287 lines
7.9 KiB
Vue
287 lines
7.9 KiB
Vue
<template>
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<div class="component-upload-image">
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<el-upload
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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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name="file"
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:on-remove="handleRemove"
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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: this.fileList.length >= this.limit, rectangle: isRectangle }"
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:disabled="disabled"
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>
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<i class="el-icon-plus"></i>
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</el-upload>
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<!-- 上传提示 -->
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<div class="el-upload__tip" slot="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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<template v-if="fileHeight || fileWidth">
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尺寸为
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<b style="color: #f56c6c">宽{{ fileWidth ? fileWidth + 'px' : '不限制' }},高{{ fileHeight ? fileHeight + 'px' : '不限制' }}</b>
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</template>
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的文件
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</div>
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<el-dialog :visible.sync="dialogVisible" title="预览" width="500px" append-to-body>
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<img :src="dialogImageUrl" style="display: block; max-width: 100%; margin: 0 auto" />
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</el-dialog>
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</div>
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</template>
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<script>
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import { getToken } from '@/utils/auth';
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export default {
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props: {
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value: [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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//图片尺寸限制
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fileWidth: {
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type: Number,
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default: 0,
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},
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fileHeight: {
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type: Number,
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default: 0,
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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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//是否长方形
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isRectangle: {
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type: Boolean,
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default: false,
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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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},
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data() {
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return {
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dialogImageUrl: '',
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dialogVisible: false,
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hideUpload: false,
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baseUrl: process.env.VUE_APP_BASE_API,
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uploadImgUrl: process.env.VUE_APP_BASE_API + '/common/upload', // 上传的图片服务器地址
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headers: {
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Authorization: 'Bearer ' + getToken(),
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},
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fileList: [],
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};
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},
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watch: {
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value: {
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handler(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 : this.value.split(',');
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// 然后将数组转为对象数组
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this.fileList = list.map((item) => {
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if (typeof item === 'string') {
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if (item.indexOf(this.baseUrl) === -1) {
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item = { name: this.baseUrl + item, url: this.baseUrl + item };
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} else {
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item = { name: item, url: item };
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}
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}
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return item;
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});
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} else {
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this.fileList = [];
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return [];
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}
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},
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deep: true,
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immediate: true,
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},
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},
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computed: {
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// 是否显示提示
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showTip() {
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return this.isShowTip && (this.fileType || this.fileSize);
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},
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},
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methods: {
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// 删除图片
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handleRemove(file, fileList) {
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const findex = this.fileList.map((f) => f.name).indexOf(file.name);
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if (findex > -1) {
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this.fileList.splice(findex, 1);
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this.$emit('input', this.listToString(this.fileList));
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this.$emit('change', this.listToString(this.fileList));
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}
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},
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// 上传成功回调
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handleUploadSuccess(res) {
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this.fileList.push({
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name: res.fileName,
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url: process.env.VUE_APP_BASE_API + res.fileName,
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});
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this.$emit('input', this.listToString(this.fileList));
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this.$emit('change', this.listToString(this.fileList));
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this.loading.close();
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},
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// 上传前loading加载
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async handleBeforeUpload(file) {
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let isImg = false;
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if (this.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 = this.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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this.$message.error(`文件格式不正确, 请上传${this.fileType.join('/')}图片格式文件!`);
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return Promise.reject();
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}
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if (this.fileSize) {
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const isLt = file.size / 1024 / 1024 < this.fileSize;
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if (!isLt) {
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this.$message.error(`上传头像图片大小不能超过 ${this.fileSize} MB!`);
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return Promise.reject();
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}
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}
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if (this.fileWidth || this.fileHeight) {
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const isValidSize = await this.checkImageSize(file, this.fileWidth, this.fileHeight);
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if (!isValidSize) {
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this.$message.error(
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`上传图片不符合要求，尺寸要小于:宽${this.fileWidth ? this.fileWidth + 'px' : '不限制'},高${this.fileHeight ? this.fileHeight + 'px' : '不限制'}`
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);
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return Promise.reject();
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}
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}
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this.loading = this.$loading({
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lock: true,
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text: '上传中',
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background: 'rgba(0, 0, 0, 0.7)',
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});
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},
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// 文件个数超出
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handleExceed() {
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this.$message.error(`上传文件数量不能超过 ${this.limit} 个!`);
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},
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// 上传失败
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handleUploadError() {
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this.$message({
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type: 'error',
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message: '上传失败',
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});
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this.loading.close();
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},
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// 预览
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handlePictureCardPreview(file) {
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this.dialogImageUrl = file.url;
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this.dialogVisible = true;
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},
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// 对象转成指定字符串分隔
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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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strs += list[i].url.replace(this.baseUrl, '') + separator;
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}
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return strs != '' ? strs.substr(0, strs.length - 1) : '';
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},
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//判断图片尺寸,TODO:需要修改成Promise处理
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checkImageSize(file, width, height) {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.readAsDataURL(file);
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reader.onload = (event) => {
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const image = new Image();
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image.src = event.target.result;
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image.onload = () => {
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const imageWidth = image.width;
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const imageHeight = image.height;
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console.log(imageWidth, imageHeight);
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let isValidSize = true;
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if (height !== 0 && imageHeight > height) {
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isValidSize = false;
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}
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if (width !== 0 && imageWidth > width) {
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isValidSize = false;
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}
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resolve(isValidSize);
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};
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image.onerror = () => {
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reject(new Error('Failed to load image'));
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};
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};
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reader.onerror = () => {
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reject(new Error('Failed to read file'));
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};
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});
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},
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},
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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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::v-deep.hide .el-upload--picture-card {
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display: none;
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}
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// 去掉动画效果
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::v-deep .el-list-enter-active,
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::v-deep .el-list-leave-active {
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transition: all 0s;
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}
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::v-deep .el-list-enter,
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.el-list-leave-active {
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opacity: 0;
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transform: translateY(0);
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}
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.rectangle ::v-deep {
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.el-upload {
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height: 100px;
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line-height: 100px;
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}
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.el-icon-plus::before {
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font-size: 18px;
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}
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.el-upload-list__item {
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height: 100px;
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}
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}
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</style>
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