New file |
| | |
| | | <template> |
| | | <view class="u-collapse"> |
| | | <u-line v-if="border"></u-line> |
| | | <slot /> |
| | | </view> |
| | | </template> |
| | | |
| | | <script> |
| | | import props from './props.js'; |
| | | /** |
| | | * collapse 折叠面板 |
| | | * @description 通过折叠面板收纳内容区域 |
| | | * @tutorial https://www.uviewui.com/components/collapse.html |
| | | * @property {String | Number | Array} value 当前展开面板的name,非手风琴模式:[<string | number>],手风琴模式:string | number |
| | | * @property {Boolean} accordion 是否手风琴模式( 默认 false ) |
| | | * @property {Boolean} border 是否显示外边框 ( 默认 true ) |
| | | * @event {Function} change 当前激活面板展开时触发(如果是手风琴模式,参数activeNames类型为String,否则为Array) |
| | | * @example <u-collapse></u-collapse> |
| | | */ |
| | | export default { |
| | | name: "u-collapse", |
| | | mixins: [uni.$u.mpMixin, uni.$u.mixin,props], |
| | | watch: { |
| | | needInit() { |
| | | this.init() |
| | | } |
| | | }, |
| | | created() { |
| | | this.children = [] |
| | | }, |
| | | computed: { |
| | | needInit() { |
| | | // 通过computed,同时监听accordion和value值的变化 |
| | | // 再通过watch去执行init()方法,进行再一次的初始化 |
| | | return [this.accordion, this.value] |
| | | } |
| | | }, |
| | | watch: { |
| | | // 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 |
| | | parentData() { |
| | | if (this.children.length) { |
| | | this.children.map(child => { |
| | | // 判断子组件(u-checkbox)如果有updateParentData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) |
| | | typeof(child.updateParentData) === 'function' && child.updateParentData() |
| | | }) |
| | | } |
| | | }, |
| | | }, |
| | | methods: { |
| | | // 重新初始化一次内部的所有子元素 |
| | | init() { |
| | | this.children.map(child => { |
| | | child.init() |
| | | }) |
| | | }, |
| | | /** |
| | | * collapse-item被点击时触发,由collapse统一处理各子组件的状态 |
| | | * @param {Object} target 被操作的面板的实例 |
| | | */ |
| | | onChange(target) { |
| | | let changeArr = [] |
| | | this.children.map((child, index) => { |
| | | // 如果是手风琴模式,将其他的折叠面板收起来 |
| | | if (this.accordion) { |
| | | child.expanded = child === target ? !target.expanded : false |
| | | child.setContentAnimate() |
| | | } else { |
| | | if(child === target) { |
| | | child.expanded = !child.expanded |
| | | child.setContentAnimate() |
| | | } |
| | | } |
| | | // 拼接change事件中,数组元素的状态 |
| | | changeArr.push({ |
| | | // 如果没有定义name属性,则默认返回组件的index索引 |
| | | name: child.name || index, |
| | | status: child.expanded ? 'open' : 'close' |
| | | }) |
| | | }) |
| | | |
| | | this.$emit('change', changeArr) |
| | | this.$emit(target.expanded ? 'open' : 'close', target.name) |
| | | } |
| | | } |
| | | } |
| | | </script> |
| | | |
| | | <style lang="scss" scoped> |
| | | @import "../../libs/css/components.scss"; |
| | | </style> |