<template>
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<view v-if="!disabled" class="tn-image-upload-class tn-image-upload">
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<block v-if="showUploadList">
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<view
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v-for="(item, index) in lists"
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:key="index"
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class="tn-image-upload__item tn-image-upload__item-preview"
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:style="{
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width: $t.string.getLengthUnitValue(width),
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height: $t.string.getLengthUnitValue(height)
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}"
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>
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<!-- 删除按钮 -->
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<view
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v-if="deleteable"
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class="tn-image-upload__item-preview__delete"
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@tap.stop="deleteItem(index)"
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:style="{
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borderTopColor: deleteBackgroundColor
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}"
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>
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<view
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class="tn-image-upload__item-preview__delete--icon"
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:class="[`tn-icon-${deleteIcon}`]"
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:style="{
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color: deleteColor
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}"
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></view>
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</view>
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<!-- 进度条 -->
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<tn-line-progress
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v-if="showProgress && item.progress > 0 && !item.error"
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class="tn-image-upload__item-preview__progress"
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:percent="item.progress"
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:showPercent="false"
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:round="false"
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:height="8"
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></tn-line-progress>
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<!-- 重试按钮 -->
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<view v-if="item.error" class="tn-image-upload__item-preview__error-btn" @tap.stop="retry(index)">点击重试</view>
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<!-- 图片信息 -->
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<image
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class="tn-image-upload__item-preview__image"
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:src="item.url || item.path"
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:mode="imageMode"
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@tap.stop="doPreviewImage(item.url || item.path, index)"
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></image>
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</view>
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</block>
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<!-- <view v-if="$slots.file || $slots.$file" style="width: 100%;">
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</view> -->
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<!-- 自定义图片展示列表 -->
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<slot name="file" :file="lists"></slot>
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<!-- 添加按钮 -->
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<view v-if="maxCount > lists.length" class="tn-image-upload__add" :class="{'tn-image-upload__add--custom': customBtn}" @tap="selectFile">
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<!-- 添加按钮 -->
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<view
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v-if="!customBtn"
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class="tn-image-upload__item tn-image-upload__item-add"
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hover-class="tn-hover-class"
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hover-stay-time="150"
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:style="{
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width: $t.string.getLengthUnitValue(width),
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height: $t.string.getLengthUnitValue(height)
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}"
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>
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<view class="tn-image-upload__item-add--icon tn-icon-add"></view>
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<view class="tn-image-upload__item-add__tips">{{ uploadText }}</view>
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</view>
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<!-- 自定义添加按钮 -->
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<view>
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<slot name="addBtn"></slot>
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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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export default {
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name: 'tn-image-upload',
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props: {
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// 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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// 上传图片地址
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action: {
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type: String,
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default: ''
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},
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// 上传文件的字段名称
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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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// 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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// 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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// 是否禁用
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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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// 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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// 最大上传数量
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maxCount: {
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type: Number,
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default: 9
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},
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// 是否显示组件自带的图片预览
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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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// 预览上传图片的裁剪模式
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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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// 点击图片是否全屏预览
