u-swiper.vue 8.7 KB

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  1. <template>
  2. <view
  3. class="u-swiper"
  4. :style="{
  5. backgroundColor: bgColor,
  6. height: $u.addUnit(height),
  7. borderRadius: $u.addUnit(radius)
  8. }"
  9. >
  10. <view
  11. class="u-swiper__loading"
  12. v-if="loading"
  13. >
  14. <u-loading-icon mode="circle"></u-loading-icon>
  15. </view>
  16. <swiper
  17. v-else
  18. class="u-swiper__wrapper"
  19. :style="{
  20. height: $u.addUnit(height),
  21. }"
  22. @change="change"
  23. :circular="circular"
  24. :interval="interval"
  25. :duration="duration"
  26. :autoplay="autoplay"
  27. :current="current"
  28. :currentItemId="currentItemId"
  29. :previousMargin="$u.addUnit(previousMargin)"
  30. :nextMargin="$u.addUnit(nextMargin)"
  31. :acceleration="acceleration"
  32. :displayMultipleItems="displayMultipleItems"
  33. :easingFunction="easingFunction"
  34. >
  35. <swiper-item
  36. class="u-swiper__wrapper__item"
  37. v-for="(item, index) in list"
  38. :key="index"
  39. >
  40. <view
  41. class="u-swiper__wrapper__item__wrapper"
  42. :style="[itemStyle(index)]"
  43. >
  44. <!-- 在nvue中,image图片的宽度默认为屏幕宽度,需要通过flex:1撑开,另外必须设置高度才能显示图片 -->
  45. <image
  46. class="u-swiper__wrapper__item__wrapper__image"
  47. v-if="$u.test.image(getSource(item))"
  48. :src="getSource(item)"
  49. :mode="imgMode"
  50. @tap="clickHandler(index)"
  51. :style="{
  52. height: $u.addUnit(height),
  53. borderRadius: $u.addUnit(radius)
  54. }"
  55. ></image>
  56. <video
  57. class="u-swiper__wrapper__item__wrapper__video"
  58. v-if="$u.test.video(getSource(item))"
  59. :id="`video-${index}`"
  60. :enable-progress-gesture="false"
  61. :src="getSource(item)"
  62. :poster="getPoster(item)"
  63. :title="showTitle && $u.test.object(item) && item.title ? item.title : ''"
  64. :style="{
  65. height: $u.addUnit(height)
  66. }"
  67. controls
  68. @tap="clickHandler(index)"
  69. ></video>
  70. <text
  71. v-if="showTitle && $u.test.object(item) && item.title && $u.test.image(getSource(item))"
  72. class="u-swiper__wrapper__item__wrapper__title u-line-1"
  73. >{{ item.title }}
  74. </text>
  75. </view>
  76. </swiper-item>
  77. </swiper>
  78. <view class="u-swiper__indicator" :style="[$u.addStyle(indicatorStyle)]">
  79. <slot name="indicator">
  80. <u-swiper-indicator
  81. v-if="!loading && indicator && !showTitle"
  82. :indicatorActiveColor="indicatorActiveColor"
  83. :indicatorInactiveColor="indicatorInactiveColor"
  84. :length="list.length"
  85. :current="currentIndex"
  86. :indicatorMode="indicatorMode"
  87. ></u-swiper-indicator>
  88. </slot>
  89. </view>
  90. </view>
  91. </template>
  92. <script>
  93. import props from './props.js';
  94. /**
  95. * Swiper 轮播图
  96. * @description 该组件一般用于导航轮播,广告展示等场景,可开箱即用,
  97. * @tutorial https://www.uviewui.com/components/swiper.html
  98. * @property {Array} list 轮播图数据
  99. * @property {Boolean} indicator 是否显示面板指示器(默认 false )
  100. * @property {String} indicatorActiveColor 指示器非激活颜色(默认 '#FFFFFF' )
  101. * @property {String} indicatorInactiveColor 指示器的激活颜色(默认 'rgba(255, 255, 255, 0.35)' )
  102. * @property {String | Object} indicatorStyle 指示器样式,可通过bottom,left,right进行定位
  103. * @property {String} indicatorMode 指示器模式(默认 'line' )
  104. * @property {Boolean} autoplay 是否自动切换(默认 true )
  105. * @property {String | Number} current 当前所在滑块的 index(默认 0 )
  106. * @property {String} currentItemId 当前所在滑块的 item-id ,不能与 current 被同时指定
  107. * @property {String | Number} interval 滑块自动切换时间间隔(ms)(默认 3000 )
  108. * @property {String | Number} duration 滑块切换过程所需时间(ms)(默认 300 )
  109. * @property {Boolean} circular 播放到末尾后是否重新回到开头(默认 false )
