upload.vue 16 KB

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  1. <template>
  2. <view class="u-upload" v-if="!disabled">
  3. <view
  4. v-if="showUploadList"
  5. class="u-list-item u-preview-wrap"
  6. v-for="(item, index) in lists"
  7. :key="index"
  8. :style="{
  9. width: width + 'rpx',
  10. height: width + 'rpx'
  11. }"
  12. >
  13. <view
  14. v-if="deletable"
  15. class="u-delete-icon"
  16. @tap.stop="deleteItem(index)"
  17. :style="{
  18. background: delBgColor
  19. }"
  20. >
  21. <u-icon class="u-icon" :name="delIcon" size="20" :color="delColor"></u-icon>
  22. </view>
  23. <u-line-progress
  24. v-if="showProgress && item.progress > 0 && !item.error"
  25. :show-percent="false"
  26. height="16"
  27. class="u-progress"
  28. :percent="item.progress"
  29. ></u-line-progress>
  30. <view @tap.stop="retry(index)" v-if="item.error" class="u-error-btn">点击重试</view>
  31. <image @tap.stop="doPreviewImage(item.url || item.path, index)" class="u-preview-image" v-if="!item.isImage" :src="item.url || item.path" :mode="imageMode"></image>
  32. </view>
  33. <slot name="file" :file="lists"></slot>
  34. <view style="display: inline-block;" @tap="selectFile" v-if="maxCount > lists.length">
  35. <slot name="addBtn"></slot>
  36. <view
  37. v-if="!customBtn"
  38. class="u-list-item u-add-wrap"
  39. hover-class="u-add-wrap__hover"
  40. hover-stay-time="150"
  41. :style="{
  42. width: width + 'rpx',
  43. height: width + 'rpx'
  44. }"
  45. >
  46. <u-icon name="plus" class="u-add-btn" size="40"></u-icon>
  47. <view class="u-add-tips">{{ uploadText }}</view>
  48. </view>
  49. </view>
  50. </view>
  51. </template>
  52. <script>
  53. /**
  54. * upload 图片上传
  55. * @description 该组件用于上传图片场景
  56. * @tutorial https://www.uviewui.com/components/upload.html
  57. * @property {String} action 服务器上传地址
  58. * @property {String Number} max-count 最大选择图片的数量(默认99)
  59. * @property {Boolean} custom-btn 如果需要自定义选择图片的按钮,设置为true(默认false)
  60. * @property {Boolean} show-progress 是否显示进度条(默认true)
  61. * @property {Boolean} disabled 是否启用(显示/移仓)组件(默认false)
  62. * @property {String} image-mode 预览图片等显示模式,可选值为uni的image的mode属性值(默认aspectFill)
  63. * @property {String} del-icon 右上角删除图标名称,只能为uView内置图标
  64. * @property {String} del-bg-color 右上角关闭按钮的背景颜色
  65. * @property {String} del-color 右上角关闭按钮图标的颜色
  66. * @property {Object} header 上传携带的头信息,对象形式
  67. * @property {Object} form-data 上传额外携带的参数
  68. * @property {String} name 上传文件的字段名,供后端获取使用(默认file)
  69. * @property {Array<String>} size-type original 原图,compressed 压缩图,默认二者都有(默认['original', 'compressed'])
  70. * @property {Array<String>} source-type 选择图片的来源,album-从相册选图,camera-使用相机,默认二者都有(默认['album', 'camera'])
  71. * @property {Boolean} preview-full-image 是否可以通过uni.previewImage预览已选择的图片(默认true)
  72. * @property {Boolean} multiple 是否开启图片多选,部分安卓机型不支持(默认true)
  73. * @property {Boolean} deletable 是否显示删除图片的按钮(默认true)
  74. * @property {String Number} max-size 选择单个文件的最大大小,单位B(byte),默认不限制(默认Number.MAX_VALUE)
  75. * @property {Array<Object>} file-list 默认显示的图片列表,数组元素为对象,必须提供url属性
  76. * @property {Boolean} upload-text 选择图片按钮的提示文字(默认“选择图片”)
  77. * @property {Boolean} auto-upload 选择完图片是否自动上传,见上方说明(默认true)
  78. * @property {Boolean} show-tips 特殊情况下是否自动提示toast,见上方说明(默认true)
