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