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<template> <!-- #ifdef APP-NVUE --> <header> <!-- #endif --> <view class="u-index-anchor u-border-bottom" :ref="`u-index-anchor-${text}`" :style="{ height: addUnit(height), backgroundColor: bgColor }" > <text class="u-index-anchor__text" :style="{ fontSize: addUnit(size), color: color }" >{{ text }}</text> </view> <!-- #ifdef APP-NVUE --> </header> <!-- #endif --> </template>
<script> import { props } from './props'; import { mpMixin } from '../../libs/mixin/mpMixin'; import { mixin } from '../../libs/mixin/mixin'; import { addUnit, $parent, error } from '../../libs/function/index'; // #ifdef APP-NVUE
const dom = uni.requireNativePlugin('dom') // #endif
/** * IndexAnchor 列表锚点 * @description * @tutorial https://uview-plus.jiangruyi.com/components/indexList.html
* @property {String | Number} text 列表锚点文本内容 * @property {String} color 列表锚点文字颜色 ( 默认 '#606266' ) * @property {String | Number} size 列表锚点文字大小,单位默认px ( 默认 14 ) * @property {String} bgColor 列表锚点背景颜色 ( 默认 '#dedede' ) * @property {String | Number} height 列表锚点高度,单位默认px ( 默认 32 ) * @example <u-index-anchor :text="indexList[index]"></u-index-anchor> */ export default { name: 'u-index-anchor', mixins: [mpMixin, mixin, props], data() { return { } }, mounted() { this.init() }, methods: { addUnit, init() { // 此处会活动父组件实例,并赋值给实例的parent属性
const indexList = $parent.call(this, 'u-index-list') if (!indexList) { return error('u-index-anchor必须要搭配u-index-list组件使用') } // 将当前实例放入到u-index-list中
indexList.anchors.push(this) const indexListItem = $parent.call(this, 'u-index-item') // #ifndef APP-NVUE
// 只有在非nvue下,u-index-anchor才是嵌套在u-index-item中的
if (!indexListItem) { return error('u-index-anchor必须要搭配u-index-item组件使用') } // 设置u-index-item的id为anchor的text标识符,因为非nvue下滚动列表需要依赖scroll-view滚动到元素的特性
indexListItem.id = this.text.charCodeAt(0) // #endif
} }, } </script>
<style lang="scss" scoped> @import "../../libs/css/components.scss";
.u-index-anchor { position: sticky; top: 0; @include flex; align-items: center; padding-left: 15px; z-index: 1;
&__text { @include flex; align-items: center; } } </style>
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