  79. * @property {Boolean} show-upload-list 是否显示组件内部的图片预览(默认true)
  80. * @event {Function} on-oversize 图片大小超出最大允许大小
  81. * @event {Function} on-preview 全屏预览图片时触发
  82. * @event {Function} on-remove 移除图片时触发
  83. * @event {Function} on-success 图片上传成功时触发
  84. * @event {Function} on-change 图片上传后,无论成功或者失败都会触发
  85. * @event {Function} on-error 图片上传失败时触发
  86. * @event {Function} on-progress 图片上传过程中的进度变化过程触发
  87. * @event {Function} on-uploaded 所有图片上传完毕触发
  88. * @event {Function} on-choose-complete 每次选择图片后触发,只是让外部可以得知每次选择后,内部的文件列表
  89. * @example <u-upload :action="action" :file-list="fileList" ></u-upload>
  90. */
  91. export default {
  92. name: 'upload',
  93. props: {
  94. //是否显示组件自带的图片预览功能
  95. showUploadList: {
  96. type: Boolean,
  97. default: true
  98. },
  99. // 后端地址
  100. action: {
  101. type: String,
  102. default: ''
  103. },
  104. // 最大上传数量
  105. maxCount: {
  106. type: [String, Number],
  107. default: 52
  108. },
  109. // 是否显示进度条
  110. showProgress: {
  111. type: Boolean,
  112. default: true
  113. },
  114. // 是否启用
  115. disabled: {
  116. type: Boolean,
  117. default: false
  118. },
  119. // 预览上传的图片时的裁剪模式,和image组件mode属性一致
  120. imageMode: {
  121. type: String,
  122. default: 'aspectFill'
  123. },
  124. // 头部信息
  125. header: {
  126. type: Object,
  127. default() {
  128. return {};
  129. }
  130. },
  131. // 额外携带的参数
  132. formData: {
  133. type: Object,
  134. default() {
  135. return {};
  136. }
  137. },
  138. // 上传的文件字段名
  139. name: {
  140. type: String,
  141. default: 'file'
  142. },
  143. // 所选的图片的尺寸, 可选值为original compressed
  144. sizeType: {
  145. type: Array,
  146. default() {
  147. return ['original', 'compressed'];
  148. }
  149. },
  150. sourceType: {
  151. type: Array,
  152. default() {
  153. return ['album', 'camera'];
  154. }
  155. },
  156. // 是否在点击预览图后展示全屏图片预览
  157. previewFullImage: {
  158. type: Boolean,
  159. default: true
  160. },
  161. // 是否开启图片多选,部分安卓机型不支持
  162. multiple: {
  163. type: Boolean,
  164. default: true
  165. },
  166. // 是否展示删除按钮
  167. deletable: {
  168. type: Boolean,
  169. default: true
  170. },
  171. // 文件大小限制,单位为byte
  172. maxSize: {
  173. type: [String, Number],
  174. default: Number.MAX_VALUE
  175. },
  176. // 显示已上传的文件列表
  177. fileList: {
  178. type: Array,
  179. default() {
  180. return [];
  181. }
  182. },
  183. // 上传区域的提示文字
  184. uploadText: {
  185. type: String,
  186. default: '选择图片'
  187. },
  188. // 是否自动上传
  189. autoUpload: {
  190. type: Boolean,
  191. default: true
  192. },
  193. // 是否显示toast消息提示
  194. showTips: {
  195. type: Boolean,
  196. default: true
  197. },
  198. // 是否通过slot自定义传入选择图标的按钮
  199. customBtn: {
  200. type: Boolean,
  201. default: false
  202. },
  203. // 内部预览图片区域和选择图片按钮的区域宽度,高等于宽
  204. width: {
  205. type: [String, Number],
  206. default: 200
  207. },
  208. // 右上角关闭按钮的背景颜色
  209. delBgColor: {
  210. type: String,
  211. default: '#fa3534'
  212. },
  213. // 右上角关闭按钮的叉号图标的颜色
  214. delColor: {
  215. type: String,
  216. default: '#ffffff'
  217. },
  218. // 右上角删除图标名称,只能为uView内置图标
  219. delIcon: {
  220. type: String,
  221. default: 'close'
  222. },
  223. // 如果上传后的返回值为json字符串,是否自动转json
