{ textAlign: align ? align : 'left' }, isShow && activeStyle && !arrow ? activeStyle : '']"> {{ title }} </view> <slot v-else name="title" /> <view class="u-icon-wrap"> <u-icon v-if="arrow" :color="arrowColor" :class="{ 'u-arrow-down-icon-active': isShow }" class="u-arrow-down-icon" name="arrow-down"></u-icon> </view> </block> <slot v-else name="title-all" /> </view> <view class="u-collapse-body" :style="[{ height: isShow ? height + 'px' : '0' }]"> <view class="u-collapse-content" :id="elId" :style="[bodyStyle]"> <slot></slot> </view> </view> </view> </template>
<script> /** * collapseItem 手风琴Item * @description 通过折叠面板收纳内容区域(搭配u-collapse使用) * @tutorial https://www.uviewui.com/components/collapse.html
* @property {String} title 面板标题 * @property {String Number} index 主要用于事件的回调,标识那个Item被点击 * @property {Boolean} disabled 面板是否可以打开或收起(默认false) * @property {Boolean} open 设置某个面板的初始状态是否打开(默认false) * @property {String Number} name 唯一标识符,如不设置,默认用当前collapse-item的索引值 * @property {String} align 标题的对齐方式(默认left) * @property {Object} active-style 不显示箭头时,可以添加当前选择的collapse-item活动样式,对象形式 * @event {Function} change 某个item被打开或者收起时触发 * @example <u-collapse-item :title="item.head" v-for="(item, index) in itemList" :key="index">{{item.body}}</u-collapse-item> */ export default { name: "u-collapse-item", props: { // 标题
title: { type: String, default: '' }, // 标题的对齐方式
align: { type: String, default: 'left' }, // 是否可以点击收起
disabled: { type: Boolean, default: false }, // collapse显示与否
open: { type: Boolean, default: false }, // 唯一标识符
name: { type: [Number, String], default: '' }, //活动样式
activeStyle: { type: Object, default () { return {} } }, // 标识当前为第几个
index: { type: [String, Number], default: '' } }, data() { return { isShow: false, elId: this.$u.guid(), height: 0, // body内容的高度
headStyle: {}, // 头部样式,对象形式
bodyStyle: {}, // 主体部分样式
itemStyle: {}, // 每个item的整体样式
arrowColor: '', // 箭头的颜色
hoverClass: '', // 头部按下时的效果样式类
arrow: true, // 是否显示右侧箭头
}; }, watch: { open(val) { this.isShow = val; } }, created() { this.parent = false; // 获取u-collapse的信息,放在u-collapse是为了方便,不用每个u-collapse-item写一遍
this.isShow = this.open; }, methods: { // 异步获取内容,或者动态修改了内容时,需要重新初始化
init() { this.parent = this.$u.$parent.call(this, 'u-collapse'); if(this.parent) { this.nameSync = this.name ? this.name : this.parent.childrens.length; // 不存在时才添加本实例
!this.parent.childrens.includes(this) && this.parent.childrens.push(this); this.headStyle = this.parent.headStyle; this.bodyStyle = this.parent.bodyStyle; this.arrowColor = this.parent.arrowColor; this.hoverClass = this.parent.hoverClass; this.arrow = this.parent.arrow; this.itemStyle = this.parent.itemStyle; } this.$nextTick(() => { this.queryRect(); }); }, // 点击collapsehead头部
headClick() { if (this.disabled) return; if (this.parent && this.parent.accordion == true) { this.parent.childrens.map(val => { // 自身不设置为false,因为后面有this.isShow = !this.isShow;处理了
if (this != val) { val.isShow = false; } }); }
this.isShow = !this.isShow; // 触发本组件的事件
this.$emit('change', { index: this.index, show: this.isShow }) // 只有在打开时才发出事件
if (this.isShow) this.parent && this.parent.onChange(); this.$forceUpdate(); }, // 查询内容高度
queryRect() { // $uGetRect为uView自带的节点查询简化方法,详见文档介绍:https://www.uviewui.com/js/getRect.html
// 组件内部一般用this.$uGetRect,对外的为this.$u.getRect,二者功能一致,名称不同
this.$uGetRect('#' + this.elId).then(res => { this.height = res.height; }) } }, mounted() { this.init(); } }; </script>
<style lang="scss" scoped> @import "../../libs/css/style.components.scss"; .u-collapse-head { position: relative; @include vue-flex; justify-content: space-between; align-items: center; color: $u-main-color; font-size: 30rpx; line-height: 1; padding: 24rpx 0; text-align: left; }
.u-collapse-title { flex: 1; overflow: hidden; }
.u-arrow-down-icon { transition: all 0.3s; margin-right: 20rpx; margin-left: 14rpx; }
.u-arrow-down-icon-active { transform: rotate(180deg); transform-origin: center center; }
.u-collapse-body { overflow: hidden; transition: all 0.3s; }
.u-collapse-content { overflow: hidden; font-size: 28rpx; color: $u-tips-color; text-align: left; } </style>
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