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- <template>
- <view class="u-upload" v-if="!disabled">
- <view
- v-if="showUploadList"
- class="u-list-item u-preview-wrap"
- v-for="(item, index) in lists"
- :key="index"
- :style="{
- width: $u.addUnit(width),
- height: $u.addUnit(height)
- }"
- >
- <view
- v-if="deletable"
- class="u-delete-icon"
- @tap.stop="deleteItem(index)"
- :style="{
- background: delBgColor
- }"
- >
- <u-icon class="u-icon" :name="delIcon" size="20" :color="delColor"></u-icon>
- </view>
- <u-line-progress
- v-if="showProgress && item.progress > 0 && item.progress != 100 && !item.error"
- :show-percent="false"
- height="16"
- class="u-progress"
- :percent="item.progress"
- ></u-line-progress>
- <view @tap.stop="retry(index)" v-if="item.error" class="u-error-btn">点击重试</view>
- <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>
- </view>
- <slot name="file" :file="lists"></slot>
- <view style="display: inline-block;" @tap="selectFile" v-if="maxCount > lists.length">
- <slot name="addBtn"></slot>
- <view
- v-if="!customBtn"
- class="u-list-item u-add-wrap"
- hover-class="u-add-wrap__hover"
- hover-stay-time="150"
- :style="{
- width: $u.addUnit(width),
- height: $u.addUnit(height)
- }"
- >
- <u-icon name="plus" class="u-add-btn" size="40"></u-icon>
- <view class="u-add-tips">{{ uploadText }}</view>
- </view>
- </view>
- </view>
- </template>
- <script>
- /**
- * upload 图片上传
- * @description 该组件用于上传图片场景
- * @tutorial https://www.uviewui.com/components/upload.html
- * @property {String} action 服务器上传地址
- * @property {String Number} max-count 最大选择图片的数量(默认99)
- * @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)
- * @property {Boolean} show-progress 是否显示进度条(默认true)
- * @property {Boolean} disabled 是否启用(显示/移仓)组件(默认false)
- * @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)
- * @property {String} del-icon 右上角删除图标名称,只能为uView内置图标
- * @property {String} del-bg-color 右上角关闭按钮的背景颜色
- * @property {String | Number} index 在各个回调事件中的最后一个参数返回,用于区别是哪一个组件的事件
- * @property {String} del-color 右上角关闭按钮图标的颜色
- * @property {Object} header 上传携带的头信息,对象形式
- * @property {Object} form-data 上传额外携带的参数
- * @property {String} name 上传文件的字段名,供后端获取使用(默认file)
- * @property {Array<String>} size-type original 原图,compressed 压缩图,默认二者都有(默认['original', 'compressed'])
- * @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'])
- * @property {Boolean} preview-full-image 是否可以通过uni.previewImage预览已选择的图片(默认true)
- * @property {Boolean} multiple 是否开启图片多选,部分安卓机型不支持(默认true)
- * @property {Boolean} deletable 是否显示删除图片的按钮(默认true)
- * @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)
- * @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
- * @property {Boolean} upload-text 选择图片按钮的提示文字(默认“选择图片”)
- * @property {Boolean} auto-upload 选择完图片是否自动上传,见上方说明(默认true)
- * @property {Boolean} show-tips 特殊情况下是否自动提示toast,见上方说明(默认true)
- * @property {Boolean} show-upload-list 是否显示组件内部的图片预览(默认true)
- * @event {Function} on-oversize 图片大小超出最大允许大小
- * @event {Function} on-preview 全屏预览图片时触发
- * @event {Function} on-remove 移除图片时触发
