510 lines
15 KiB
Vue
510 lines
15 KiB
Vue
<template>
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<view class="u-upload" v-if="!disabled">
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<view v-if="showUploadList" class="u-list-item u-preview-wrap" v-for="(item, index) in lists" :key="index" :style="{
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width: width + 'rpx',
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height: width + 'rpx'
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}">
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<view v-if="deletable" class="u-delete-icon" @tap.stop="deleteItem(index)" :style="{
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background: delBgColor
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}">
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<u-icon class="u-icon" :name="delIcon" size="20" :color="delColor"></u-icon>
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</view>
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<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>
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<view @tap.stop="retry(index)" v-if="item.error" class="u-error-btn">点击重试</view>
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<image @tap.stop="doPreviewImage(item.url || item.path, index)" class="u-preview-image" v-if="!item.isImage" :src=" item.url || item.path "
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:mode="imageMode"></image>
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</view>
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<slot name="file" :file="lists"></slot>
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<view style="display: inline-block;" @tap="selectFile" v-if="maxCount > lists.length">
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<slot name="addBtn"></slot>
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<view v-if="!customBtn" class="u-list-item u-add-wrap" hover-class="u-add-wrap__hover" hover-stay-time="150" :style="{
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width: width + 'rpx',
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height: width + 'rpx'
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}">
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<u-icon name="plus" class="u-add-btn" size="40" @click="selectFile"></u-icon>
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<view class="u-add-tips">{{uploadText}}</view>
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</view>
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</view>
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</view>
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</template>
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<script>
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/**
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* upload 图片上传
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* @description 该组件用于上传图片场景
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* @tutorial https://www.uviewui.com/components/upload.html
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* @property {String} action 服务器上传地址
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* @property {String Number} max-count 最大选择图片的数量（默认99）
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* @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）
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* @property {Boolean} show-progress 是否显示进度条（默认true）
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* @property {Boolean} disabled 是否启用(显示/移仓)组件（默认false）
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* @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）
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* @property {String} del-icon 右上角删除图标名称，只能为uView内置图标
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* @property {String} del-bg-color 右上角关闭按钮的背景颜色
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* @property {String} del-color 右上角关闭按钮图标的颜色
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* @property {Object} header 上传携带的头信息，对象形式
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* @property {Object} form-data 上传额外携带的参数
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* @property {String} name 上传文件的字段名，供后端获取使用（默认file）
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* @property {Array<String>} size-type original 原图，compressed 压缩图，默认二者都有（默认['original', 'compressed']）
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* @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']）
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* @property {Boolean} preview-full-image 是否可以通过uni.previewImage预览已选择的图片（默认true）
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* @property {Boolean} multiple 是否开启图片多选，部分安卓机型不支持（默认true）
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* @property {Boolean} deletable 是否显示删除图片的按钮（默认true）
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* @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）
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* @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
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* @property {Boolean} upload-text 选择图片按钮的提示文字（默认“选择图片”）
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* @property {Boolean} auto-upload 选择完图片是否自动上传，见上方说明（默认true）
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* @property {Boolean} show-tips 特殊情况下是否自动提示toast，见上方说明（默认true）
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* @property {Boolean} show-upload-list 是否显示组件内部的图片预览（默认true）
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* @event {Function} on-oversize 图片大小超出最大允许大小
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* @event {Function} on-preview 全屏预览图片时触发
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* @event {Function} on-remove 移除图片时触发
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* @event {Function} on-success 图片上传成功时触发
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* @event {Function} on-change 图片上传后，无论成功或者失败都会触发
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* @event {Function} on-error 图片上传失败时触发
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* @event {Function} on-progress 图片上传过程中的进度变化过程触发
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* @event {Function} on-uploaded 所有图片上传完毕触发
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* @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
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* @example <u-upload :action="action" :file-list="fileList" ></u-upload>
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*/
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export default {
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name: 'u-upload',
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props: {
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//是否显示组件自带的图片预览功能
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showUploadList: {
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type: Boolean,
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default: true
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},
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// 后端地址
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action: {
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type: String,
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default: ''
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},
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// 最大上传数量
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maxCount: {
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type: [String, Number],
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default: 52
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},
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// 是否显示进度条
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showProgress: {
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type: Boolean,
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default: true
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},
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// 是否启用
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disabled: {
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type: Boolean,
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default: false
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},
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// 预览上传的图片时的裁剪模式，和image组件mode属性一致
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imageMode: {
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type: String,
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default: 'aspectFill'
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},
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// 头部信息
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header: {
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type: Object,
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default () {
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return {}
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}
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},
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// 额外携带的参数
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formData: {
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type: Object,
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default () {
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return {}
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}
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},
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// 上传的文件字段名
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name: {
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type: String,
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default: 'file'
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},
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// 所选的图片的尺寸, 可选值为original compressed
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sizeType: {
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type: Array,
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default () {
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return ['original', 'compressed']
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}
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},
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sourceType: {
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type: Array,
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default () {
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return ['album', 'camera']
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}
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},
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// 是否在点击预览图后展示全屏图片预览
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previewFullImage: {
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type: Boolean,
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default: true
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},
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// 是否开启图片多选，部分安卓机型不支持
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multiple: {
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type: Boolean,
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default: true