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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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// 是否显示删除按钮
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deleteable: {
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type: Boolean,
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default: true
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},
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// 删除按钮图标
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deleteIcon: {
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type: String,
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default: 'close'
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},
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// 删除按钮的背景颜色
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deleteBackgroundColor: {
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type: String,
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default: ''
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},
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// 删除按钮的颜色
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deleteColor: {
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type: String,
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default: ''
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},
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// 上传区域提示文字
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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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// 显示toast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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// 自定义选择图标按钮
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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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// 预览图片和选择图片区域的宽度
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width: {
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type: Number,
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default: 200
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},
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// 预览图片和选择图片区域的高度
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height: {
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type: Number,
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default: 200
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},
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// 选择图片的尺寸
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// 参考上传文档 https://uniapp.dcloud.io/api/media/image
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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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// 图片来源
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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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// 是否可以多选
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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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// 文件大小(byte)
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maxSize: {
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type: Number,
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default: 10 * 1024 * 1024
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},
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// 允许上传的类型
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limitType: {
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type: Array,
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default() {
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return ['png','jpg','jpeg','webp','gif','image']
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}
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},
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// 是否自定转换为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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// 上传前钩子函数，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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// 删除文件前钩子函数
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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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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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computed: {
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},
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data() {
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return {
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lists: [],
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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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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时，
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// 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(listVal => {
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return listVal.url === value.url
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})
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// 如果内部没有这张图片，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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immediate: true
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},
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lists(val) {
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this.$emit('on-list-change', val, 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 = '',
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maxCount,
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multiple,
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maxSize,
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sizeType,
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lists,
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camera,
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compressed,
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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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// 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,
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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.then(res => {
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let file = null
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let listOldLength = lists.length
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res.tempFiles.map((val, index) => {
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if (!this.checkFileExt(val)) return
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// 是否超出最大限制数量
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if (!multiple && index >= 1) return
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if (val.size > maxSize) {
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this.$emit('on-oversize', val, lists, this.index)
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this.showToast('超出可允许文件大小')
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} else {
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if (maxCount <= lists.length) {
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this.$emit('on-exceed', val, lists, this.index)
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this.showToast('超出最大允许的文件数')
|
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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this.$emit('on-choose-complete', this.lists, this.index)
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if (this.autoUpload) this.uploadFile(listOldLength)
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}).catch(err => {