- * @event {Function} on-success 图片上传成功时触发
- * @event {Function} on-change 图片上传后,无论成功或者失败都会触发
- * @event {Function} on-error 图片上传失败时触发
- * @event {Function} on-progress 图片上传过程中的进度变化过程触发
- * @event {Function} on-uploaded 所有图片上传完毕触发
- * @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
- * @example <u-upload :action="action" :file-list="fileList" ></u-upload>
- */
- export default {
- name: 'u-upload',
- props: {
- //是否显示组件自带的图片预览功能
- showUploadList: {
- type: Boolean,
- default: true
- },
- // 后端地址
- action: {
- type: String,
- default: ''
- },
- // 最大上传数量
- maxCount: {
- type: [String, Number],
- default: 52
- },
- // 是否显示进度条
- showProgress: {
- type: Boolean,
- default: true
- },
- // 是否启用
- disabled: {
- type: Boolean,
- default: false
- },
- // 预览上传的图片时的裁剪模式,和image组件mode属性一致
- imageMode: {
- type: String,
- default: 'aspectFill'
- },
- // 头部信息
- header: {
- type: Object,
- default() {
- return {};
- }
- },
- // 额外携带的参数
- formData: {
- type: Object,
- default() {
- return {};
- }
- },
- // 上传的文件字段名
- name: {
- type: String,
- default: 'file'
- },
- // 所选的图片的尺寸, 可选值为original compressed
- sizeType: {
- type: Array,
- default() {
- return ['original', 'compressed'];
- }
- },
- sourceType: {
- type: Array,
- default() {
- return ['album', 'camera'];
- }
- },
- // 是否在点击预览图后展示全屏图片预览
- previewFullImage: {
- type: Boolean,
- default: true
- },
- // 是否开启图片多选,部分安卓机型不支持
- multiple: {
- type: Boolean,
- default: true
- },
- // 是否展示删除按钮
- deletable: {
- type: Boolean,
- default: true
- },
- // 文件大小限制,单位为byte
- maxSize: {
- type: [String, Number],
- default: Number.MAX_VALUE
- },
- // 显示已上传的文件列表
- fileList: {
- type: Array,
- default() {
- return [];
- }
- },
- // 上传区域的提示文字
- uploadText: {
- type: String,
- default: '选择图片'
- },
- // 是否自动上传
- autoUpload: {
- type: Boolean,
- default: true
- },
- // 是否显示toast消息提示
- showTips: {
- type: Boolean,
- default: true
- },
- // 是否通过slot自定义传入选择图标的按钮
- customBtn: {
- type: Boolean,
- default: false
- },
- // 内部预览图片区域和选择图片按钮的区域宽度
- width: {
- type: [String, Number],
- default: 200
- },
- // 内部预览图片区域和选择图片按钮的区域高度
- height: {
- type: [String, Number],
- default: 200
- },
- // 右上角关闭按钮的背景颜色
- delBgColor: {
- type: String,
- default: '#fa3534'
- },
- // 右上角关闭按钮的叉号图标的颜色
- delColor: {
- type: String,
- default: '#ffffff'
- },
- // 右上角删除图标名称,只能为uView内置图标
- delIcon: {
- type: String,
- default: 'close'
- },
- // 如果上传后的返回值为json字符串,是否自动转json
- toJson: {
- type: Boolean,
- default: true
- },
- // 上传前的钩子,每个文件上传前都会执行
- beforeUpload: {
- type: Function,
- default: null
- },
- // 移除文件前的钩子
- beforeRemove: {
- type: Function,
- default: null
- },
- // 允许上传的图片后缀
- limitType:{
- type: Array,
- default() {
- // 支付宝小程序真机选择图片的后缀为"image"
- // https://opendocs.alipay.com/mini/api/media-image
- return ['png', 'jpg', 'jpeg', 'webp', 'gif', 'image'];
- }
- },
- // 在各个回调事件中的最后一个参数返回,用于区别是哪一个组件的事件
- index: {
- type: [Number, String],
- default: ''
- }
- },
- mounted() {},
- data() {
- return {
- lists: [],
- isInCount: true,
- uploading: false
- };
- },
- watch: {
- fileList: {
- immediate: true,
- handler(val) {
- val.map(value => {
