<template>
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<div class="upload-box">
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<el-upload
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v-model:file-list="_fileList"
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action="#"
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list-type="picture-card"
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:class="['upload', self_disabled ? 'disabled' : '', drag ? 'no-border' : '']"
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:multiple="true"
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:disabled="self_disabled"
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:limit="limit"
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:http-request="handleHttpUpload"
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:before-upload="beforeUpload"
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:on-exceed="handleExceed"
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:on-success="uploadSuccess"
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:on-error="uploadError"
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:drag="drag"
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:accept="fileType.join(',')"
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>
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<div class="upload-empty">
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<slot name="empty">
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<el-icon><Plus /></el-icon>
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<!-- <span>请上传图片</span> -->
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</slot>
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</div>
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<template #file="{ file }">
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<img :src="file.url" class="upload-image" />
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<div class="upload-handle" @click.stop>
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<div class="handle-icon" @click="handlePictureCardPreview(file)">
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<el-icon><ZoomIn /></el-icon>
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<span>查看</span>
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</div>
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<div v-if="!self_disabled" class="handle-icon" @click="handleRemove(file)">
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<el-icon><Delete /></el-icon>
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<span>删除</span>
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</div>
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</div>
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</template>
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</el-upload>
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<div class="el-upload__tip">
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<slot name="tip"></slot>
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</div>
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<el-image-viewer v-if="imgViewVisible" :url-list="[viewImageUrl]" @close="imgViewVisible = false" />
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</div>
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</template>
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<script setup lang="ts" name="UploadImgs">
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import { ref, computed, inject, watch } from "vue";
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import { Plus } from "@element-plus/icons-vue";
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import { uploadUserImg } from "@/api/modules/upload";
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import type { UploadProps, UploadFile, UploadUserFile, UploadRequestOptions } from "element-plus";
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import { ElNotification, formContextKey, formItemContextKey } from "element-plus";
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interface UploadFileProps {
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fileList: UploadUserFile[];
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api?: (params: any) => Promise<any>; // 上传图片的 api 方法，一般项目上传都是同一个 api 方法，在组件里直接引入即可 ==> 非必传
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drag?: boolean; // 是否支持拖拽上传 ==> 非必传（默认为 true）
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disabled?: boolean; // 是否禁用上传组件 ==> 非必传（默认为 false）
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limit?: number; // 最大图片上传数 ==> 非必传（默认为 5张）
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fileSize?: number; // 图片大小限制 ==> 非必传（默认为 5M）
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fileType?: File.ImageMimeType[]; // 图片类型限制 ==> 非必传（默认为 ["image/jpeg", "image/png", "image/gif"]）
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height?: string; // 组件高度 ==> 非必传（默认为 150px）
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width?: string; // 组件宽度 ==> 非必传（默认为 150px）
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borderRadius?: string; // 组件边框圆角 ==> 非必传（默认为 8px）
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}
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const props = withDefaults(defineProps<UploadFileProps>(), {
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fileList: () => [],
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drag: true,
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disabled: false,
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limit: 5,
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fileSize: 5,
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fileType: () => ["image/jpeg", "image/png", "image/gif"],
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height: "150px",
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width: "150px",
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borderRadius: "8px"
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});
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// 获取 el-form 组件上下文
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const formContext = inject(formContextKey, void 0);
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// 获取 el-form-item 组件上下文
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const formItemContext = inject(formItemContextKey, void 0);
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// 判断是否禁用上传和删除
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const self_disabled = computed(() => {
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return props.disabled || formContext?.disabled;
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});
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const _fileList = ref<UploadUserFile[]>(props.fileList);
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// 监听 props.fileList 列表默认值改变
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watch(
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() => props.fileList,
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(n: UploadUserFile[]) => {
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_fileList.value = n;
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}
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);
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/**
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* @description 文件上传之前判断
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* @param rawFile 选择的文件
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* */
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const beforeUpload: UploadProps["beforeUpload"] = rawFile => {
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const imgSize = rawFile.size / 1024 / 1024 < props.fileSize;
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const imgType = props.fileType.includes(rawFile.type as File.ImageMimeType);
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if (!imgType)
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ElNotification({
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title: "温馨提示",
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message: "上传图片不符合所需的格式！",
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type: "warning"
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});
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if (!imgSize)
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setTimeout(() => {
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ElNotification({
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title: "温馨提示",
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message: `上传图片大小不能超过 ${props.fileSize}M！`,
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type: "warning"
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});
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}, 0);
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return imgType && imgSize;
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};
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/**
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* @description 图片上传
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* @param options upload 所有配置项
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* */
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const handleHttpUpload = async (options: UploadRequestOptions) => {
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let formData = new FormData();
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formData.append("file", options.file);
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try {
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const api = props.api ?? uploadUserImg;
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const { data } = await api(formData);
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options.onSuccess(data);
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} catch (error) {
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options.onError(error as any);
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}
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};
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/**
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* @description 图片上传成功
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* @param response 上传响应结果
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* @param uploadFile 上传的文件
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* */
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const emit = defineEmits<{
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"update:fileList": [value: UploadUserFile[]];
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}>();
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const uploadSuccess = (response: { fileUrl: string } | undefined, uploadFile: UploadFile) => {
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if (!response) return;
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uploadFile.url = response.fileUrl;
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emit("update:fileList", _fileList.value);
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// 调用 el-form 内部的校验方法（可自动校验）
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formItemContext?.prop && formContext?.validateField([formItemContext.prop as string]);
