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						<template>	<view class="u-swiper-wrap" :style="{borderRadius: `${borderRadius}rpx`}">		<swiper :current="elCurrent" @change="change" 			@animationfinish="animationfinish" 			:interval="interval" :circular="circular" 			:duration="duration" :autoplay="autoplay"			:previous-margin="effect3d ? effect3dPreviousMargin + 'rpx' : '0'" 			:next-margin="effect3d ? effect3dPreviousMargin + 'rpx' : '0'"			:style="{height: height + 'rpx',backgroundColor: bgColor}">			<swiper-item class="u-swiper-item" v-for="(item, index) in list" :key="index">				<view class="u-list-image-wrap" 					@tap.stop.prevent="listClick(index)" 					:class="[uCurrent != index ? 'u-list-scale' : '']" 					:style="{borderRadius: `${borderRadius}rpx`,						transform: effect3d && uCurrent != index ? 'scaleY(0.9)' : 'scaleY(1)',						margin: effect3d && uCurrent != index ? '0 20rpx' : 0					}">					<!-- 图片 -->					<image class="u-swiper-image" :src="item[name] || item" :mode="imgMode"></image>					<!-- 自己加的内容 -->					<view class="swiper-diy-left" @click.stop.prevent="$emit('clickDiy', {'index': index, 'type': 'btn1'})">						<text>查看会员权益和细则</text>					</view>					<view class="swiper-diy-right" @click.stop.prevent="$emit('clickDiy', {'index': index, 'type': 'btn2'})">						<text class="lf-iconfont icon-erweima lf-font-30"></text>					</view>										<view v-if="title && item.title" class="u-swiper-title u-line-1" 						:style="[{'padding-bottom': titlePaddingBottom}, titleStyle]">						{{ item.title }}					</view>				</view>			</swiper-item>		</swiper>				<view class="u-swiper-indicator" :style="{				top: indicatorPos == 'topLeft' || indicatorPos == 'topCenter' || indicatorPos == 'topRight' ? '12rpx' : 'auto',				bottom: indicatorPos == 'bottomLeft' || indicatorPos == 'bottomCenter' || indicatorPos == 'bottomRight' ? '12rpx' : 'auto',				justifyContent: justifyContent,				padding: `0 ${effect3d ? '74rpx' : '24rpx'}`			}">			<block v-if="mode == 'rect'">				<view class="u-indicator-item-rect" 					:class="{ 'u-indicator-item-rect-active': index == uCurrent }" 					v-for="(item, index) in list" :key="index">				</view>			</block>			<block v-if="mode == 'dot'">				<view class="u-indicator-item-dot" 					:class="{ 'u-indicator-item-dot-active': index == uCurrent }" 					v-for="(item, index) in list" :key="index">				</view>			</block>			<block v-if="mode == 'round'">				<view class="u-indicator-item-round" 					:class="{ 'u-indicator-item-round-active': index == uCurrent }" 					v-for="(item, index) in list" :key="index">				</view>			</block>			<block v-if="mode == 'number'">				<view class="u-indicator-item-number">{{ uCurrent + 1 }}/{{ list.length }}</view>			</block>		</view>	</view></template>
<script>	/**	 * swiper 轮播图	 * @description 该组件一般用于导航轮播,广告展示等场景,可开箱即用	 * @tutorial https://www.uviewui.com/components/swiper.html
	 * @property {Array} list 轮播图数据,见官网"基本使用"说明	 * @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)	 * @property {String} mode 指示器模式,见官网说明(默认round)	 * @property {String Number} height 轮播图组件高度,单位rpx(默认250)	 * @property {String} indicator-pos 指示器的位置(默认bottomCenter)	 * @property {Boolean} effect3d 是否开启3D效果(默认false)	 * @property {Boolean} autoplay 是否自动播放(默认true)	 * @property {String Number} interval 自动轮播时间间隔,单位ms(默认2500)	 * @property {Boolean} circular 是否衔接播放,见官网说明(默认true)	 * @property {String} bg-color 背景颜色(默认#f3f4f6)	 * @property {String Number} border-radius 轮播图圆角值,单位rpx(默认8)	 * @property {Object} title-style 自定义标题样式	 * @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)	 * @property {String} img-mode 图片的裁剪模式,详见image组件裁剪模式(默认aspectFill)	 * @event {Function} click 点击轮播图时触发	 * @example <u-swiper :list="list" mode="dot" indicator-pos="bottomRight"></u-swiper>	 */	export default {		name: "u-swiper",		props: {			// 轮播图的数据,格式如:[{image: 'xxxx', title: 'xxxx'},{image: 'yyyy', title: 'yyyy'}],其中title字段可选
			list: {				type: Array,				default () {					return [];				}			},			// 是否显示title标题
			title: {				type: Boolean,				default: false			},			// 用户自定义的指示器的样式
			indicator: {				type: Object,				default () {					return {};				}			},			// 圆角值
			borderRadius: {				type: [Number, String],				default: 8			},			// 隔多久自动切换
			interval: {				type: [String, Number],				default: 3000			},			// 指示器的模式,rect|dot|number|round
			mode: {				type: String,				default: 'round'			},			// list的高度,单位rpx
			height: {				type: [Number, String],				default: 250			},			// 指示器的位置,topLeft|topCenter|topRight|bottomLeft|bottomCenter|bottomRight
			indicatorPos: {				type: String,				default: 'bottomCenter'			},			// 是否开启缩放效果
			effect3d: {				type: Boolean,				default: false			},			// 3D模式的情况下,激活item与前后item之间的距离,单位rpx