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},
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// 是否展示删除按钮
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deletable: {
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type: Boolean,
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default: true
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},
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// 文件大小限制，单位为byte
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maxSize: {
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type: [String, Number],
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default: Number.MAX_VALUE
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},
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// 显示已上传的文件列表
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fileList: {
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type: Array,
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default () {
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return []
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}
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},
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// 上传区域的提示文字
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uploadText: {
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type: String,
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default: '选择图片'
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},
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// 是否自动上传
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autoUpload: {
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type: Boolean,
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default: true
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},
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// 是否显示toast消息提示
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showTips: {
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type: Boolean,
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default: true
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},
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// 是否通过slot自定义传入选择图标的按钮
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customBtn: {
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type: Boolean,
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default: false
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},
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// 内部预览图片区域和选择图片按钮的区域宽度，高等于宽
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width: {
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type: [String, Number],
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default: 200
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},
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// 右上角关闭按钮的背景颜色
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delBgColor: {
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type: String,
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default: '#fa3534'
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},
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// 右上角关闭按钮的叉号图标的颜色
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delColor: {
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type: String,
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default: '#ffffff'
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},
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// 右上角删除图标名称，只能为uView内置图标
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delIcon: {
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type: String,
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default: 'close'
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}
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},
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mounted() {
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},
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data() {
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return {
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lists: [],
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isInCount: true,
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uploading: false
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}
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},
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watch: {
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fileList: {
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immediate: true,
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handler(val) {
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val.map(value => {
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this.lists.push({url: value.url, error: false, progress: 100});
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})
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}
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},
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},
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methods: {
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// 清除列表
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clear() {
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this.lists = [];
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// 如果是清空形式的话，发出"on-list-change"事件
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this.$emit('on-list-change', this.lists);
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},
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// 重新上传队列中上传失败的所有文件
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reUpload() {
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this.uploadFile();
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},
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// 选择图片
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selectFile() {
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if (this.disabled) return;
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const {
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name = '', maxCount, multiple, maxSize, sizeType, lists, camera, compressed, maxDuration, sourceType
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} = this;
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let chooseFile = null;
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const newMaxCount = maxCount - lists.length;
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// 设置为只选择图片的时候使用 chooseImage 来实现
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chooseFile = new Promise((resolve, reject) => {
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uni.chooseImage({
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count: multiple ? (newMaxCount > 9 ? 9 : newMaxCount) : 1,
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sourceType: sourceType,
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sizeType,
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success: resolve,
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fail: reject
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});
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});
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chooseFile
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.then((res) => {
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let file = null;
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let listOldLength = this.lists.length;
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res.tempFiles.map((val, index) => {
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// 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
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if (!multiple && index >= 1) return;
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if (val.size > maxSize) {
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this.$emit('on-oversize', val, this.lists);
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this.showToast('超出允许的文件大小');
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} else {
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if(maxCount <= lists.length) {
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this.$emit('on-exceed', val, this.lists);
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this.showToast('超出最大允许的文件个数');
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return ;
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}
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lists.push({
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url: val.path,
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progress: 0,
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error: false
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});
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// 列表发生改变，发出事件，第二个参数为当前发生变化的项的索引
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this.$emit('on-list-change', this.lists);
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}
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})
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// 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
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this.$emit('on-choose-complete', this.lists);
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if(this.autoUpload) this.uploadFile(listOldLength);
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})
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.catch(error => {
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// this.$emit('on-error', error);
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});
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},
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// 提示用户消息
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showToast(message, force = false) {
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if(this.showTips || force) {
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uni.showToast({
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title: message,
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icon: "none"
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});
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}
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},
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// 该方法供用户通过ref调用，手动上传
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upload() {
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this.uploadFile();
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},
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// 对失败的图片重新上传
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retry(index) {
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this.lists[index].progress = 0;
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this.lists[index].error = false;
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this.lists[index].response = null;
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uni.showLoading({
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title: '重新上传'
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});
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this.uploadFile(index);
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},
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// 上传图片