  224. toJson: {
  225. type: Boolean,
  226. default: true
  227. },
  228. // 上传前的钩子,每个文件上传前都会执行
  229. beforeUpload: {
  230. type: Function,
  231. default: null
  232. }
  233. },
  234. mounted() {},
  235. data() {
  236. return {
  237. lists: [],
  238. isInCount: true,
  239. uploading: false
  240. };
  241. },
  242. watch: {
  243. fileList: {
  244. immediate: true,
  245. handler(val) {
  246. val.map(value => {
  247. this.lists.push({ url: value.url, error: false, progress: 100 });
  248. });
  249. }
  250. }
  251. },
  252. methods: {
  253. // 清除列表
  254. clear() {
  255. this.lists = [];
  256. // 如果是清空形式的话,发出"on-list-change"事件
  257. this.$emit('on-list-change', this.lists);
  258. },
  259. // 重新上传队列中上传失败的所有文件
  260. reUpload() {
  261. this.uploadFile();
  262. },
  263. // 选择图片
  264. selectFile() {
  265. if (this.disabled) return;
  266. const { name = '', maxCount, multiple, maxSize, sizeType, lists, camera, compressed, maxDuration, sourceType } = this;
  267. let chooseFile = null;
  268. const newMaxCount = maxCount - lists.length;
  269. // 设置为只选择图片的时候使用 chooseImage 来实现
  270. chooseFile = new Promise((resolve, reject) => {
  271. uni.chooseImage({
  272. count: multiple ? (newMaxCount > 9 ? 9 : newMaxCount) : 1,
  273. sourceType: sourceType,
  274. sizeType,
  275. success: resolve,
  276. fail: reject
  277. });
  278. });
  279. chooseFile
  280. .then(res => {
  281. let file = null;
  282. let listOldLength = this.lists.length;
  283. res.tempFiles.map((val, index) => {
  284. // 如果是非多选,index大于等于1或者超出最大限制数量时,不处理
  285. if (!multiple && index >= 1) return;
  286. if (val.size > maxSize) {
  287. this.$emit('on-oversize', val, this.lists);
  288. this.showToast('超出允许的文件大小');
  289. } else {
  290. if (maxCount <= lists.length) {
  291. this.$emit('on-exceed', val, this.lists);
  292. this.showToast('超出最大允许的文件个数');
  293. return;
  294. }
  295. let fileName = '';
  296. let fileNameLength='';
  297. let fileFormat = '';
  298. //#ifdef H5
  299. fileName = val.name.lastIndexOf(".");
  300. fileNameLength = val.name.length;
  301. fileFormat = val.name.substring(fileName + 1, fileNameLength).toLowerCase();
  302. //#endif
  303. //#ifndef H5
  304. fileName = val.path.lastIndexOf(".");
  305. fileNameLength = val.path.length;
  306. fileFormat = val.path.substring(fileName + 1, fileNameLength).toLowerCase();
  307. //#endif
  308. lists.push({
  309. url: val.path,
  310. fileType: fileFormat,
  311. progress: 0,
  312. error: false
  313. });
  314. // 列表发生改变,发出事件,第二个参数为当前发生变化的项的索引
  315. this.$emit('on-list-change', this.lists);
  316. }
  317. });
  318. // 每次图片选择完,抛出一个事件,并将当前内部选择的图片数组抛出去
  319. this.$emit('on-choose-complete', this.lists);
  320. if (this.autoUpload) this.uploadFile(listOldLength);
  321. })
  322. .catch(error => {
  323. // this.$emit('on-error', error);
  324. });
  325. },
  326. // 提示用户消息
  327. showToast(message, force = false) {
  328. if (this.showTips || force) {
  329. uni.showToast({
  330. title: message,
  331. icon: 'none'
  332. });
  333. }
  334. },
  335. // 该方法供用户通过ref调用,手动上传
  336. upload() {
  337. this.uploadFile();
  338. },
  339. // 对失败的图片重新上传
  340. retry(index) {
  341. this.lists[index].progress = 0;