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this.$emit('on-choose-fail', err)
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})
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},
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// 提示用户信息
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showToast(message, force = false) {
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if (this.showTips || force) {
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this.$t.message.toast(message)
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}
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},
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// 手动上传，通过ref进行调用
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upload() {
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this.uploadFile()
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},
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// 对失败图片进行再次上传
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retry(index) {
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this.lists[index].progress = 0
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this.lists[index].error = false
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this.lists[index].response = null
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this.$t.message.loading('重新上传')
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this.uploadFile(index)
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},
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// 上传文件
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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.$emit('on-uploaded', this.lists, this.index)
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return
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}
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// 检查是否已经全部上传或者上传中
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if (this.lists[index].progress === 100) {
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this.lists[index].uploadTask = null
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if (this.autoUpload) this.uploadFile(index + 1)
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return
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}
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// 执行before-upload钩子
|
if (this.beforeUpload && typeof(this.beforeUpload) === 'function') {
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// 在微信，支付宝等环境(H5正常)，会导致父组件定义的函数体中的this变成子组件的this
|
// 通过bind()方法，绑定父组件的this，让this的this为父组件的上下文
|
// 因为upload组件可能会被嵌套在其他组件内，比如tn-form，这时this.$parent其实为tn-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.$parent.call(this)
|
let beforeResponse = this.beforeUpload.bind(this.$t.$parent.call(this))(index, this.lists)
|
// 判断是否返回了Promise
|
if (!!beforeResponse && typeof beforeResponse.then === 'function') {
|
await beforeResponse.then(res => {
|
// promise返回成功，不进行操作继续
|
}).catch(err => {
|
// 进入catch回调的话，继续下一张
|
return this.uploadFile(index + 1)
|
})
|
} else if (beforeResponse === false) {
|
// 如果返回flase，继续下一张图片上传
|
return this.uploadFile(index + 1)
|
} else {
|
// 为true的情况，不进行操作
|
}
|
}
|
// 检查上传地址
|
if (!this.action) {
|
this.showToast('请配置上传地址', true)
|
return
|
}
|
this.lists[index].error = false
|
this.uploading = true
|
// 创建上传对象
|
const task = uni.uploadFile({
|
url: this.action,
|
filePath: this.lists[index].url,
|
name: this.name,
|
formData: this.formData,
|
header: this.header,
|
success: res => {
|
// 判断啊是否为json字符串，将其转换为json格式
|
let data = this.toJson && this.$t.test.jsonString(res.data) ? JSON.parse(res.data) : res.data
|
if (![200, 201, 204].includes(res.statusCode)) {
|
this.uploadError(index, data)
|
} else {
|
this.lists[index].response = data
|
this.lists[index].progress = 100
|
this.lists[index].error = false
|
this.$emit('on-success', data, index, this.lists, this.index)
|
}
|
},
|
fail: err => {
|
this.uploadError(index, err)
|
},
|
complete: res => {
|
this.$t.message.closeLoading()
|
this.uploading = false
|
this.uploadFile(index + 1)
|
this.$emit('on-change', res, index, this.lists, this.index)
|
}
|
})
|
this.lists[index].uploadTask = task
|
task.onProgressUpdate(res => {
|
if (res.progress > 0) {
|
this.lists[index].progress = res.progress
|
this.$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.showToast('上传失败，请重试')
|
this.$emit('on-error', err, index, this.lists, this.index)
|
},
|
// 删除一个图片
|
deleteItem(index) {
|
if (!this.deleteable) return
|
this.$t.message.modal(
|
'提示',
|
'您确定要删除吗？',
|
async () => {
|
// 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') {
|
let beforeResponse = this.beforeRemove.bind(this.$t.$parent.call(this))(index, this.lists)
|
// 判断是否返回promise
|
if (!!beforeResponse && typeof beforeResponse.then === 'function') {
|
await beforeResponse.then(res => {
|
// promise返回成功不进行操作
|
this.handlerDeleteItem(index)
|
}).catch(err => {
|
this.showToast('删除操作被中断')
|
})
|
} else if (beforeResponse === false) {
|
this.showToast('删除操作被中断')
|
} else {
|
this.handlerDeleteItem(index)
|
}
|
} else {
|
this.handlerDeleteItem(index)
|
}
|
}, true)
|
},
|
// 移除文件操作
|
handlerDeleteItem(index) {
|
// 如果文件正在上传中，终止上传任务
|
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('删除成功')
|
},
|
// 移除文件，通过ref手动形式进行调用
|
remove(index) {
|
if (!this.deleteable) return
|
// 判断索引合法
|
if (index >= 0 && index < this.lists.length) {
|
this.lists.splice(index, 1)
|
}
|
},
|
// 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.$emit('on-preview', url, this.lists, this.index)
|
},
|
fail: () => {
|
this.showToast('预览图片失败')
|
}
|
})
|
},
|
// 检查文件后缀是否合法
|
checkFileExt(file) {
|
// 是否为合法后缀
|
let noArrowExt = false
|
// 后缀名
|
let fileExt = ''
|
const reg = /.+\./
|
|
// #ifdef H5
|
fileExt = file.name.replace(reg, '').toLowerCase()
|
// #endif
|
// #ifndef H5
|
fileExt = file.path.replace(reg, '').toLowerCase()
|
// #endif
|
noArrowExt = this.limitType.some(ext => {
|
return ext.toLowerCase() === fileExt
|
})
|
if (!noArrowExt) this.showToast(`不支持${fileExt}格式的文件`)
|
return noArrowExt
|
}
|
}
|
}
|
</script>
|
|
<style lang="scss" scoped>
|
|
.tn-image-upload {
|
display: flex;
|
flex-direction: row;
|
flex-wrap: wrap;
|
align-items: center;
|
|
&__item {
|
/* #ifndef APP-NVUE */
|
display: flex;
|
/* #endif */
|
align-items: center;
|
justify-content: center;
|
width: 200rpx;
|
height: 200rpx;
|
overflow: hidden;
|
margin: 12rpx;
|
margin-left: 0;
|
background-color: $tn-font-holder-color;
|
position: relative;
|
border-radius: 10rpx;
|
|
&-preview {
|
border: 1rpx solid $tn-border-solid-color;
|
|
&__delete {
|
display: flex;
|
align-items: center;
|
justify-content: center;
|
position: absolute;
|
top: 0;
|
right: 0;
|
z-index: 10;
|
border-top: 60rpx solid;
|
border-left: 60rpx solid transparent;
|
border-top-color: $tn-color-red;
|
width: 0rpx;
|
height: 0rpx;
|
|
&--icon {
|
position: absolute;
|
top: -50rpx;
|
right: 6rpx;
|
color: #FFFFFF;
|
font-size: 24rpx;
|
line-height: 1;
|
}
|
}
|
|
&__progress {
|
position: absolute;
|
width: auto;
|
bottom: 0rpx;
|
left: 0rpx;
|
right: 0rpx;
|
z-index: 9;
|
/* #ifdef MP-WEIXIN */
|
display: inline-flex;
|
/* #endif */
|
}
|
|
&__error-btn {
|
position: absolute;
|
bottom: 0;
|
left: 0;
|
right: 0;
|
background-color: $tn-color-red;
|
color: #FFFFFF;
|
font-size: 20rpx;
|
padding: 8rpx 0;
|
text-align: center;
|
z-index: 9;
|
line-height: 1;
|
}
|
|
&__image {
|
display: block;
|
width: 100%;
|
height: 100%;
|
border-radius: 10rpx;
|
}
|
}
|
|
&-add {
|
flex-direction: column;
|
color: $tn-content-color;
|
font-size: 26rpx;
|
|
&--icon {
|
font-size: 40rpx;
|
}
|
|
&__tips {
|
margin-top: 20rpx;
|
line-height: 40rpx;
|
}
|
}
|
}
|
|
&__add {
|
width: auto;
|
display: inline-block;
|
|
&--custom {
|
width: 100%;
|
}
|
}
|
}
|
</style>
|
