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			237 lines
		
	
	
		
			7.7 KiB
		
	
	
	
		
			Vue
		
	
	
	
	
	
			
		
		
	
	
			237 lines
		
	
	
		
			7.7 KiB
		
	
	
	
		
			Vue
		
	
	
	
	
	
<template>
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	<view
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		class="u-swiper"
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		:style="{
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			backgroundColor: bgColor,
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			height: $u.addUnit(height),
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			borderRadius: $u.addUnit(radius)
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		}"
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	>
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		<view
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			class="u-swiper__loading"
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			v-if="loading"
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		>
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			<u-loading-icon mode="circle"></u-loading-icon>
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		</view>
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		<swiper
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			v-else
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			class="u-swiper__wrapper"
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			:style="{
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				height: $u.addUnit(height),
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			}"
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			@change="change"
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			:circular="circular"
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			:interval="interval"
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			:duration="duration"
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			:autoplay="autoplay"
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			:current="current"
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			:currentItemId="currentItemId"
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			:previousMargin="$u.addUnit(previousMargin)"
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			:nextMargin="$u.addUnit(nextMargin)"
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			:acceleration="acceleration"
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			:displayMultipleItems="displayMultipleItems"
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			:easingFunction="easingFunction"
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		>
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			<swiper-item
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				class="u-swiper__wrapper__item"
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				v-for="(item, index) in list"
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				:key="index"
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			>
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				<view
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					class="u-swiper__wrapper__item__wrapper"
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					:style="[itemStyle(index)]"
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				>
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					<!-- 在nvue中,image图片的宽度默认为屏幕宽度,需要通过flex:1撑开,另外必须设置高度才能显示图片 -->
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					<image
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						class="u-swiper__wrapper__item__wrapper__image"
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						v-if="$u.test.image(getSource(item))"
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						:src="getSource(item)"
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						:mode="imgMode"
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						@tap="clickHandler(index)"
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						:style="{
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							height: $u.addUnit(height)
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						}"
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					></image>
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					<video
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						class="u-swiper__wrapper__item__wrapper__video"
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						v-if="$u.test.video(getSource(item))"
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						:id="`video-${index}`"
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						:enable-progress-gesture="false"
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						:src="getSource(item)"
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						:poster="getPoster(item)"
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						:title="showTitle && $u.test.object(item) && item.title ? item.title : ''"
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						:style="{
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							height: $u.addUnit(height)
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						}"
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						controls
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					></video>
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					<text
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						v-if="showTitle && $u.test.object(item) && item.title && $u.test.image(getSource(item))"
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						class="u-swiper__wrapper__item__wrapper__title u-line-1"
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					>{{ item.title }}</text>
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				</view>
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			</swiper-item>
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		</swiper>
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		<view class="u-swiper__indicator" :style="[$u.addStyle(indicatorStyle)]">
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			<slot name="indicator">
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				<u-swiper-indicator
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					v-if="!loading && indicator && !showTitle"
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					:indicatorActiveColor="indicatorActiveColor"
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					:indicatorInactiveColor="indicatorInactiveColor"
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					:length="list.length"
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					:current="currentIndex"
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					:indicatorMode="indicatorMode"
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				></u-swiper-indicator>
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			</slot>
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		</view>
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	</view>
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</template>
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<script>
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	import props from './props.js';
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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
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	 * @property {Boolean}			indicator				是否显示面板指示器(默认 false )
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	 * @property {String}			indicatorActiveColor	指示器非激活颜色(默认 '#FFFFFF' )
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	 * @property {String}			indicatorInactiveColor	指示器的激活颜色(默认 'rgba(255, 255, 255, 0.35)' )
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	 * @property {String | Object}	indicatorStyle			指示器样式,可通过bottom,left,right进行定位
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	 * @property {String}			indicatorMode			指示器模式(默认 'line' )
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	 * @property {Boolean}			autoplay				是否自动切换(默认 true )
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	 * @property {String | Number}	current					当前所在滑块的 index(默认 0 )
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	 * @property {String}			currentItemId			当前所在滑块的 item-id ,不能与 current 被同时指定
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	 * @property {String | Number}	interval				滑块自动切换时间间隔(ms)(默认 3000 )
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	 * @property {String | Number}	duration				滑块切换过程所需时间(ms)(默认 300 )
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	 * @property {Boolean}			circular				播放到末尾后是否重新回到开头(默认 false )
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	 * @property {String | Number}	previousMargin			前边距,可用于露出前一项的一小部分,nvue和支付宝不支持(默认 0 )
