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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,
- }">
- <image class="u-swiper-image" :src="item[name] || item" :mode="imgMode"></image>
- <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;
- 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;
- }
- </style>
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