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157 lines
4.4 KiB
157 lines
4.4 KiB
<template> |
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<view class="u-read-more"> |
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<view |
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class="u-read-more__content" |
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:style="{ |
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height: isLongContent && status === 'close' ? $u.addUnit(showHeight) : $u.addUnit(contentHeight), |
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textIndent: textIndent |
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}" |
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> |
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<view |
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class="u-read-more__content__inner" |
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ref="u-read-more__content__inner" |
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:class="[elId]" |
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> |
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<slot></slot> |
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</view> |
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</view> |
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<view |
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class="u-read-more__toggle" |
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:style="[innerShadowStyle]" |
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v-if="isLongContent" |
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> |
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<slot name="toggle"> |
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<view |
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class="u-read-more__toggle__text" |
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@tap="toggleReadMore" |
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> |
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<u--text |
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:text="status === 'close' ? closeText : openText" |
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:color="color" |
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:size="fontSize" |
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:lineHeight="fontSize" |
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margin="0 5px 0 0" |
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></u--text> |
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<view class="u-read-more__toggle__icon"> |
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<u-icon |
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:color="color" |
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:size="fontSize + 2" |
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:name="status === 'close' ? 'arrow-down' : 'arrow-up'" |
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></u-icon> |
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</view> |
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</view> |
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</slot> |
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</view> |
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</view> |
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</template> |
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<script> |
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// #ifdef APP-NVUE |
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const dom = uni.requireNativePlugin('dom') |
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// #endif |
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import props from './props.js'; |
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/** |
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* readMore 阅读更多 |
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* @description 该组件一般用于内容较长,预先收起一部分,点击展开全部内容的场景。 |
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* @tutorial https://www.uviewui.com/components/readMore.html |
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* @property {String | Number} showHeight 内容超出此高度才会显示展开全文按钮,单位px(默认 400 ) |
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* @property {Boolean} toggle 展开后是否显示收起按钮(默认 false ) |
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* @property {String} closeText 关闭时的提示文字(默认 '展开阅读全文' ) |
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* @property {String} openText 展开时的提示文字(默认 '收起' ) |
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* @property {String} color 提示文字的颜色(默认 '#2979ff' ) |
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* @property {String | Number} fontSize 提示文字的大小,单位px (默认 14 ) |
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* @property {Object} shadowStyle 显示阴影的样式 |
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* @property {String} textIndent 段落首行缩进的字符个数 (默认 '2em' ) |
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* @property {String | Number} name 用于在 open 和 close 事件中当作回调参数返回 |
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* @event {Function} open 内容被展开时触发 |
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* @event {Function} close 内容被收起时触发 |
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* @example <u-read-more><rich-text :nodes="content"></rich-text></u-read-more> |
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*/ |
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export default { |
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name: 'u-read-more', |
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mixins: [uni.$u.mpMixin, uni.$u.mixin, props], |
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data() { |
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return { |
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isLongContent: false, // 是否需要隐藏一部分内容 |
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status: 'close', // 当前隐藏与显示的状态,close-收起状态,open-展开状态 |
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elId: uni.$u.guid(), // 生成唯一class |
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contentHeight: 100, // 内容高度 |
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} |
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}, |
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computed: { |
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// 展开后无需阴影,收起时才需要阴影样式 |
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innerShadowStyle() { |
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if (this.status === 'open') return {} |
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else return this.shadowStyle |
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} |
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}, |
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mounted() { |
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this.init() |
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}, |
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methods: { |
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async init() { |
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this.getContentHeight().then(height => { |
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this.contentHeight = height |
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// 判断高度,如果真实内容高度大于占位高度,则显示收起与展开的控制按钮 |
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if (height > uni.$u.getPx(this.showHeight)) { |
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this.isLongContent = true |
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this.status = 'close' |
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} |
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}) |
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}, |
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// 获取内容的高度 |
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async getContentHeight() { |
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// 延时一定时间再获取节点 |
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await uni.$u.sleep(30) |
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return new Promise(resolve => { |
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// #ifndef APP-NVUE |
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this.$uGetRect('.' + this.elId).then(res => { |
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resolve(res.height) |
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}) |
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// #endif |
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// #ifdef APP-NVUE |
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const ref = this.$refs['u-read-more__content__inner'] |
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dom.getComponentRect(ref, (res) => { |
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resolve(res.size.height) |
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}) |
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// #endif |
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}) |
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}, |
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// 展开或者收起 |
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toggleReadMore() { |
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this.status = this.status === 'close' ? 'open' : 'close' |
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// 如果toggle为false,隐藏"收起"部分的内容 |
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if (this.toggle == false) this.isLongContent = false |
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// 发出打开或者收齐的事件 |
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this.$emit(this.status, this.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-read-more { |
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&__content { |
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overflow: hidden; |
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color: $u-content-color; |
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font-size: 15px; |
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text-align: left; |
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} |
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&__toggle { |
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@include flex; |
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justify-content: center; |
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&__text { |
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@include flex; |
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align-items: center; |
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justify-content: center; |
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margin-top: 5px; |
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} |
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} |
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} |
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</style>
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