<!-- 单图上传组件 -->
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<template>
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<el-upload
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v-model="modelValue"
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class="single-upload"
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list-type="picture-card"
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:show-file-list="false"
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:accept="props.accept"
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:before-upload="handleBeforeUpload"
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:http-request="handleUpload"
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:on-success="onSuccess"
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:on-error="onError"
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multiple
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>
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<template #default>
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<el-image v-if="modelValue" :src="modelValue" />
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<el-icon v-if="modelValue" class="single-upload__delete-btn" @click.stop="handleDelete">
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<CircleCloseFilled />
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</el-icon>
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<el-icon v-else class="single-upload__add-btn">
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<Plus />
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</el-icon>
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</template>
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</el-upload>
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</template>
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<script setup lang="ts">
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import { UploadRawFile, UploadRequestOptions } from "element-plus";
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import FileAPI, { FileInfo } from "@/api/file.api";
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const props = defineProps({
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/**
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* 请求携带的额外参数
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*/
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data: {
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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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/**
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* 上传文件的参数名
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*/
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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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/**
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* 最大文件大小（单位：M）
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*/
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maxFileSize: {
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type: Number,
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default: 10,
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},
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/**
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* 上传图片格式，默认支持所有图片(image/*)，指定格式示例：'.png,.jpg,.jpeg,.gif,.bmp'
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*/
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accept: {
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type: String,
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default: "image/*",
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},
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/**
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* 自定义样式，用于设置组件的宽度和高度等其他样式
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*/
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style: {
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type: Object,
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default: () => {
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return {
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width: "150px",
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height: "150px",
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};
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},
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},
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});
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const modelValue = defineModel("modelValue", {
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type: String,
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default: () => "",
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});
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/**
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* 限制用户上传文件的格式和大小
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*/
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function handleBeforeUpload(file: UploadRawFile) {
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// 校验文件类型：虽然 accept 属性限制了用户在文件选择器中可选的文件类型，但仍需在上传时再次校验文件实际类型，确保符合 accept 的规则
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const acceptTypes = props.accept.split(",").map((type) => type.trim());
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// 检查文件格式是否符合 accept
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const isValidType = acceptTypes.some((type) => {
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if (type === "image/*") {
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// 如果是 image/*，检查 MIME 类型是否以 "image/" 开头
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return file.type.startsWith("image/");
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} else if (type.startsWith(".")) {
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// 如果是扩展名 (.png, .jpg)，检查文件名是否以指定扩展名结尾
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return file.name.toLowerCase().endsWith(type);
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} else {
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// 如果是具体的 MIME 类型 (image/png, image/jpeg)，检查是否完全匹配
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return file.type === type;
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}
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});
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if (!isValidType) {
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ElMessage.warning(`上传文件的格式不正确，仅支持：${props.accept}`);
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return false;
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}
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// 限制文件大小
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if (file.size > props.maxFileSize * 1024 * 1024) {
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ElMessage.warning("上传图片不能大于" + props.maxFileSize + "M");
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return false;
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}
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return true;
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}
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/*
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* 上传图片
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*/
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function handleUpload(options: UploadRequestOptions) {
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return new Promise((resolve, reject) => {
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const file = options.file;
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const formData = new FormData();
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formData.append(props.name, file);
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// 处理附加参数
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Object.keys(props.data).forEach((key) => {
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formData.append(key, props.data[key]);
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});
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FileAPI.upload(formData)
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.then((data) => {
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resolve(data);
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})
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.catch((error) => {
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reject(error);
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});
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});
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}
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/**
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* 删除图片
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*/
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function handleDelete() {
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modelValue.value = "";
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}
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/**
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* 上传成功回调
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*
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* @param fileInfo 上传成功后的文件信息
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*/
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const onSuccess = (fileInfo: FileInfo) => {
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ElMessage.success("上传成功");
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modelValue.value = fileInfo.url;
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};
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/**
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* 上传失败回调
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*/
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const onError = (error: any) => {
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console.log("onError");
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ElMessage.error("上传失败: " + error.message);
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};
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</script>
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<style scoped lang="scss">
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:deep(.el-upload--picture-card) {
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/* width: var(--el-upload-picture-card-size);
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height: var(--el-upload-picture-card-size); */
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width: v-bind("props.style.width");
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height: v-bind("props.style.height");
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}
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.single-upload {
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position: relative;
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overflow: hidden;
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cursor: pointer;
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border: 1px var(--el-border-color) solid;
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border-radius: 5px;
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&:hover {
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border-color: var(--el-color-primary);
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}
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&__delete-btn {
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position: absolute;
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top: 1px;
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right: 1px;
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font-size: 16px;
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color: #ff7901;
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cursor: pointer;
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background: #fff;
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border-radius: 100%;
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:hover {
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color: #ff4500;
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}
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}
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}
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</style>
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