658 lines
19 KiB
Vue
658 lines
19 KiB
Vue
<template>
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<view class="u-upload" v-if="!disabled">
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<view
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v-if="showUploadList"
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class="u-list-item u-preview-wrap"
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v-for="(item, index) in lists"
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:key="index"
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:style="{
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width: $u.addUnit(width),
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height: $u.addUnit(height)
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}"
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>
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<view
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v-if="deletable"
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class="u-delete-icon"
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@tap.stop="deleteItem(index)"
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:style="{
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background: delBgColor
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}"
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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
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v-if="showProgress && item.progress > 0 && item.progress != 100 && !item.error"
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:show-percent="false"
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height="16"
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class="u-progress"
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:percent="item.progress"
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></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" :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
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v-if="!customBtn"
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class="u-list-item u-add-wrap"
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hover-class="u-add-wrap__hover"
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hover-stay-time="150"
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:style="{
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width: $u.addUnit(width),
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height: $u.addUnit(height)
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}"
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>
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<u-icon name="plus" class="u-add-btn" size="40"></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 | 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
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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
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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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// 内部预览图片区域和选择图片按钮的区域高度
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height: {
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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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// 如果上传后的返回值为json字符串,是否自动转json
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toJson: {
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type: Boolean,
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default: true
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},
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// 上传前的钩子,每个文件上传前都会执行
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beforeUpload: {
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type: Function,
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default: null
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},
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// 移除文件前的钩子
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beforeRemove: {
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type: Function,
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default: null
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},
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// 允许上传的图片后缀
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limitType:{
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type: Array,
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default() {
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// 支付宝小程序真机选择图片的后缀为"image"
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// https://opendocs.alipay.com/mini/api/media-image
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return ['png', 'jpg', 'jpeg', 'webp', 'gif', 'image'];
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}
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},
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// 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
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index: {
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type: [Number, String],
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default: ''
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}
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},
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mounted() {},
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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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// 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
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// 时,会触发watch,导致重新把原来的图片再次添加到this.lists
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// 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
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let tmp = this.lists.some(val => {
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return val.url == value.url;
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})
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// 如果内部没有这个图片(tmp为false),则添加到内部
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!tmp && 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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// 监听lists的变化,发出事件
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lists(n) {
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this.$emit('on-list-change', n, this.index);
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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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},
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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 { name = '', maxCount, multiple, maxSize, sizeType, lists, camera, compressed, maxDuration, sourceType } = 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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// 检查文件后缀是否允许,如果不在this.limitType内,就会返回false
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if(!this.checkFileExt(val)) return ;
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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.$emit('on-oversize', val, this.lists, this.index);
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this.showToast('超出允许的文件大小');
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} else {
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if (maxCount <= lists.length) {
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this.$emit('on-exceed', val, this.lists, this.index);
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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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file: val
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});
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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.$emit('on-choose-complete', this.lists, this.index);
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if (this.autoUpload) this.uploadFile(listOldLength);
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})
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.catch(error => {
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this.$emit('on-choose-fail', 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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async 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.$emit('on-uploaded', this.lists, this.index);
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return;
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}
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// 检查是否是已上传或者正在上传中
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if (this.lists[index].progress == 100) {
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if (this.autoUpload == false) this.uploadFile(index + 1);
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return;
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}
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// 执行before-upload钩子
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if(this.beforeUpload && typeof(this.beforeUpload) === 'function') {
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// 执行回调,同时传入索引和文件列表当作参数
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// 在微信,支付宝等环境(H5正常),会导致父组件定义的customBack()函数体中的this变成子组件的this
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// 通过bind()方法,绑定父组件的this,让this.customBack()的this为父组件的上下文
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// 因为upload组件可能会被嵌套在其他组件内,比如u-form,这时this.$parent其实为u-form的this,
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// 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.$parent.call(this)
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// 明白意思即可,无需纠结this.$u.$parent.call(this)的细节
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let beforeResponse = this.beforeUpload.bind(this.$u.$parent.call(this))(index, this.lists);
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// 判断是否返回了promise
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if (!!beforeResponse && typeof beforeResponse.then === 'function') {
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await beforeResponse.then(res => {
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// promise返回成功,不进行动作,继续上传
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}).catch(err => {
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// 进入catch回调的话,继续下一张
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return this.uploadFile(index + 1);
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})
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} else if(beforeResponse === false) {
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// 如果返回false,继续下一张图片的上传
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return this.uploadFile(index + 1);
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} else {
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// 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
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}
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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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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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// #ifdef MP-ALIPAY
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fileType:'image',
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// #endif
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success: res => {
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// 判断是否json字符串,将其转为json格式
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let data = this.toJson && this.$u.test.jsonString(res.data) ? JSON.parse(res.data) : res.data;
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if (![200, 201, 204].includes(res.statusCode)) {
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this.uploadError(index, data);
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} else {
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// 上传成功
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this.lists[index].response = data;
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this.lists[index].progress = 100;
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this.lists[index].error = false;
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this.$emit('on-success', data, index, this.lists, this.index);
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||
}
|
||
},
|
||
fail: e => {
|
||
this.uploadError(index, e);
|
||
},
|
||
complete: res => {
|
||
uni.hideLoading();
|
||
this.uploading = false;
|
||
this.uploadFile(index + 1);
|
||
this.$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>
|