| <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.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.$parent.call(this))(index, this.lists); | 
|                 // 判断是否返回了promise | 
|                 if (!!beforeResponse && typeof beforeResponse.then === 'function') { | 
|                     await beforeResponse.then(res => { | 
|                         // promise返回成功,不进行动作,继续上传 | 
|                     }).catch(err => { | 
|                         // 进入catch回调的话,继续下一张 | 
|                         return this.uploadFile(index + 1); | 
|                     }) | 
|                 } else if(beforeResponse === false) { | 
|                     // 如果返回false,继续下一张图片的上传 | 
|                     return this.uploadFile(index + 1); | 
|                 } else { | 
|                     // 此处为返回"true"的情形,这里不写代码,就跳过此处,继续执行当前的上传逻辑 | 
|                 } | 
|             } | 
|             // 检查上传地址 | 
|             if (!this.action) { | 
|                 this.showToast('请配置上传地址', true); | 
|                 return; | 
|             } | 
|             this.lists[index].error = false; | 
|             this.uploading = true; | 
|             // 创建上传对象 | 
|             const task = uni.uploadFile({ | 
|                 url: this.action, | 
|                 filePath: this.lists[index].url, | 
|                 name: this.name, | 
|                 formData: this.formData, | 
|                 header: this.header, | 
|                 success: res => { | 
|                     // 判断是否json字符串,将其转为json格式 | 
|                     let data = this.toJson && this.$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].process < 100 && this.lists[index].process > 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> |