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341 lines
9.7 KiB
Vue
341 lines
9.7 KiB
Vue
<template>
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<view class="u-swiper-wrap" :style="{
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borderRadius: `${borderRadius}rpx`
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}">
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<swiper :current="elCurrent" @change="change" @animationfinish="animationfinish" :interval="interval" :circular="circular" :duration="duration" :autoplay="autoplay"
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:previous-margin="effect3d ? effect3dPreviousMargin + 'rpx' : '0'" :next-margin="effect3d ? effect3dPreviousMargin + 'rpx' : '0'"
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:style="{
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height: height + 'rpx',
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backgroundColor: bgColor
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}">
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<swiper-item class="u-swiper-item" v-for="(item, index) in list" :key="index">
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<view class="u-list-image-wrap" @tap.stop.prevent="listClick(index)" :class="[uCurrent != index ? 'u-list-scale' : '']" :style="{
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borderRadius: `${borderRadius}rpx`,
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transform: effect3d && uCurrent != index ? 'scaleY(0.9)' : 'scaleY(1)',
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margin: effect3d && uCurrent != index ? '0 20rpx' : 0,
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}">
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<image class="u-swiper-image" :src="item[name] || item" :mode="imgMode"></image>
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<view v-if="title && item.title" class="u-swiper-title u-line-1" :style="[{
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'padding-bottom': titlePaddingBottom
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}, titleStyle]">
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{{ item.title }}
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</view>
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</view>
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</swiper-item>
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</swiper>
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<view class="u-swiper-indicator" :style="{
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top: indicatorPos == 'topLeft' || indicatorPos == 'topCenter' || indicatorPos == 'topRight' ? '12rpx' : 'auto',
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bottom: indicatorPos == 'bottomLeft' || indicatorPos == 'bottomCenter' || indicatorPos == 'bottomRight' ? '12rpx' : 'auto',
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justifyContent: justifyContent,
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padding: `0 ${effect3d ? '74rpx' : '24rpx'}`
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}">
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<block v-if="mode == 'rect'">
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<view class="u-indicator-item-rect" :class="{ 'u-indicator-item-rect-active': index == uCurrent }" v-for="(item, index) in list"
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:key="index"></view>
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</block>
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<block v-if="mode == 'dot'">
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<view class="u-indicator-item-dot" :class="{ 'u-indicator-item-dot-active': index == uCurrent }" v-for="(item, index) in list"
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:key="index"></view>
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</block>
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<block v-if="mode == 'round'">
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<view class="u-indicator-item-round" :class="{ 'u-indicator-item-round-active': index == uCurrent }" v-for="(item, index) in list"
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:key="index"></view>
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</block>
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<block v-if="mode == 'number'">
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<view class="u-indicator-item-number">{{ uCurrent + 1 }}/{{ list.length }}</view>
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</block>
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</view>
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</view>
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</template>
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<script>
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/**
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* swiper 轮播图
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* @description 该组件一般用于导航轮播，广告展示等场景,可开箱即用
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* @tutorial https://www.uviewui.com/components/swiper.html
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* @property {Array} list 轮播图数据，见官网"基本使用"说明
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* @property {Boolean} title 是否显示标题文字，需要配合list参数，见官网说明（默认false）
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* @property {String} mode 指示器模式，见官网说明（默认round）
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* @property {String Number} height 轮播图组件高度，单位rpx（默认250）
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* @property {String} indicator-pos 指示器的位置（默认bottomCenter）
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* @property {Boolean} effect3d 是否开启3D效果（默认false）
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* @property {Boolean} autoplay 是否自动播放（默认true）
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* @property {String Number} interval 自动轮播时间间隔，单位ms（默认2500）
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* @property {Boolean} circular 是否衔接播放，见官网说明（默认true）
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* @property {String} bg-color 背景颜色（默认#f3f4f6）
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* @property {String Number} border-radius 轮播图圆角值，单位rpx（默认8）
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* @property {Object} title-style 自定义标题样式
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* @property {String Number} effect3d-previous-margin mode = true模式的情况下，激活项与前后项之间的距离，单位rpx（默认50）
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* @property {String} img-mode 图片的裁剪模式，详见image组件裁剪模式（默认aspectFill）
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* @event {Function} click 点击轮播图时触发
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* @example <u-swiper :list="list" mode="dot" indicator-pos="bottomRight"></u-swiper>
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*/
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export default {
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name: "u-swiper",
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props: {
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// 轮播图的数据,格式如：[{image: 'xxxx', title: 'xxxx'}，{image: 'yyyy', title: 'yyyy'}]，其中title字段可选
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list: {
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type: Array,
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default () {
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return [];
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}
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},
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// 是否显示title标题
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title: {
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type: Boolean,
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default: false
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},
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// 用户自定义的指示器的样式
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indicator: {
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type: Object,
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default () {
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return {};
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}
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},
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// 圆角值
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borderRadius: {
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type: [Number, String],
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default: 8
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},
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// 隔多久自动切换
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interval: {
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type: [String, Number],
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default: 3000
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},
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// 指示器的模式，rect|dot|number|round
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mode: {
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type: String,
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default: 'round'
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},
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// list的高度，单位rpx
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height: {
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type: [Number, String],
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default: 250
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},
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// 指示器的位置，topLeft|topCenter|topRight|bottomLeft|bottomCenter|bottomRight
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indicatorPos: {
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type: String,
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default: 'bottomCenter'
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},
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// 是否开启缩放效果
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effect3d: {
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type: Boolean,
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default: false
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},
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// 3D模式的情况下，激活item与前后item之间的距离，单位rpx
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effect3dPreviousMargin: {
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type: [Number, String],
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default: 50
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},
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// 是否自动播放
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autoplay: {
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type: Boolean,
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default: true
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},
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// 自动轮播时间间隔，单位ms
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duration: {
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type: [Number, String],
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default: 500
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},
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// 是否衔接滑动，即到最后一张时接着滑动，是否自动切换到第一张
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circular: {
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type: Boolean,
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default: true
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},
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// 图片的裁剪模式
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imgMode: {
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type: String,
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default: 'aspectFill'
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},
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// 从list数组中读取的图片的属性名
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name: {
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type: String,