  342. this.lists[index].error = false;
  343. this.lists[index].response = null;
  344. uni.showLoading({
  345. title: '重新上传'
  346. });
  347. this.uploadFile(index);
  348. },
  349. // 上传图片
  350. async uploadFile(index = 0) {
  351. if (this.disabled) return;
  352. if (this.uploading) return;
  353. // 全部上传完成
  354. if (index >= this.lists.length) {
  355. this.$emit('on-uploaded', this.lists);
  356. return;
  357. }
  358. // 检查上传地址
  359. if (!this.action) {
  360. this.showToast('请配置上传地址', true);
  361. return;
  362. }
  363. // 检查是否是已上传或者正在上传中
  364. if (this.lists[index].progress == 100) {
  365. if (this.autoUpload == false) this.uploadFile(index + 1);
  366. return;
  367. }
  368. // 执行before-upload钩子
  369. if(this.beforeUpload && typeof(this.beforeUpload) === 'function') {
  370. // 执行回调,同时传入索引和文件列表当作参数
  371. let beforeResponse = this.beforeUpload(index, this.lists);
  372. // 判断是否返回了promise
  373. if (!!beforeResponse && typeof beforeResponse.then === 'function') {
  374. await beforeResponse.then(res => {
  375. // promise返回成功,不进行动作,继续上传
  376. }).catch(err => {
  377. // 进入catch回调的话,继续下一张
  378. return this.uploadFile(index + 1);
  379. })
  380. } else if(beforeResponse === false) {
  381. // 如果返回false,继续下一张图片的上传
  382. return this.uploadFile(index + 1);
  383. }
  384. }
  385. this.lists[index].error = false;
  386. this.uploading = true;
  387. // 创建上传对象
  388. const task = uni.uploadFile({
  389. url: this.action,
  390. filePath: this.lists[index].url,
  391. name: this.name,
  392. formData: this.formData,
  393. header: this.header,
  394. success: res => {
  395. // 判断是否json字符串,将其转为json格式
  396. let data = this.toJson && this.checkIsJSON(res.data) ? JSON.parse(res.data) : res.data;
  397. if (![200, 201].includes(res.statusCode)) {
  398. this.uploadError(index, data);
  399. } else {
  400. // 上传成功
  401. this.lists[index].response = data;
  402. this.lists[index].progress = 100;
  403. this.lists[index].error = false;
  404. this.$emit('on-success', data, index, this.lists);
  405. }
  406. },
  407. fail: e => {
  408. this.uploadError(index, e);
  409. },
  410. complete: res => {
  411. uni.hideLoading();
  412. this.uploading = false;
  413. this.uploadFile(index + 1);
  414. this.$emit('on-change', res, index, this.lists);
  415. }
  416. });
  417. task.onProgressUpdate(res => {
  418. if (res.progress > 0) {
  419. this.lists[index].progress = res.progress;
  420. this.$emit('on-progress', res, index, this.lists);
  421. }
  422. });
  423. },
  424. // 上传失败
  425. uploadError(index, err) {
  426. this.lists[index].progress = 0;
  427. this.lists[index].error = true;
  428. this.lists[index].response = null;
  429. this.$emit('on-error', err, index, this.lists);
  430. this.showToast('上传失败,请重试');
  431. },
  432. // 删除一个图片
  433. deleteItem(index) {
  434. uni.showModal({
  435. title: '提示',
  436. content: '您确定要删除此项吗?',
  437. success: res => {
  438. if (res.confirm) {
  439. if (this.lists[index].process < 100 && this.lists[index].process > 0) {
  440. typeof this.lists[index].uploadTask != 'undefined' && this.lists[index].uploadTask.abort();
  441. }
  442. this.lists.splice(index, 1);
  443. this.$forceUpdate();
  444. this.$emit('on-remove', index, this.lists);
