| <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> |