- // 首先检查内部是否已经添加过这张图片,因为外部绑定了一个对象给fileList的话(对象引用),进行修改外部fileList
- // 时,会触发watch,导致重新把原来的图片再次添加到this.lists
- // 数组的some方法意思是,只要数组元素有任意一个元素条件符合,就返回true,而另一个数组的every方法的意思是数组所有元素都符合条件才返回true
- let tmp = this.lists.some(val => {
- return val.url == value.url;
- })
- // 如果内部没有这个图片(tmp为false),则添加到内部
- !tmp && this.lists.push({ url: value.url, error: false, progress: 100 });
- });
- }
- },
- // 监听lists的变化,发出事件
- lists(n) {
- this.$emit('on-list-change', n, this.index);
- }
- },
- methods: {
- // 清除列表
- clear() {
- this.lists = [];
- },
- // 重新上传队列中上传失败的所有文件
- reUpload() {
- this.uploadFile();
- },
- // 选择图片
- selectFile() {
- if (this.disabled) return;
- const { name = '', maxCount, multiple, maxSize, sizeType, lists, camera, compressed, maxDuration, sourceType } = this;
- let chooseFile = null;
- const newMaxCount = maxCount - lists.length;
- // 设置为只选择图片的时候使用 chooseImage 来实现
- chooseFile = new Promise((resolve, reject) => {
- uni.chooseImage({
- count: multiple ? (newMaxCount > 9 ? 9 : newMaxCount) : 1,
- sourceType: sourceType,
- sizeType,
- success: resolve,
- fail: reject
- });
- });
- chooseFile
- .then(res => {
- let file = null;
- let listOldLength = this.lists.length;
- res.tempFiles.map((val, index) => {
- // 检查文件后缀是否允许,如果不在this.limitType内,就会返回false
- if(!this.checkFileExt(val)) return ;
-
- // 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
- if (!multiple && index >= 1) return;
- if (val.size > maxSize) {
- this.$emit('on-oversize', val, this.lists, this.index);
- this.showToast('超出允许的文件大小');
- } else {
- if (maxCount <= lists.length) {
- this.$emit('on-exceed', val, this.lists, this.index);
- this.showToast('超出最大允许的文件个数');
- return;
- }
- lists.push({
- url: val.path,
- progress: 0,
- error: false,
- file: val
- });
- }
- });
- // 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
- this.$emit('on-choose-complete', this.lists, this.index);
- if (this.autoUpload) this.uploadFile(listOldLength);
- })
- .catch(error => {
- this.$emit('on-choose-fail', error);
- });
- },
- // 提示用户消息
- showToast(message, force = false) {
- if (this.showTips || force) {
- uni.showToast({
- title: message,
- icon: 'none'
- });
- }
- },
- // 该方法供用户通过ref调用,手动上传
- upload() {
- this.uploadFile();
- },
- // 对失败的图片重新上传
- retry(index) {
- this.lists[index].progress = 0;
- this.lists[index].error = false;
- this.lists[index].response = null;
- uni.showLoading({
- title: '重新上传'
- });
- this.uploadFile(index);
- },
- // 上传图片
- async uploadFile(index = 0) {
- if (this.disabled) return;
- if (this.uploading) return;
- // 全部上传完成
- if (index >= this.lists.length) {
- this.$emit('on-uploaded', this.lists, this.index);
- return;
- }
- // 检查是否是已上传或者正在上传中
- if (this.lists[index].progress == 100) {
- if (this.autoUpload == false) this.uploadFile(index + 1);
- return;
- }
- // 执行before-upload钩子
- if(this.beforeUpload && typeof(this.beforeUpload) === 'function') {
- // 执行回调,同时传入索引和文件列表当作参数
- // 在微信,支付宝等环境(H5正常),会导致父组件定义的customBack()函数体中的this变成子组件的this
- // 通过bind()方法,绑定父组件的this,让this.customBack()的this为父组件的上下文
- // 因为upload组件可能会被嵌套在其他组件内,比如u-form,这时this.$parent其实为u-form的this,