  445. this.showToast('移除成功');
  446. // 列表发生改变,发出事件
  447. this.$emit('on-list-change', this.lists);
  448. }
  449. }
  450. });
  451. },
  452. // 用户通过ref手动的形式,移除一张图片
  453. remove(index) {
  454. // 判断索引的合法范围
  455. if (index >= 0 && index < this.lists.length) {
  456. this.lists.splice(index, 1);
  457. this.$emit('on-list-change', this.lists);
  458. }
  459. },
  460. // 预览图片
  461. doPreviewImage(url, index) {
  462. if (!this.previewFullImage) return;
  463. const images = this.lists.map(item => item.url || item.path);
  464. uni.previewImage({
  465. urls: images,
  466. current: url,
  467. success: () => {
  468. this.$emit('on-preview', url, this.lists);
  469. },
  470. fail: () => {
  471. uni.showToast({
  472. title: '预览图片失败',
  473. icon: 'none'
  474. });
  475. }
  476. });
  477. },
  478. // 判断是否json字符串
  479. checkIsJSON(str) {
  480. if (typeof str == 'string') {
  481. try {
  482. var obj = JSON.parse(str);
  483. if (typeof obj == 'object' && obj) {
  484. return true;
  485. } else {
  486. return false;
  487. }
  488. } catch (e) {
  489. return false;
  490. }
  491. }
  492. return false;
  493. }
  494. }
  495. };
  496. </script>
  497. <style lang="scss" scoped>
  498. // nvue不能用标签命名样式
  499. /* #ifndef APP-NVUE */
  500. image {
  501. display: inline-block;
  502. // 解决图片加载时可能会瞬间变形的问题
  503. will-change: transform;
  504. }
  505. view,
  506. text {
  507. box-sizing: border-box;
  508. flex-direction: row;
  509. }
  510. /* #endif */
  511. .u-upload {
  512. display: flex;
  513. flex-wrap: wrap;
  514. align-items: center;
  515. }
  516. .u-list-item {
  517. width: 200rpx;
  518. height: 200rpx;
  519. overflow: hidden;
  520. margin: 10rpx;
  521. background: rgb(244, 245, 246);
  522. position: relative;
  523. border-radius: 10rpx;
  524. display: inline-flex;
  525. align-items: center;
  526. justify-content: center;
  527. }
  528. .u-preview-wrap {
  529. border: 1px solid rgb(235, 236, 238);
  530. }
  531. .u-add-wrap {
  532. flex-direction: column;
  533. color: $u-content-color;
  534. font-size: 28rpx;
  535. }
  536. .u-add-tips {
  537. margin-top: 20rpx;
  538. }
  539. .u-add-wrap__hover {
  540. background-color: rgb(235, 236, 238);
  541. }
  542. .u-preview-image {
  543. display: block;
  544. width: 100%;
  545. height: 100%;
  546. border-radius: 10rpx;
  547. }
  548. .u-delete-icon {
  549. position: absolute;
  550. top: 10rpx;
  551. right: 10rpx;
  552. z-index: 10;
  553. background-color: $u-type-error;
  554. border-radius: 100rpx;
  555. width: 44rpx;
  556. height: 44rpx;
  557. display: flex;
  558. align-items: center;
  559. justify-content: center;
  560. }
  561. .u-icon {
  562. display: flex;
  563. align-items: center;
  564. justify-content: center;
  565. }
  566. .u-progress {
  567. position: absolute;
  568. bottom: 10rpx;
  569. left: 8rpx;
  570. right: 8rpx;
  571. z-index: 9;
  572. width: auto;
  573. }
  574. .u-error-btn {
  575. color: #ffffff;
  576. background-color: $u-type-error;
  577. font-size: 20rpx;
  578. padding: 4px 0;
  579. text-align: center;
  580. position: absolute;
  581. bottom: 0;
  582. left: 0;
  583. right: 0;
  584. z-index: 9;
  585. line-height: 1;
  586. }
  587. </style>