			effect3dPreviousMargin: {				type: [Number, String],				default: 50			},			// 是否自动播放
			autoplay: {				type: Boolean,				default: true			},			// 自动轮播时间间隔,单位ms
			duration: {				type: [Number, String],				default: 500			},			// 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
			circular: {				type: Boolean,				default: true			},			// 图片的裁剪模式 
			imgMode: {				type: String,				default: 'aspectFill'			},			// 从list数组中读取的图片的属性名
			name: {				type: String,				default: 'image'			},			// 背景颜色
			bgColor: {				type: String,				default: '#f3f4f6'			},			// 初始化时,默认显示第几项
			current: {				type: [Number, String],				default: 0			},			// 标题的样式,对象形式
			titleStyle: {				type: Object,				default() {					return {}				}			}		},		watch: {			// 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
			list(nVal, oVal) {				if(nVal.length !== oVal.length) this.uCurrent = 0;			},			// 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,
			// 就会错乱,因为指示器是依赖于uCurrent的
			current(n) {				this.uCurrent = n;			}		},		data() {			return {				uCurrent: this.current // 当前活跃的swiper-item的index
			};		},		computed: {			justifyContent() {				if (this.indicatorPos == 'topLeft' || this.indicatorPos == 'bottomLeft') return 'flex-start';				if (this.indicatorPos == 'topCenter' || this.indicatorPos == 'bottomCenter') return 'center';				if (this.indicatorPos == 'topRight' || this.indicatorPos == 'bottomRight') return 'flex-end';			},			titlePaddingBottom() {				let tmp = 0;				if (this.mode == 'none') return '12rpx';				if (['bottomLeft', 'bottomCenter', 'bottomRight'].indexOf(this.indicatorPos) >= 0 && this.mode == 'number') {					tmp = '60rpx';				} else if (['bottomLeft', 'bottomCenter', 'bottomRight'].indexOf(this.indicatorPos) >= 0 && this.mode != 'number') {					tmp = '40rpx';				} else {					tmp = '12rpx';				}				return tmp;			},			// 因为uni的swiper组件的current参数只接受Number类型,这里做一个转换
			elCurrent() {				return Number(this.current);			}		},		methods: {			listClick(index) {				this.$emit('click', index);			},			change(e) {				let current = e.detail.current;				this.uCurrent = current;				// 发出change事件,表示当前自动切换的index,从0开始
				this.$emit('change', current);			},			// 头条小程序不支持animationfinish事件,改由change事件
			// 暂不监听此事件,因为不再给swiper绑定uCurrent属性
			animationfinish(e) {				// #ifndef MP-TOUTIAO
				// this.uCurrent = e.detail.current;
				// #endif
			}		}	};</script>
<style lang="scss" scoped>	// @import "../../libs/css/style.components.scss";
		.u-swiper-wrap {		position: relative;		overflow: hidden;		transform: translateY(0);	}
	.u-swiper-image {		width: 100%;		will-change: transform;		height: 100%;		/* #ifndef APP-NVUE */		display: block;		/* #endif */		/* #ifdef H5 */		pointer-events: none;		/* #endif */	}
	.u-swiper-indicator {		padding: 0 24rpx;		position: absolute;		// @include vue-flex;
		display: flex;		flex-direction: row;				width: 100%;		z-index: 1;	}
	.u-indicator-item-rect {		width: 26rpx;		height: 8rpx;		margin: 0 6rpx;		transition: all 0.5s;		background-color: rgba(0, 0, 0, 0.3);	}
	.u-indicator-item-rect-active {		background-color: rgba(255, 255, 255, 0.8);	}
	.u-indicator-item-dot {		width: 14rpx;		height: 14rpx;		margin: 0 6rpx;		border-radius: 20rpx;		transition: all 0.5s;		background-color: rgba(0, 0, 0, 0.3);	}
	.u-indicator-item-dot-active {		background-color: rgba(255, 255, 255, 0.8);	}
	.u-indicator-item-round {		width: 14rpx;		height: 14rpx;		margin: 0 6rpx;		border-radius: 20rpx;		transition: all 0.5s;		background-color: rgba(0, 0, 0, 0.3);	}
	.u-indicator-item-round-active {		width: 34rpx;		background-color: rgba(255, 255, 255, 0.8);	}
	.u-indicator-item-number {		padding: 6rpx 16rpx;		line-height: 1;		background-color: rgba(0, 0, 0, 0.3);		border-radius: 100rpx;		font-size: 26rpx;		color: rgba(255, 255, 255, 0.8);	}
	.u-list-scale {		transform-origin: center center;	}
	.u-list-image-wrap {		width: 100%;		height: 100%;		flex: 1;		transition: all 0.5s;		overflow: hidden;		box-sizing: content-box;		position: relative;	}
	.u-swiper-title {		position: absolute;		background-color: rgba(0, 0, 0, 0.3);		bottom: 0;		left: 0;		width: 100%;		font-size: 28rpx;		padding: 12rpx 24rpx;		color: rgba(255, 255, 255, 0.9);	}
	.u-swiper-item {		// @include vue-flex;
		overflow: hidden;		align-items: center;				display: flex;		flex-direction: row;	}		.swiper-diy-left, .swiper-diy-right{		position: absolute;		bottom: 40rpx;		color: #FFFFFF;		display: flex;		justify-content: center;		align-items: center;	}	.swiper-diy-left{		left: 40rpx;		width: 246rpx;		height: 49rpx;		border-radius: 24rpx;		border: 1rpx solid #FFFFFF;		font-size: 24rpx;	}	.swiper-diy-right{		right: 40rpx;		width: 60rpx;		height: 60rpx;		border-radius: 50%;		background-color: rgba(0,0,0,0.5);	}</style>
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