- // 非页面的this,所以这里需要往上历遍,一直寻找到最顶端的$parent,这里用了this.$u.$parent.call(this)
- // 明白意思即可,无需纠结this.$u.$parent.call(this)的细节
- let beforeResponse = this.beforeUpload.bind(this.$u.$parent.call(this))(index, this.lists);
- // 判断是否返回了promise
- if (!!beforeResponse && typeof beforeResponse.then === 'function') {
- await beforeResponse.then(res => {
- // promise返回成功,不进行动作,继续上传
- }).catch(err => {
- // 进入catch回调的话,继续下一张
- return this.uploadFile(index + 1);
- })
- } else if(beforeResponse === false) {
- // 如果返回false,继续下一张图片的上传
- return this.uploadFile(index + 1);
- } else {
- // 此处为返回"true"的情形,这里不写代码,就跳过此处,继续执行当前的上传逻辑
- }
- }
- // 检查上传地址
- if (!this.action) {
- this.showToast('请配置上传地址', true);
- return;
- }
- this.lists[index].error = false;
- this.uploading = true;
- // 创建上传对象
- const task = uni.uploadFile({
- url: this.action,
- filePath: this.lists[index].url,
- name: this.name,
- formData: this.formData,
- header: this.header,
- // #ifdef MP-ALIPAY
- fileType:'image',
- // #endif
- success: res => {
- // 判断是否json字符串,将其转为json格式
- let data = this.toJson && this.$u.test.jsonString(res.data) ? JSON.parse(res.data) : res.data;
- if (![200, 201, 204].includes(res.statusCode)) {
- this.uploadError(index, data);
- } else {
- // 上传成功
- this.lists[index].response = data;
- this.lists[index].progress = 100;
- this.lists[index].error = false;
- this.$emit('on-success', data, index, this.lists, this.index);
- }
- },
- fail: e => {
- this.uploadError(index, e);
- },
- complete: res => {
- uni.hideLoading();
- this.uploading = false;
- this.uploadFile(index + 1);
- this.$emit('on-change', res, index, this.lists, this.index);
- }
- });
- task.onProgressUpdate(res => {
- if (res.progress > 0) {
- this.lists[index].progress = res.progress;
- this.$emit('on-progress', res, index, this.lists, this.index);
- }
- });
- },
- // 上传失败
- uploadError(index, err) {
- this.lists[index].progress = 0;
- this.lists[index].error = true;
- this.lists[index].response = null;
- this.$emit('on-error', err, index, this.lists, this.index);
- this.showToast('上传失败,请重试');
- },
- // 删除一个图片
- deleteItem(index) {
- uni.showModal({
- title: '提示',
- content: '您确定要删除此项吗?',
- success: async (res) => {
- if (res.confirm) {
- // 先检查是否有定义before-remove移除前钩子
- // 执行before-remove钩子
- if(this.beforeRemove && typeof(this.beforeRemove) === 'function') {
- // 此处钩子执行 原理同before-remove参数,见上方注释
- let beforeResponse = this.beforeRemove.bind(this.$u.$parent.call(this))(index, this.lists);
- // 判断是否返回了promise
- if (!!beforeResponse && typeof beforeResponse.then === 'function') {
- await beforeResponse.then(res => {
- // promise返回成功,不进行动作,继续上传
- this.handlerDeleteItem(index);
- }).catch(err => {
- // 如果进入promise的reject,终止删除操作
- this.showToast('已终止移除');
- })
- } else if(beforeResponse === false) {
- // 返回false,终止删除
- this.showToast('已终止移除');
- } else {
- // 如果返回true,执行删除操作
- this.handlerDeleteItem(index);
- }
- } else {
- // 如果不存在before-remove钩子,
- this.handlerDeleteItem(index);
- }
- }
- }
- });
- },
- // 执行移除图片的动作,上方代码只是判断是否可以移除
- handlerDeleteItem(index) {