  110. * @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 )
  111. * @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 )
  112. * @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 )
  113. * @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 )
  114. * @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' )
  115. * @property {String} keyName list数组中指定对象的目标属性名(默认 'url' )
  116. * @property {String} imgMode 图片的裁剪模式(默认 'aspectFill' )
  117. * @property {String | Number} height 组件高度(默认 130 )
  118. * @property {String} bgColor 背景颜色(默认 '#f3f4f6' )
  119. * @property {String | Number} radius 组件圆角,数值或带单位的字符串(默认 4 )
  120. * @property {Boolean} loading 是否加载中(默认 false )
  121. * @property {Boolean} showTitle 是否显示标题,要求数组对象中有title属性(默认 false )
  122. * @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
  123. * @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
  124. * @example <u-swiper :list="list4" keyName="url" :autoplay="false"></u-swiper>
  125. */
  126. export default {
  127. name: 'u-swiper',
  128. mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
  129. data() {
  130. return {
  131. currentIndex: 0
  132. }
  133. },
  134. watch: {
  135. current(val, preVal) {
  136. if (val === preVal) return;
  137. this.currentIndex = val; // 和上游数据关联上
  138. }
  139. },
  140. computed: {
  141. itemStyle() {
  142. return index => {
  143. const style = {}
  144. // #ifndef APP-NVUE || MP-TOUTIAO
  145. // 左右流出空间的写法不支持nvue和头条
  146. // 只有配置了此二值,才加上对应的圆角,以及缩放
  147. if (this.nextMargin && this.previousMargin) {
  148. style.borderRadius = uni.$u.addUnit(this.radius)
  149. if (index !== this.currentIndex) style.transform = 'scale(0.92)'
  150. }
  151. // #endif
  152. return style
  153. }
  154. }
  155. },
  156. methods: {
  157. // 获取目标路径,可能数组中为字符串,对象的形式,额外可指定对象的目标属性名keyName
  158. getSource(item) {
  159. if (typeof item === 'string') return item
  160. if (typeof item === 'object' && this.keyName) return item[this.keyName]
  161. else uni.$u.error('请按格式传递列表参数')
  162. return ''
  163. },
  164. // 轮播切换事件
  165. change(e) {
  166. // 当前的激活索引
  167. const {
  168. current
  169. } = e.detail
  170. this.pauseVideo(this.currentIndex)
  171. this.currentIndex = current
  172. this.$emit('change', e.detail)
  173. },
  174. // 切换轮播时,暂停视频播放
  175. pauseVideo(index) {
  176. const lastItem = this.getSource(this.list[index])
  177. if (uni.$u.test.video(lastItem)) {
  178. // 当视频隐藏时,暂停播放
  179. const video = uni.createVideoContext(`video-${index}`, this)
  180. video.pause()
  181. }
  182. },
  183. // 当一个轮播item为视频时,获取它的视频海报
  184. getPoster(item) {
  185. return typeof item === 'object' && item.poster ? item.poster : ''
  186. },
  187. // 点击某个item
  188. clickHandler(index) {
  189. this.$emit('click', index)
  190. }
  191. },
  192. }
  193. </script>
  194. <style lang="scss" scoped>
  195. @import "../../libs/css/components.scss";
  196. .u-swiper {
  197. @include flex;
  198. justify-content: center;
  199. align-items: center;
  200. position: relative;
  201. overflow: hidden;
  202. &__wrapper {
  203. flex: 1;
  204. &__item {
  205. flex: 1;
  206. &__wrapper {
  207. @include flex;
  208. position: relative;
  209. overflow: hidden;
  210. transition: transform 0.3s;
  211. flex: 1;
  212. &__image {
  213. flex: 1;
  214. }
  215. &__video {
  216. flex: 1;
  217. }
  218. &__title {
  219. position: absolute;
  220. background-color: rgba(0, 0, 0, 0.3);
  221. bottom: 0;
  222. left: 0;
  223. right: 0;
  224. font-size: 28 rpx;
  225. padding: 12 rpx 24 rpx;
  226. color: #FFFFFF;
  227. flex: 1;
  228. }
  229. }
  230. }
  231. }
  232. &__indicator {
  233. position: absolute;
  234. bottom: 10px;
  235. }
  236. }
  237. </style>