【vue+antd】上传图片 - 使用customRequest方法自定义上传

基于antdv 1.7版本，实现图片墙UI，图片的base64格式上传、删除、回显及进度条等功能。

1.HTML

<div class="form-item-content" style="width: 560px;">
    <div class="clearfix" style="width:100%">
        <a-upload :file-list="fileList" list-type="picture-card" accept="image/*"
            :custom-request="customRequest" @preview="onPreview" :remove="onImgRemove"
            :multiple="false">
            <div v-if="fileList.length < 10">
                <a-icon type="plus" />
                <div class="ant-upload-text">上传</div>
            </div>
        </a-upload>
        <a-modal :visible="previewVisible" :footer="null" @cancel="onCancel">
            <img alt="example" style="width: 100%" :src="previewImage">
        </a-modal>
    </div>
</div>

2.JS

<script>
export default {
  data() {
    return {
      previewVisible: false,
      previewImage: '',
      fileList: [],
    };
  },
  methods: {
    getBase64(file) {
        return new Promise((resolve, reject) => {
            const reader = new FileReader();
            reader.readAsDataURL(file);
            reader.onload = () => resolve(reader.result);
            reader.onerror = error => reject(error);
        });
    },
    getImgWH(url) {
        return new Promise((resolve, reject) => {
            const img = new Image();
            img.