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u-swiper.vue 9.8 KB

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  1. <template>
  2. <view class="u-swiper-wrap" :style="{
  3. borderRadius: `${borderRadius}rpx`
  4. }">
  5. <swiper :current="elCurrent" @change="change" @animationfinish="animationfinish" :interval="interval" :circular="circular" :duration="duration" :autoplay="autoplay"
  6. :previous-margin="effect3d ? effect3dPreviousMargin + 'rpx' : '0'" :next-margin="effect3d ? effect3dPreviousMargin + 'rpx' : '0'"
  7. :style="{
  8. height: height + 'rpx',
  9. backgroundColor: bgColor
  10. }">
  11. <swiper-item class="u-swiper-item" v-for="(item, index) in list" :key="index">
  12. <view class="u-list-image-wrap" @tap.stop.prevent="listClick(index)" :class="[uCurrent != index ? 'u-list-scale' : '']" :style="{
  13. borderRadius: `${borderRadius}rpx`,
  14. transform: effect3d && uCurrent != index ? 'scaleY(0.9)' : 'scaleY(1)',
  15. margin: effect3d && uCurrent != index ? '0 20rpx' : 0,
  16. }">
  17. <image class="u-swiper-image" :src="item[name] || item" :mode="imgMode"></image>
  18. <view v-if="title && item.title" class="u-swiper-title u-line-1" :style="[{
  19. 'padding-bottom': titlePaddingBottom
  20. }, titleStyle]">
  21. {{ item.title }}
  22. </view>
  23. </view>
  24. </swiper-item>
  25. </swiper>
  26. <view class="u-swiper-indicator" :style="{
  27. top: indicatorPos == 'topLeft' || indicatorPos == 'topCenter' || indicatorPos == 'topRight' ? '12rpx' : 'auto',
  28. bottom: indicatorPos == 'bottomLeft' || indicatorPos == 'bottomCenter' || indicatorPos == 'bottomRight' ? '12rpx' : 'auto',
  29. justifyContent: justifyContent,
  30. padding: `0 ${effect3d ? '74rpx' : '24rpx'}`
  31. }">
  32. <block v-if="mode == 'rect'">
  33. <view class="u-indicator-item-rect" :class="{ 'u-indicator-item-rect-active': index == uCurrent }" v-for="(item, index) in list"
  34. :key="index"></view>
  35. </block>
  36. <block v-if="mode == 'dot'">
  37. <view class="u-indicator-item-dot" :class="{ 'u-indicator-item-dot-active': index == uCurrent }" v-for="(item, index) in list"
  38. :key="index"></view>
  39. </block>
  40. <block v-if="mode == 'round'">
  41. <view class="u-indicator-item-round" :class="{ 'u-indicator-item-round-active': index == uCurrent }" v-for="(item, index) in list"
  42. :key="index"></view>
  43. </block>
  44. <block v-if="mode == 'number'">
  45. <view class="u-indicator-item-number">{{ uCurrent + 1 }}/{{ list.length }}</view>
  46. </block>
  47. </view>
  48. </view>
  49. </template>
  50. <script>
  51. /**
  52. * swiper 轮播图
  53. * @description 该组件一般用于导航轮播,广告展示等场景,可开箱即用
  54. * @tutorial https://www.uviewui.com/components/swiper.html
  55. * @property {Array} list 轮播图数据,见官网"基本使用"说明
  56. * @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)
  57. * @property {String} mode 指示器模式,见官网说明(默认round)
  58. * @property {String Number} height 轮播图组件高度,单位rpx(默认250)
  59. * @property {String} indicator-pos 指示器的位置(默认bottomCenter)
  60. * @property {Boolean} effect3d 是否开启3D效果(默认false)
  61. * @property {Boolean} autoplay 是否自动播放(默认true)
  62. * @property {String Number} interval 自动轮播时间间隔,单位ms(默认2500)
  63. * @property {Boolean} circular 是否衔接播放,见官网说明(默认true)
  64. * @property {String} bg-color 背景颜色(默认#f3f4f6)
  65. * @property {String Number} border-radius 轮播图圆角值,单位rpx(默认8)
