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<template>
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<!-- #ifdef APP-NVUE -->
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<cell ref="u-index-item">
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<!-- #endif -->
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<view
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class="u-index-item"
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:id="`u-index-item-${id}`"
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:class="[`u-index-item-${id}`]"
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>
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<slot />
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</view>
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<!-- #ifdef APP-NVUE -->
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</cell>
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<!-- #endif -->
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</template>
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<script>
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import props from './props.js';
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// #ifdef APP-NVUE
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// 由于weex为阿里的KPI业绩考核的产物，所以不支持百分比单位，这里需要通过dom查询组件的宽度
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const dom = uni.requireNativePlugin('dom')
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// #endif
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/**
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* IndexItem
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* @description
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* @tutorial https://uviewui.com/components/indexList.html
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* @property {String}
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* @event {Function}
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* @example
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*/
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export default {
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name: 'u-index-item',
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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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// 本组件到滚动条顶部的距离
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top: 0,
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height: 0,
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id: ''
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}
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},
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created() {
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// 子组件u-index-anchor的实例
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this.anchor = {}
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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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init() {
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// 此处会活动父组件实例，并赋值给实例的parent属性
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this.getParentData('u-index-list')
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if (!this.parent) {
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return uni.$u.error('u-index-item必须要搭配u-index-list组件使用')
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}
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uni.$u.sleep().then(() =>{
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this.getIndexItemRect().then(size => {
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// 由于对象的引用特性，此处会同时生效到父组件的children数组的本实例的top属性中，供父组件判断读取
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this.top = Math.ceil(size.top)
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this.height = Math.ceil(size.height)
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})
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})
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},
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getIndexItemRect() {
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return new Promise(resolve => {
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// #ifndef APP-NVUE
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this.$uGetRect('.u-index-item').then(size => {
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resolve(size)
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})
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// #endif
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// #ifdef APP-NVUE
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const ref = this.$refs['u-index-item']
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dom.getComponentRect(ref, res => {
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resolve(res.size)
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})
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// #endif
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})
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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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</style>
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