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uploadFile(index = 0) {
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if (this.disabled) return;
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if(this.uploading) return ;
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// 全部上传完成
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if (index >= this.lists.length) {
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this.$emit('on-uploaded', this.lists);
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return ;
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}
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// 检查上传地址
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if (!this.action) {
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this.showToast('请配置上传地址', true);
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return;
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}
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// 检查是否是已上传或者正在上传中
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if (this.lists[index].progress == 100) {
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if(this.autoUpload == false) this.uploadFile(index + 1);
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return;
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}
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this.lists[index].error = false;
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this.uploading = true;
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// 创建上传对象
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const task = uni.uploadFile({
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url: this.action,
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filePath: this.lists[index].url,
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name: this.name,
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formData: this.formData,
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header: this.header,
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success: (res) => {
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if (![200,201].includes(res.statusCode)) {
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this.uploadError(index, res.data);
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} else {
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// 上传成功
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this.lists[index].response = res.data;
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this.lists[index].progress = 100;
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this.lists[index].error = false;
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this.$emit('on-success', res.data, index, this.lists);
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}
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},
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fail: (e) => {
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this.uploadError(index, e);
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},
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complete: (res) => {
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uni.hideLoading();
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this.uploading = false;
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this.uploadFile(index + 1);
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this.$emit('on-change', res, index, this.lists);
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}
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});
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task.onProgressUpdate((res) => {
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if (res.progress > 0) {
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this.lists[index].progress = res.progress;
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this.$emit('on-progress', res, index, this.lists);
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}
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});
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},
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// 上传失败
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uploadError(index, err) {
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this.lists[index].progress = 0;
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this.lists[index].error = true;
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this.lists[index].response = null;
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this.$emit('on-error', err, index, this.lists);
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this.showToast('上传失败，请重试');
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},
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// 删除一个图片
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deleteItem(index) {
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uni.showModal({
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title: '提示',
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content: '您确定要删除此项吗？',
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success: res => {
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if (res.confirm) {
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if (this.lists[index].process < 100 && this.lists[index].process > 0) {
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typeof this.lists[index].uploadTask != 'undefined' && this.lists[index].uploadTask.abort();
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}
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this.lists.splice(index, 1);
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this.$forceUpdate();
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this.$emit('on-remove', index, this.lists);
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this.showToast('移除成功');
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// 列表发生改变，发出事件
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this.$emit('on-list-change', this.lists);
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}
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}
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});
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},
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// 用户通过ref手动的形式，移除一张图片
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remove(index) {
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// 判断索引的合法范围
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if(index >= 0 && index < this.lists.length) {
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this.lists.splice(index, 1);
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this.$emit('on-list-change', this.lists);
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}
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},
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// 预览图片
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doPreviewImage(url, index) {
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if (!this.previewFullImage)
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return;
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const images = this.lists.map(item => item.url || item.path);
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uni.previewImage({
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urls: images,
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current: url,
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success: () => {
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this.$emit('on-preview', url, this.lists);
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},
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fail: () => {
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uni.showToast({
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title: '预览图片失败',
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icon: 'none'
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});
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}
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});
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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.u-upload {
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display: flex;
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flex-wrap: wrap;
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align-items: center;
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}
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.u-list-item {
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width: 200rpx;
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height: 200rpx;
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overflow: hidden;
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margin: 10rpx;
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background: rgb(244, 245, 246);
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position: relative;
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border-radius: 10rpx;
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display: inline-flex;
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align-items: center;
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justify-content: center;
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}
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.u-preview-wrap {
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border: 1px solid rgb(235, 236, 238);
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}
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.u-add-wrap {
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flex-direction: column;
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color: $u-content-color;
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font-size: 28rpx;
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}
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.u-add-tips {
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margin-top: 20rpx;
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}
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.u-add-wrap__hover {
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background-color: rgb(235, 236, 238);
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}
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.u-preview-image {
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display: block;
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width: 100%;
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height: 100%;
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}
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.u-delete-icon {
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position: absolute;
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top: 10rpx;
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right: 10rpx;
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z-index: 10;
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background-color: $u-type-error;
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border-radius: 100rpx;
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width: 44rpx;
|
||
height: 44rpx;
|
||
display: flex;
|
||
align-items: center;
|
||
justify-content: center;
|
||
}
|
||
|
||
.u-icon {
|
||
display: 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>
|