  66. * @property {Object} title-style 自定义标题样式
  67. * @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)
  68. * @property {String} img-mode 图片的裁剪模式,详见image组件裁剪模式(默认aspectFill)
  69. * @event {Function} click 点击轮播图时触发
  70. * @example <u-swiper :list="list" mode="dot" indicator-pos="bottomRight"></u-swiper>
  71. */
  72. export default {
  73. name: "u-swiper",
  74. emits: ["click", "change"],
  75. props: {
  76. // 轮播图的数据,格式如:[{image: 'xxxx', title: 'xxxx'},{image: 'yyyy', title: 'yyyy'}],其中title字段可选
  77. list: {
  78. type: Array,
  79. default () {
  80. return [];
  81. }
  82. },
  83. // 是否显示title标题
  84. title: {
  85. type: Boolean,
  86. default: false
  87. },
  88. // 用户自定义的指示器的样式
  89. indicator: {
  90. type: Object,
  91. default () {
  92. return {};
  93. }
  94. },
  95. // 圆角值
  96. borderRadius: {
  97. type: [Number, String],
  98. default: 8
  99. },
  100. // 隔多久自动切换
  101. interval: {
  102. type: [String, Number],
  103. default: 3000
  104. },
  105. // 指示器的模式,rect|dot|number|round
  106. mode: {
  107. type: String,
  108. default: 'round'
  109. },
  110. // list的高度,单位rpx
  111. height: {
  112. type: [Number, String],
  113. default: 250
  114. },
  115. // 指示器的位置,topLeft|topCenter|topRight|bottomLeft|bottomCenter|bottomRight
  116. indicatorPos: {
  117. type: String,
  118. default: 'bottomCenter'
  119. },
  120. // 是否开启缩放效果
  121. effect3d: {
  122. type: Boolean,
  123. default: false
  124. },
  125. // 3D模式的情况下,激活item与前后item之间的距离,单位rpx
  126. effect3dPreviousMargin: {
  127. type: [Number, String],
  128. default: 50
  129. },
  130. // 是否自动播放
  131. autoplay: {
  132. type: Boolean,
  133. default: true
  134. },
  135. // 自动轮播时间间隔,单位ms
  136. duration: {
  137. type: [Number, String],
  138. default: 500
  139. },
  140. // 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
  141. circular: {
  142. type: Boolean,
  143. default: true
  144. },
  145. // 图片的裁剪模式
  146. imgMode: {
  147. type: String,
  148. default: 'aspectFill'
  149. },
  150. // 从list数组中读取的图片的属性名
  151. name: {
  152. type: String,
  153. default: 'image'
  154. },
  155. // 背景颜色
  156. bgColor: {
  157. type: String,
  158. default: '#f3f4f6'
  159. },
  160. // 初始化时,默认显示第几项
  161. current: {
  162. type: [Number, String],
  163. default: 0
  164. },
  165. // 标题的样式,对象形式
  166. titleStyle: {
  167. type: Object,
  168. default() {
  169. return {}
  170. }
  171. }
  172. },
  173. watch: {
  174. // 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
  175. list(nVal, oVal) {
  176. if(nVal.length !== oVal.length) this.uCurrent = 0;
  177. },
  178. // 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,
  179. // 就会错乱,因为指示器是依赖于uCurrent的
  180. current(n) {
  181. this.uCurrent = n;
  182. }
  183. },
  184. data() {
  185. return {
  186. uCurrent: this.current // 当前活跃的swiper-item的index
  187. };
  188. },
  189. computed: {
  190. justifyContent() {
  191. if (this.indicatorPos == 'topLeft' || this.indicatorPos == 'bottomLeft') return 'flex-start';
  192. if (this.indicatorPos == 'topCenter' || this.indicatorPos == 'bottomCenter') return 'center';
  193. if (this.indicatorPos == 'topRight' || this.indicatorPos == 'bottomRight') return 'flex-end';
  194. },
  195. titlePaddingBottom() {
  196. let tmp = 0;
  197. if (this.mode == 'none') return '12rpx';