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	 * @property {String | Number}	nextMargin				后边距,可用于露出后一项的一小部分,nvue和支付宝不支持(默认 0 )
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	 * @property {Boolean}			acceleration			当开启时,会根据滑动速度,连续滑动多屏,支付宝不支持(默认 false )
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	 * @property {Number}			displayMultipleItems	同时显示的滑块数量,nvue、支付宝小程序不支持(默认 1 )
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	 * @property {String}			easingFunction			指定swiper切换缓动动画类型, 只对微信小程序有效(默认 'default' )
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	 * @property {String}			keyName					list数组中指定对象的目标属性名(默认 'url' )
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	 * @property {String}			imgMode					图片的裁剪模式(默认 'aspectFill' )
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	 * @property {String | Number}	height					组件高度(默认 130 )
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	 * @property {String}			bgColor					背景颜色(默认 	'#f3f4f6' )
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	 * @property {String | Number}	radius					组件圆角,数值或带单位的字符串(默认 4 )
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	 * @property {Boolean}			loading					是否加载中(默认 false )
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	 * @property {Boolean}			showTitle				是否显示标题,要求数组对象中有title属性(默认 false )
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	 * @event {Function(index)}	click	点击轮播图时触发	index:点击了第几张图片,从0开始
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	 * @event {Function(index)}	change	轮播图切换时触发(自动或者手动切换)	index:切换到了第几张图片,从0开始
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	 * @example	<u-swiper :list="list4" keyName="url" :autoplay="false"></u-swiper>
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	 */
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	export default {
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		name: 'u-swiper',
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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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				currentIndex: 0
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			}
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		},
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		computed: {
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			itemStyle() {
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				return index => {
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					const style = {}
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					// #ifndef APP-NVUE || MP-TOUTIAO
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					// 左右流出空间的写法不支持nvue和头条
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					// 只有配置了此二值,才加上对应的圆角,以及缩放
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					if (this.nextMargin && this.previousMargin) {
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						style.borderRadius = uni.$u.addUnit(this.radius)
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						if (index !== this.currentIndex) style.transform = 'scale(0.92)'
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					}
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					// #endif
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					return style
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				}
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			}
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		},
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		methods: {
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			// 获取目标路径,可能数组中为字符串,对象的形式,额外可指定对象的目标属性名keyName
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			getSource(item) {
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				if (typeof item === 'string') return item
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				if (typeof item === 'object' && this.keyName) return item[this.keyName]
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				else uni.$u.error('请按格式传递列表参数')
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				return ''
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			},
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			// 轮播切换事件
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			change(e) {
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				// 当前的激活索引
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				const {
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					current
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				} = e.detail
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				this.pauseVideo(this.currentIndex)
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				this.currentIndex = current
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				this.$emit('change', e.detail)
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			},
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			// 切换轮播时,暂停视频播放
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			pauseVideo(index) {
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				const lastItem = this.getSource(this.list[index])
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				if (uni.$u.test.video(lastItem)) {
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					// 当视频隐藏时,暂停播放
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					const video = uni.createVideoContext(`video-${index}`, this)
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					video.pause()
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				}
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			},
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			// 当一个轮播item为视频时,获取它的视频海报
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			getPoster(item) {
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				return typeof item === 'object' && item.poster ? item.poster : ''
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			},
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			// 点击某个item
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			clickHandler(index) {
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				this.$emit('click', index)
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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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	.u-swiper {
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		@include flex;
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		justify-content: center;
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		align-items: center;
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		position: relative;
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		overflow: hidden;
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		&__wrapper {
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			flex: 1;
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			&__item {
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				&__wrapper {
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					@include flex;
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					position: relative;
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					overflow: hidden;
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					transition: transform 0.3s;
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					&__image {
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						flex: 1;
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					}
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					&__video {
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						flex: 1;
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					}
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					&__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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						right: 0;
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						font-size: 28rpx;
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						padding: 12rpx 24rpx;
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						color: #FFFFFF;
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						flex: 1;
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					}
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				}
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			}
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		}
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		&__indicator {
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			position: absolute;
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			bottom: 10px;
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		}
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	}
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</style>
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