- // 如果文件正在上传中,终止上传任务,进度在0 < progress < 100则意味着正在上传
- if (this.lists[index].progress < 100 && this.lists[index].progress > 0) {
- typeof this.lists[index].uploadTask != 'undefined' && this.lists[index].uploadTask.abort();
- }
- this.lists.splice(index, 1);
- this.$forceUpdate();
- this.$emit('on-remove', index, this.lists, this.index);
- this.showToast('移除成功');
- },
- // 用户通过ref手动的形式,移除一张图片
- remove(index) {
- // 判断索引的合法范围
- if (index >= 0 && index < this.lists.length) {
- this.lists.splice(index, 1);
- this.$emit('on-list-change', this.lists, this.index);
- }
- },
- // 预览图片
- doPreviewImage(url, index) {
- if (!this.previewFullImage) return;
- const images = this.lists.map(item => item.url || item.path);
- uni.previewImage({
- urls: images,
- current: url,
- success: () => {
- this.$emit('on-preview', url, this.lists, this.index);
- },
- fail: () => {
- uni.showToast({
- title: '预览图片失败',
- icon: 'none'
- });
- }
- });
- },
- // 判断文件后缀是否允许
- checkFileExt(file) {
- // 检查是否在允许的后缀中
- let noArrowExt = false;
- // 获取后缀名
- let fileExt = '';
- const reg = /.+\./;
- // 如果是H5,需要从name中判断
- // #ifdef H5
- fileExt = file.name.replace(reg, "").toLowerCase();
- // #endif
- // 非H5,需要从path中读取后缀
- // #ifndef H5
- fileExt = file.path.replace(reg, "").toLowerCase();
- // #endif
- // 使用数组的some方法,只要符合limitType中的一个,就返回true
- noArrowExt = this.limitType.some(ext => {
- // 转为小写
- return ext.toLowerCase() === fileExt;
- })
- if(!noArrowExt) this.showToast(`不允许选择${fileExt}格式的文件`);
- return noArrowExt;
- }
- }
- };
- </script>
- <style lang="scss" scoped>
- @import '../../libs/css/style.components.scss';
- .u-upload {
- @include vue-flex;
- flex-wrap: wrap;
- align-items: center;
- }
- .u-list-item {
- width: 200rpx;
- height: 200rpx;
- overflow: hidden;
- margin: 10rpx;
- background: rgb(244, 245, 246);
- position: relative;
- border-radius: 10rpx;
- /* #ifndef APP-NVUE */
- display: flex;
- /* #endif */
- align-items: center;
- justify-content: center;
- }
- .u-preview-wrap {
- border: 1px solid rgb(235, 236, 238);
- }
- .u-add-wrap {
- flex-direction: column;
- color: $u-content-color;
- font-size: 26rpx;
- }
- .u-add-tips {
- margin-top: 20rpx;
- line-height: 40rpx;
- }
- .u-add-wrap__hover {
- background-color: rgb(235, 236, 238);
- }
- .u-preview-image {
- display: block;
- width: 100%;
- height: 100%;
- border-radius: 10rpx;
- }
- .u-delete-icon {
- position: absolute;
- top: 10rpx;
- right: 10rpx;
- z-index: 10;
- background-color: $u-type-error;
- border-radius: 100rpx;
- width: 44rpx;
- height: 44rpx;
- @include vue-flex;
- align-items: center;
- justify-content: center;
- }
- .u-icon {
- @include vue-flex;
- align-items: center;
- justify-content: center;
- }
- .u-progress {
- position: absolute;
- bottom: 10rpx;
- left: 8rpx;
- right: 8rpx;
- z-index: 9;
- width: auto;
- }
- .u-error-btn {
- color: #ffffff;
- background-color: $u-type-error;
- font-size: 20rpx;
- padding: 4px 0;
- text-align: center;
- position: absolute;
- bottom: 0;
- left: 0;
- right: 0;
- z-index: 9;
- line-height: 1;
- }
- </style>
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