| <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.$parent.call(this, 'u-collapse'); | 
|                 if(this.parent) { | 
|                     this.nameSync = this.name ? this.name : this.parent.childrens.length; | 
|                     this.parent.childrens.push(this); | 
|                     this.headStyle = this.parent.headStyle; | 
|                     this.bodyStyle = this.parent.bodyStyle; | 
|                     this.arrowColor = this.parent.arrowColor; | 
|                     this.hoverClass = this.parent.hoverClass; | 
|                     this.arrow = this.parent.arrow; | 
|                     this.itemStyle = this.parent.itemStyle; | 
|                 } | 
|                 this.$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> |