  198. if (['bottomLeft', 'bottomCenter', 'bottomRight'].indexOf(this.indicatorPos) >= 0 && this.mode == 'number') {
  199. tmp = '60rpx';
  200. } else if (['bottomLeft', 'bottomCenter', 'bottomRight'].indexOf(this.indicatorPos) >= 0 && this.mode != 'number') {
  201. tmp = '40rpx';
  202. } else {
  203. tmp = '12rpx';
  204. }
  205. return tmp;
  206. },
  207. // 因为uni的swiper组件的current参数只接受Number类型,这里做一个转换
  208. elCurrent() {
  209. return Number(this.current);
  210. }
  211. },
  212. methods: {
  213. listClick(index) {
  214. this.$emit('click', index);
  215. },
  216. change(e) {
  217. let current = e.detail.current;
  218. this.uCurrent = current;
  219. // 发出change事件,表示当前自动切换的index,从0开始
  220. this.$emit('change', current);
  221. },
  222. // 头条小程序不支持animationfinish事件,改由change事件
  223. // 暂不监听此事件,因为不再给swiper绑定uCurrent属性
  224. animationfinish(e) {
  225. // #ifndef MP-TOUTIAO
  226. // this.uCurrent = e.detail.current;
  227. // #endif
  228. }
  229. }
  230. };
  231. </script>
  232. <style lang="scss" scoped>
  233. @import "../../libs/css/style.components.scss";
  234. .u-swiper-wrap {
  235. position: relative;
  236. overflow: hidden;
  237. transform: translateY(0);
  238. }
  239. .u-swiper-image {
  240. width: 100%;
  241. will-change: transform;
  242. height: 100%;
  243. /* #ifndef APP-NVUE */
  244. display: block;
  245. /* #endif */
  246. /* #ifdef H5 */
  247. pointer-events: none;
  248. /* #endif */
  249. }
  250. .u-swiper-indicator {
  251. padding: 0 24rpx;
  252. position: absolute;
  253. @include vue-flex;
  254. width: 100%;
  255. z-index: 1;
  256. }
  257. .u-indicator-item-rect {
  258. width: 26rpx;
  259. height: 8rpx;
  260. margin: 0 6rpx;
  261. transition: all 0.5s;
  262. background-color: rgba(0, 0, 0, 0.3);
  263. }
  264. .u-indicator-item-rect-active {
  265. background-color: rgba(255, 255, 255, 0.8);
  266. }
  267. .u-indicator-item-dot {
  268. width: 14rpx;
  269. height: 14rpx;
  270. margin: 0 6rpx;
  271. border-radius: 20rpx;
  272. transition: all 0.5s;
  273. background-color: rgba(0, 0, 0, 0.3);
  274. }
  275. .u-indicator-item-dot-active {
  276. background-color: rgba(255, 255, 255, 0.8);
  277. }
  278. .u-indicator-item-round {
  279. width: 14rpx;
  280. height: 14rpx;
  281. margin: 0 6rpx;
  282. border-radius: 20rpx;
  283. transition: all 0.5s;
  284. background-color: rgba(0, 0, 0, 0.3);
  285. }
  286. .u-indicator-item-round-active {
  287. width: 34rpx;
  288. background-color: rgba(255, 255, 255, 0.8);
  289. }
  290. .u-indicator-item-number {
  291. padding: 6rpx 16rpx;
  292. line-height: 1;
  293. background-color: rgba(0, 0, 0, 0.3);
  294. border-radius: 100rpx;
  295. font-size: 26rpx;
  296. color: rgba(255, 255, 255, 0.8);
  297. }
  298. .u-list-scale {
  299. transform-origin: center center;
  300. }
  301. .u-list-image-wrap {
  302. width: 100%;
  303. height: 100%;
  304. flex: 1;
  305. transition: all 0.5s;
  306. overflow: hidden;
  307. box-sizing: content-box;
  308. position: relative;
  309. }
  310. .u-swiper-title {
  311. position: absolute;
  312. background-color: rgba(0, 0, 0, 0.3);
  313. bottom: 0;
  314. left: 0;
  315. width: 100%;
  316. font-size: 28rpx;
  317. padding: 12rpx 24rpx;
  318. color: rgba(255, 255, 255, 0.9);
  319. }
  320. .u-swiper-item {
  321. @include vue-flex;
  322. overflow: hidden;
  323. align-items: center;
  324. }
  325. </style>