commit | author | age
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<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="getItemType(item) === 'image'" |
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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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borderRadius: $u.addUnit(radius) |
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}" |
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></image> |
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<video |
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class="u-swiper__wrapper__item__wrapper__video" |
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v-if="getItemType(item) === 'video'" |
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:id="`video-${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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@tap="clickHandler(index)" |
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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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watch: { |
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current(val, preVal) { |
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if(val === preVal) return; |
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this.currentIndex = val; // 和上游数据关联上 |
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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.$u.addUnit(this.radius) |
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if (index !== this.currentIndex) style.transform = 'scale(0.92)' |
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} |
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// #endif |
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return style |
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} |
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} |
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}, |
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methods: { |
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getItemType(item) { |
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if (typeof item === 'string') return uni.$u.test.video(this.getSource(item)) ? 'video' : 'image' |
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if (typeof item === 'object' && this.keyName) { |
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if (!item.type) return uni.$u.test.video(this.getSource(item)) ? 'video' : 'image' |
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if (item.type === 'image') return 'image' |
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if (item.type === 'video') return 'video' |
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return 'image' |
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} |
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}, |
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// 获取目标路径,可能数组中为字符串,对象的形式,额外可指定对象的目标属性名keyName |
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getSource(item) { |
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if (typeof item === 'string') return item |
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if (typeof item === 'object' && this.keyName) return item[this.keyName] |
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else uni.$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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flex: 1; |
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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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flex: 1; |
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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> |