purchase-let/uni_modules/uview-plus/components/u-swiper/u-swiper.vue

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<template>
<view
class="u-swiper"
:style="{
backgroundColor: bgColor,
height: addUnit(height),
borderRadius: addUnit(radius)
}"
>
<view
class="u-swiper__loading"
v-if="loading"
>
<u-loading-icon mode="circle"></u-loading-icon>
</view>
<swiper
v-else
class="u-swiper__wrapper"
:style="{
flex: '1',
height: addUnit(height)
}"
@change="change"
:circular="circular"
:interval="interval"
:duration="duration"
:autoplay="autoplay"
:current="current"
:currentItemId="currentItemId"
:previousMargin="addUnit(previousMargin)"
:nextMargin="addUnit(nextMargin)"
:acceleration="acceleration"
:displayMultipleItems="displayMultipleItems"
:easingFunction="easingFunction"
>
<swiper-item
class="u-swiper__wrapper__item"
v-for="(item, index) in list"
:key="index"
>
<view
class="u-swiper__wrapper__item__wrapper"
:style="[itemStyle(index)]"
>
<!-- 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 -->
<image
class="u-swiper__wrapper__item__wrapper__image"
v-if="getItemType(item) === 'image'"
:src="getSource(item)"
:mode="imgMode"
@tap="clickHandler(index)"
:style="{
height: addUnit(height),
borderRadius: addUnit(radius)
}"
></image>
<video
class="u-swiper__wrapper__item__wrapper__video"
v-if="getItemType(item) === 'video'"
:id="`video-${index}`"
:enable-progress-gesture="false"
:src="getSource(item)"
:poster="getPoster(item)"
:title="showTitle && testObject(item) && item.title ? item.title : ''"
:style="{
height: addUnit(height)
}"
controls
@tap="clickHandler(index)"
></video>
<text
v-if="showTitle && testObject(item) && item.title && testImage(getSource(item))"
class="u-swiper__wrapper__item__wrapper__title u-line-1"
>{{ item.title }}</text>
</view>
</swiper-item>
</swiper>
<view class="u-swiper__indicator" :style="[addStyle(indicatorStyle)]">
<slot name="indicator">
<u-swiper-indicator
v-if="!loading && indicator && !showTitle"
:indicatorActiveColor="indicatorActiveColor"
:indicatorInactiveColor="indicatorInactiveColor"
:length="list.length"
:current="currentIndex"
:indicatorMode="indicatorMode"
></u-swiper-indicator>
</slot>
</view>
</view>
</template>
<script>
import props from './props.js';
import mpMixin from '../../libs/mixin/mpMixin';
import mixin from '../../libs/mixin/mixin';
import { addUnit, addStyle, error } from '../../libs/function/index';
import test from '../../libs/function/test';
/**
* 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://ijry.github.io/uview-plus/components/swiper.html
* @property {Array} list 轮播图数据
* @property {Boolean} indicator 是否显示面板指示器(默认 false
* @property {String} indicatorActiveColor 指示器非激活颜色(默认 '#FFFFFF'
* @property {String} indicatorInactiveColor 指示器的激活颜色(默认 'rgba(255, 255, 255, 0.35)'
* @property {String | Object} indicatorStyle 指示器样式可通过bottomleftright进行定位
* @property {String} indicatorMode 指示器模式(默认 'line'
* @property {Boolean} autoplay 是否自动切换(默认 true
* @property {String | Number} current 当前所在滑块的 index默认 0
* @property {String} currentItemId 当前所在滑块的 item-id ,不能与 current 被同时指定
* @property {String | Number} interval 滑块自动切换时间间隔ms默认 3000
* @property {String | Number} duration 滑块切换过程所需时间ms默认 300
* @property {Boolean} circular 播放到末尾后是否重新回到开头(默认 false
* @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
* @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
* @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
* @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
* @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'
* @property {String} keyName list数组中指定对象的目标属性名默认 'url'
* @property {String} imgMode 图片的裁剪模式(默认 'aspectFill'
* @property {String | Number} height 组件高度(默认 130
* @property {String} bgColor 背景颜色(默认 '#f3f4f6'
* @property {String | Number} radius 组件圆角,数值或带单位的字符串(默认 4
* @property {Boolean} loading 是否加载中(默认 false
* @property {Boolean} showTitle 是否显示标题要求数组对象中有title属性默认 false
* @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
* @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
* @example <u-swiper :list="list4" keyName="url" :autoplay="false"></u-swiper>
*/
export default {
name: 'u-swiper',
mixins: [mpMixin, mixin, props],
data() {
return {
currentIndex: 0
}
},
watch: {
current(val, preVal) {
if(val === preVal) return;
this.currentIndex = val; // 和上游数据关联上
}
},
emits: ["click", "change"],
computed: {
itemStyle() {
return index => {
const style = {}
// #ifndef APP-NVUE || MP-TOUTIAO
// 左右流出空间的写法不支持nvue和头条
// 只有配置了此二值,才加上对应的圆角,以及缩放
if (this.nextMargin && this.previousMargin) {
style.borderRadius = addUnit(this.radius)
if (index !== this.currentIndex) style.transform = 'scale(0.92)'
}
// #endif
return style
}
}
},
methods: {
addStyle,
addUnit,
testObject: test.object,
testImage: test.image,
getItemType(item) {
if (typeof item === 'string') return test.video(this.getSource(item)) ? 'video' : 'image'
if (typeof item === 'object' && this.keyName) {
if (!item.type) return test.video(this.getSource(item)) ? 'video' : 'image'
if (item.type === 'image') return 'image'
if (item.type === 'video') return 'video'
return 'image'
}
},
// 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
getSource(item) {
if (typeof item === 'string') return item
if (typeof item === 'object' && this.keyName) return item[this.keyName]
else error('请按格式传递列表参数')
return ''
},
// 轮播切换事件
change(e) {
// 当前的激活索引
const {
current
} = e.detail
this.pauseVideo(this.currentIndex)
this.currentIndex = current
this.$emit('change', e.detail)
},
// 切换轮播时,暂停视频播放
pauseVideo(index) {
const lastItem = this.getSource(this.list[index])
if (test.video(lastItem)) {
// 当视频隐藏时,暂停播放
const video = uni.createVideoContext(`video-${index}`, this)
video.pause()
}
},
// 当一个轮播item为视频时获取它的视频海报
getPoster(item) {
return typeof item === 'object' && item.poster ? item.poster : ''
},
// 点击某个item
clickHandler(index) {
this.$emit('click', index)
}
},
}
</script>
<style lang="scss" scoped>
@import "../../libs/css/components.scss";
.u-swiper__wrapper {
flex: 1;
}
.u-swiper {
@include flex;
justify-content: center;
align-items: center;
position: relative;
overflow: hidden;
&__wrapper {
flex: 1;
&__item {
flex: 1;
&__wrapper {
@include flex;
position: relative;
overflow: hidden;
transition: transform 0.3s;
flex: 1;
&__image {
flex: 1;
}
&__video {
flex: 1;
}
&__title {
position: absolute;
background-color: rgba(0, 0, 0, 0.3);
bottom: 0;
left: 0;
right: 0;
font-size: 28rpx;
padding: 12rpx 24rpx;
color: #FFFFFF;
flex: 1;
}
}
}
}
&__indicator {
position: absolute;
bottom: 10px;
}
}
</style>