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default: 'image'
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},
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// 背景颜色
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bgColor: {
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type: String,
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default: '#f3f4f6'
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},
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// 初始化时，默认显示第几项
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current: {
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type: [Number, String],
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default: 0
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},
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// 标题的样式，对象形式
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titleStyle: {
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type: Object,
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default() {
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return {}
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}
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}
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},
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watch: {
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// 如果外部的list发生变化，判断长度是否被修改，如果前后长度不一致，重置uCurrent值，避免溢出
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list(nVal, oVal) {
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if(nVal.length !== oVal.length) this.uCurrent = 0;
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},
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// 监听外部current的变化，实时修改内部依赖于此测uCurrent值，如果更新了current，而不是更新uCurrent，
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// 就会错乱，因为指示器是依赖于uCurrent的
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current(n) {
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this.uCurrent = n;
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}
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},
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data() {
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return {
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uCurrent: this.current // 当前活跃的swiper-item的index
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};
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},
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computed: {
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justifyContent() {
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if (this.indicatorPos == 'topLeft' || this.indicatorPos == 'bottomLeft') return 'flex-start';
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if (this.indicatorPos == 'topCenter' || this.indicatorPos == 'bottomCenter') return 'center';
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if (this.indicatorPos == 'topRight' || this.indicatorPos == 'bottomRight') return 'flex-end';
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},
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titlePaddingBottom() {
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let tmp = 0;
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if (this.mode == 'none') return '12rpx';
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if (['bottomLeft', 'bottomCenter', 'bottomRight'].indexOf(this.indicatorPos) >= 0 && this.mode == 'number') {
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tmp = '60rpx';
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} else if (['bottomLeft', 'bottomCenter', 'bottomRight'].indexOf(this.indicatorPos) >= 0 && this.mode != 'number') {
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tmp = '40rpx';
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} else {
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tmp = '12rpx';
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}
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return tmp;
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},
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// 因为uni的swiper组件的current参数只接受Number类型，这里做一个转换
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elCurrent() {
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return Number(this.current);
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}
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},
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methods: {
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listClick(index) {
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this.$emit('click', index);
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},
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change(e) {
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let current = e.detail.current;
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this.uCurrent = current;
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// 发出change事件，表示当前自动切换的index，从0开始
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this.$emit('change', current);
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},
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// 头条小程序不支持animationfinish事件，改由change事件
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// 暂不监听此事件，因为不再给swiper绑定uCurrent属性
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animationfinish(e) {
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// #ifndef MP-TOUTIAO
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// this.uCurrent = e.detail.current;
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// #endif
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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/style.components.scss";
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.u-swiper-wrap {
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position: relative;
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overflow: hidden;
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transform: translateY(0);
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}
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.u-swiper-image {
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width: 100%;
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will-change: transform;
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height: 100%;
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/* #ifndef APP-NVUE */
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display: block;
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/* #endif */
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/* #ifdef H5 */
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pointer-events: none;
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/* #endif */
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}
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.u-swiper-indicator {
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padding: 0 24rpx;
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position: absolute;
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@include vue-flex;
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width: 100%;
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z-index: 1;
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}
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.u-indicator-item-rect {
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width: 26rpx;
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height: 8rpx;
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margin: 0 6rpx;
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transition: all 0.5s;
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background-color: rgba(0, 0, 0, 0.3);
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}
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.u-indicator-item-rect-active {
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background-color: rgba(255, 255, 255, 0.8);
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}
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.u-indicator-item-dot {
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width: 14rpx;
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height: 14rpx;
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margin: 0 6rpx;
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border-radius: 20rpx;
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transition: all 0.5s;
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background-color: rgba(0, 0, 0, 0.3);
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}
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.u-indicator-item-dot-active {
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background-color: rgba(255, 255, 255, 0.8);
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}
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.u-indicator-item-round {
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width: 14rpx;
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height: 14rpx;
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margin: 0 6rpx;
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border-radius: 20rpx;
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transition: all 0.5s;
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background-color: rgba(0, 0, 0, 0.3);
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}
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.u-indicator-item-round-active {
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width: 34rpx;
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background-color: rgba(255, 255, 255, 0.8);
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}
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.u-indicator-item-number {
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padding: 6rpx 16rpx;
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line-height: 1;
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background-color: rgba(0, 0, 0, 0.3);
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border-radius: 100rpx;
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font-size: 26rpx;
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color: rgba(255, 255, 255, 0.8);
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}
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.u-list-scale {
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transform-origin: center center;
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}
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.u-list-image-wrap {
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width: 100%;
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height: 100%;
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flex: 1;
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transition: all 0.5s;
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overflow: hidden;
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box-sizing: content-box;
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position: relative;
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}
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.u-swiper-title {
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position: absolute;
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background-color: rgba(0, 0, 0, 0.3);
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bottom: 0;
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left: 0;
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width: 100%;
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font-size: 28rpx;
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padding: 12rpx 24rpx;
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color: rgba(255, 255, 255, 0.9);
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}
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.u-swiper-item {
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@include vue-flex;
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overflow: hidden;
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align-items: center;
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}
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</style>
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