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ElNotification({
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title: "温馨提示",
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message: "图片上传成功！",
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type: "success"
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});
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};
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/**
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* @description 删除图片
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* @param file 删除的文件
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* */
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const handleRemove = (file: UploadFile) => {
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_fileList.value = _fileList.value.filter(item => item.url !== file.url || item.name !== file.name);
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emit("update:fileList", _fileList.value);
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};
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/**
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* @description 图片上传错误
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* */
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const uploadError = () => {
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ElNotification({
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title: "温馨提示",
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message: "图片上传失败，请您重新上传！",
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type: "error"
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});
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};
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/**
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* @description 文件数超出
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* */
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const handleExceed = () => {
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ElNotification({
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title: "温馨提示",
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message: `当前最多只能上传 ${props.limit} 张图片，请移除后上传！`,
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type: "warning"
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});
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};
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/**
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* @description 图片预览
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* @param file 预览的文件
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* */
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const viewImageUrl = ref("");
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const imgViewVisible = ref(false);
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const handlePictureCardPreview: UploadProps["onPreview"] = file => {
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viewImageUrl.value = file.url!;
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imgViewVisible.value = true;
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};
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</script>
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<style scoped lang="scss">
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.is-error {
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.upload {
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:deep(.el-upload--picture-card),
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:deep(.el-upload-dragger) {
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border: 1px dashed var(--el-color-danger) !important;
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&:hover {
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border-color: var(--el-color-primary) !important;
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}
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}
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}
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}
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:deep(.disabled) {
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.el-upload--picture-card,
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.el-upload-dragger {
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cursor: not-allowed;
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background: var(--el-disabled-bg-color) !important;
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border: 1px dashed var(--el-border-color-darker);
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&:hover {
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border-color: var(--el-border-color-darker) !important;
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}
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}
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}
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.upload-box {
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.no-border {
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:deep(.el-upload--picture-card) {
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border: none !important;
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}
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}
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:deep(.upload) {
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.el-upload-dragger {
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display: flex;
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align-items: center;
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justify-content: center;
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width: 100%;
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height: 100%;
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padding: 0;
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overflow: hidden;
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border: 1px dashed var(--el-border-color-darker);
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border-radius: v-bind(borderRadius);
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&:hover {
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border: 1px dashed var(--el-color-primary);
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}
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}
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.el-upload-dragger.is-dragover {
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background-color: var(--el-color-primary-light-9);
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border: 2px dashed var(--el-color-primary) !important;
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}
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.el-upload-list__item,
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.el-upload--picture-card {
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width: v-bind(width);
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height: v-bind(height);
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background-color: transparent;
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border-radius: v-bind(borderRadius);
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}
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.upload-image {
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width: 100%;
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height: 100%;
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object-fit: contain;
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}
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.upload-handle {
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position: absolute;
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top: 0;
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right: 0;
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box-sizing: border-box;
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display: flex;
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align-items: center;
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justify-content: center;
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width: 100%;
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height: 100%;
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cursor: pointer;
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background: rgb(0 0 0 / 60%);
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opacity: 0;
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transition: var(--el-transition-duration-fast);
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.handle-icon {
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display: flex;
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flex-direction: column;
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align-items: center;
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justify-content: center;
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padding: 0 6%;
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color: aliceblue;
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.el-icon {
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margin-bottom: 15%;
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font-size: 140%;
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}
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span {
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font-size: 100%;
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}
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}
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}
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.el-upload-list__item {
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&:hover {
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.upload-handle {
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opacity: 1;
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}
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}
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}
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.upload-empty {
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display: flex;
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flex-direction: column;
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align-items: center;
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font-size: 12px;
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line-height: 30px;
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color: var(--el-color-info);
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.el-icon {
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font-size: 28px;
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color: var(--el-text-color-secondary);
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}
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}
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}
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.el-upload__tip {
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line-height: 15px;
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text-align: center;
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}
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}
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</style>
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