<template>
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<div class="component-upload-image">
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<el-upload
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multiple
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:action="uploadImgUrl"
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list-type="picture-card"
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:on-success="handleUploadSuccess"
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:before-upload="handleBeforeUpload"
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:limit="limit"
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:on-error="handleUploadError"
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:on-exceed="handleExceed"
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ref="imageUpload"
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:before-remove="handleDelete"
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:show-file-list="true"
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:headers="headers"
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:file-list="fileList"
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:on-preview="handlePictureCardPreview"
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:class="{ hide: fileList.length >= limit }"
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>
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<el-icon class="avatar-uploader-icon"><plus /></el-icon>
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</el-upload>
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<!-- 上传提示 -->
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<div class="el-upload__tip" v-if="showTip">
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请上传
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<template v-if="fileSize">
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大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
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</template>
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<template v-if="fileType">
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格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
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</template>
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的文件
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</div>
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<el-dialog
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v-model="dialogVisible"
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title="预览"
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width="800px"
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append-to-body
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>
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<img
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:src="dialogImageUrl"
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style="display: block; max-width: 100%; margin: 0 auto"
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/>
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</el-dialog>
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</div>
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</template>
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<script setup>
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import { getToken } from "@/utils/auth";
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const props = defineProps({
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modelValue: [String, Object, Array],
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// 图片数量限制
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limit: {
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type: Number,
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default: 5,
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},
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// 大小限制(MB)
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fileSize: {
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type: Number,
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default: 5,
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},
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// 文件类型, 例如['png', 'jpg', 'jpeg']
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fileType: {
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type: Array,
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default: () => ["png", "jpg", "jpeg"],
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},
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// 是否显示提示
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isShowTip: {
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type: Boolean,
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default: true
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},
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});
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const { proxy } = getCurrentInstance();
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const emit = defineEmits();
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const number = ref(0);
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const uploadList = ref([]);
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const dialogImageUrl = ref("");
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const dialogVisible = ref(false);
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const baseUrl = import.meta.env.VITE_APP_BASE_API;
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const uploadImgUrl = ref(import.meta.env.VITE_APP_BASE_API + "/file/upload"); // 上传的图片服务器地址
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const headers = ref({ Authorization: "Bearer " + getToken() });
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const fileList = ref([]);
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const showTip = computed(
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() => props.isShowTip && (props.fileType || props.fileSize)
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);
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watch(() => props.modelValue, val => {
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if (val) {
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// 首先将值转为数组
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const list = Array.isArray(val) ? val : props.modelValue.split(",");
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// 然后将数组转为对象数组
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fileList.value = list.map(item => {
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if (typeof item === "string") {
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item = { name: item, url: item };
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}
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return item;
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});
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} else {
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fileList.value = [];
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return [];
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}
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},{ deep: true, immediate: true });
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// 上传前loading加载
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function handleBeforeUpload(file) {
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let isImg = false;
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if (props.fileType.length) {
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let fileExtension = "";
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if (file.name.lastIndexOf(".") > -1) {
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fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
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}
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isImg = props.fileType.some(type => {
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if (file.type.indexOf(type) > -1) return true;
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if (fileExtension && fileExtension.indexOf(type) > -1) return true;
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return false;
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});
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} else {
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isImg = file.type.indexOf("image") > -1;
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}
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if (!isImg) {
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proxy.$modal.msgError(`文件格式不正确，请上传${props.fileType.join("/")}图片格式文件!`);
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return false;
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}
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if (file.name.includes(',')) {
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proxy.$modal.msgError('文件名不正确，不能包含英文逗号!');
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return false;
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}
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if (props.fileSize) {
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const isLt = file.size / 1024 / 1024 < props.fileSize;
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if (!isLt) {
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proxy.$modal.msgError(`上传头像图片大小不能超过 ${props.fileSize} MB!`);
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return false;
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}
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}
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proxy.$modal.loading("正在上传图片，请稍候...");
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number.value++;
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}
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// 文件个数超出
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function handleExceed() {
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proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
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}
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// 上传成功回调
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function handleUploadSuccess(res, file) {
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if (res.code === 200) {
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uploadList.value.push({ name: res.data.url, url: res.data.url });
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uploadedSuccessfully();
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} else {
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number.value--;
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proxy.$modal.closeLoading();
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proxy.$modal.msgError(res.msg);
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proxy.$refs.imageUpload.handleRemove(file);
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uploadedSuccessfully();
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}
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}
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// 删除图片
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function handleDelete(file) {
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const findex = fileList.value.map(f => f.name).indexOf(file.name);
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if (findex > -1 && uploadList.value.length === number.value) {
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fileList.value.splice(findex, 1);
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emit("update:modelValue", listToString(fileList.value));
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return false;
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}
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}
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// 上传结束处理
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function uploadedSuccessfully() {
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if (number.value > 0 && uploadList.value.length === number.value) {
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fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value);
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uploadList.value = [];
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number.value = 0;
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emit("update:modelValue", listToString(fileList.value));
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proxy.$modal.closeLoading();
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}
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}
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// 上传失败
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function handleUploadError() {
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proxy.$modal.msgError("上传图片失败");
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proxy.$modal.closeLoading();
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}
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// 预览
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function handlePictureCardPreview(file) {
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dialogImageUrl.value = file.url;
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dialogVisible.value = true;
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}
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// 对象转成指定字符串分隔
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function listToString(list, separator) {
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let strs = "";
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separator = separator || ",";
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for (let i in list) {
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if (undefined !== list[i].url && list[i].url.indexOf("blob:") !== 0) {
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strs += list[i].url.replace(baseUrl, "") + separator;
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}
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}
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return strs != "" ? strs.substr(0, strs.length - 1) : "";
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}
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</script>
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<style scoped lang="scss">
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// .el-upload--picture-card 控制加号部分
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:deep(.hide .el-upload--picture-card) {
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display: none;
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}
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</style>
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