【sgUploadImage】自定义组件：基于elementUI的el-upload封装的上传图片、相片组件，适用于上传缩略图、文章封面

sgUploadImage源码

<template><div :class="$options.name"><ul class="uploadImages"><liclass="uploadImage"v-loading="loadings[i]"v-for="(a, i) in uploadImages":key="i"@click="clickFile(a)"><img :src="a" @load="load(a, i)" v-if="typeof a !== 'number'" /><el-buttonv-if="showRemoveBtn(a)"class="remove-btn"type="text"icon="el-icon-delete"@click.stop="remove(a, i)"/></li></ul><el-alertv-if="alertMsg !== false"style="margin-top: 10px":closable="true":close-text="``":description="``":effect="'light'":show-icon="true":title="alertMsg || `最多可上传${limit}个图片,每个附件大小不超过${maxSize}M`":type="'warning'"/><el-uploadstyle="display: none"ref="upload":accept="accept":action="'#'":auto-upload="false":multiple="true":on-change="change":show-file-list="false"/><el-image ref="image" style="display: none" src="" :preview-src-list="[previewSrc]" /></div>
</template>
<script>
export default {name: "sgUploadImage",components: {},data() {return {accept: `.${this.$global.resourceTypes.find((v) => v.label == `图片`).suffixs.join(",.")}`,form: {},uploadBtn: null, //上传触发按钮disabled: false,alertMsg: ``, //如果为false就隐藏提示内容limit: 1, //默认只能传1张maxSize: 10, //默认最大传10MB的图片imgFiles: [], //图像的base64对象数组files: [], //图像的File对象数组previewSrc: null,loadings: [],};},props: ["data"],computed: {uploadImages() {return this.imgFiles && this.imgFiles.length ? this.imgFiles : 1;},},watch: {data: {handler(newValue, oldValue) {//console.log(`深度监听${this.$options.name}：`, newValue, oldValue);if (Object.keys(newValue || {}).length) {this.form = JSON.parse(JSON.stringify(newValue));} else {this.form = {};}this.disabled = this.form.disabled;this.alertMsg = this.form.alertMsg;// 获取外部回显上传列表----------------------------------------let files =typeof this.form.files === `string`? JSON.parse(this.form.files || "[]"): this.form.files || [];Array.isArray(files) || (files = [files]);this.files = files;this.imgFiles = [];this.files.forEach((v, i) => this.getImageSrc(v, i));// ----------------------------------------this.form.accept && (this.accept = this.form.accept);this.form.limit && (this.limit = this.form.limit);this.form.maxSize && (this.maxSize = this.form.maxSize);this.$nextTick(() => {let width = this.form.width || 200;let height = this.form.height || 150;this.$el.style.setProperty("--uploadImage_width", `${width}px`);this.$el.style.setProperty("--uploadImage_height", `${height}px`);this.$el.style.setProperty("--background",`url(http://via.placeholder.com/${width}x${height})`);this.uploadBtn = this.$refs.upload.$children[0].$refs.input;this.uploadBtn.webkitdirectory = this.form.webkitdirectory; //让el-upload支持上传文件夹});},deep: true, //深度监听immediate: true, //立即执行},},created() {},mounted() {},destroyed() {},methods: {load(d, idx) {this.$set(this.loadings, idx, false);},getImageSrc(file, idx = this.files.length - 1) {this.$set(this.loadings, idx, true);if (file.path) {this.imgFiles.push(this.$d.responseFile(file));} else {this.$g.file2Base64Image(file, (d) => this.imgFiles.push(d));}},showRemoveBtn(d) {return !(typeof d === "number");},remove(d, i) {this.files.splice(i, 1);this.imgFiles.splice(i, 1);this.$emit(`change`, { files: this.files });},showImage(previewSrc) {this.previewSrc = previewSrc;this.$refs.image.showViewer = true; //显示大图},clickFile(d) {if (this.disabled) return;if (typeof d === "number") {this.uploadBtn.click();} else {this.showImage(d);}},change(file) {if (this.files.length >= this.limit) {this.$message(`最多只能上传${this.limit}个文件`);} else {let fileSizeMB = file.size / 1024 / 1024; //转换文件大小（单位MB）if (this.maxSize && fileSizeMB > this.maxSize) {this.$message(`“${file.name}”文件大小超过${this.$g.getSize(this.maxSize * 1024 * 1024)}`);} else {this.files.push(file.raw);this.getImageSrc(file.raw);this.$emit(`change`, { files: this.files });}}},},
};
</script>
<style lang="scss" scoped>
.sgUploadImage {.uploadImages {display: flex;flex-wrap: wrap;align-content: flex-start;.uploadImage {flex-shrink: 0;margin-right: 10px;margin-bottom: 10px;position: relative;border-radius: 4px;width: var(--uploadImage_width);height: var(--uploadImage_height);/*背景图片*/background: #f5f7fa var(--background) no-repeat center / cover;img {width: 100%;height: 100%;object-position: center;object-fit: cover;}&:last-of-type {margin-bottom: 0;}&:hover {.remove-btn {opacity: 1;pointer-events: auto;}}.remove-btn {background-color: #f56c6c;border-radius: 88px;box-sizing: border-box;padding: 5px;color: white;cursor: pointer;transition: 0.2s;position: absolute;right: 10px;top: 10px;opacity: 0;pointer-events: none;&:hover {background-color: red;}}}}
}
</style>

应用

<sgUploadImage @change="getUploadFiles" />...getUploadFiles({ files }) {console.log(`获取上传文件：`, files);
},

基于基础的el-upload组件使用【实用的代码片段】基于elementUI的el-upload的上传文件对象获取代码片段，支持上传单个、多个File或文件夹(可以获取文件夹下钻子文件夹递归文件)-CSDN博客文章浏览阅读133次，点赞5次，收藏2次。文章浏览阅读192次。【代码】【sgUploadList】自定义组件：基于elementUI的el-upload封装的上传列表组件，适用于上传附件时。【sgUploadList】自定义组件：基于elementUI的el-upload封装的上传列表组件，适用于上传附件时-CSDN博客。https://blog.csdn.net/qq_37860634/article/details/144338242