vue+draggable+el-upload上传图片拖拽重排方法

1.html

<el-row>
  <el-col>
    <el-form-item label="添加视频/图片" prop="device_id">
      <div class="image-upload">
        <draggable v-model="fileList" @update="dataDragEnd">
          <transition-group class="uploader">
            <div v-for="(item, index) in fileList" :key="item.url" class="upload-list">
              <img v-if="item.url" style="width:146px;height: 146px" :src="item.url" />
              <div class="icon-container">
                <span v-if="item.url" @click="handlePreviewNew(index)">
                  <i class="el-icon-zoom-in"></i>
                </span>
                <span v-if="item.url" @click="handleRemoveNew(item, index)">
                  <i class="el-icon-delete"></i>
                </span>
              </div>
            </div>
          </transition-group>
        </draggable>
        <el-upload name="image" ref="uploadFile" class="upload-demo" action="#" multiple :http-request="uolpadMorePic" :file-list="fileList" list-type="picture-card">
          <i class="el-icon-plus avatar-uploader-icon"></i>
        </el-upload>
      </div>
    </el-form-item>
  </el-col>
      <ImageViewer v-if="previewVisible" :on-close="closeViewer" :url-list="[previewPath]" style="z-index: 9999;" />
</el-row>

2.js

import draggable from 'vuedraggable';
import ImageViewer from 'element-ui/packages/image/src/image-viewer.vue';
components: { draggable, ImageViewer },
//拖拽
    //图片方法
    function uploadImage(file) {
      return new Promise(async (resolve, reject) => {
        const formData = new FormData();
        formData.append('source', file.file);
        formData.append('modular', 'sccontrol');
        const { data } = await uploadsImg(formData);
        resolve(data);
      });
    }
    const fileList = ref([]);
    async function uolpadMorePic(file) {
      const data = await uploadImage(file);
      fileList.value.push({
        name: '图片',
        url: data.url,
        uid: Math.floor(Math.random() * 100000),
      });
      fileList.value.map((item, index) => (item.sortNum = index + 1));
      Message.success('上传成功');
    }
    function handleRemoveNew(file, index) {
      fileList.value.splice(index, 1);
    }
    const previewVisible = ref(false);
    const previewPath = ref('');
    function handlePreviewNew(index) {
      previewPath.value = fileList.value[index].url;
      previewVisible.value = true;
    }
    function closeViewer() {
      previewVisible.value = false;
    }
    function dataDragEnd() {
      fileList.value.forEach((item, index) => {
        item.sortNum = index + 1;
      });
      fileList.value = fileList.value.filter(item => {
        return item.url != '';
      });
    }