ant-design-vue/components/upload/demo/upload-manually.md

<cn>
#### 手动上传
`beforeUpload` 返回 `false` 后，手动上传文件。
</cn>

<us>
#### Upload manually
Upload files manually after `beforeUpload` returns `false`.
</us>

```tpl
<template>
  <div class="clearfix">
    <a-upload :fileList="fileList" :remove="handleRemove" :beforeUpload="beforeUpload">
      <a-button> <a-icon type="upload" /> Select File </a-button>
    </a-upload>
    <a-button
      type="primary"
      @click="handleUpload"
      :disabled="fileList.length === 0"
      :loading="uploading"
      style="margin-top: 16px"
    >
      {{uploading ? 'Uploading' : 'Start Upload' }}
    </a-button>
  </div>
</template>
<script>
  import reqwest from 'reqwest';
  export default {
    data() {
      return {
        fileList: [],
        uploading: false,
      };
    },
    methods: {
      handleRemove(file) {
        const index = this.fileList.indexOf(file);
        const newFileList = this.fileList.slice();
        newFileList.splice(index, 1);
        this.fileList = newFileList;
      },
      beforeUpload(file) {
        this.fileList = [...this.fileList, file];
        return false;
      },
      handleUpload() {
        const { fileList } = this;
        const formData = new FormData();
        fileList.forEach(file => {
          formData.append('files[]', file);
        });
        this.uploading = true;

        // You can use any AJAX library you like
        reqwest({
          url: 'https://www.mocky.io/v2/5cc8019d300000980a055e76',
          method: 'post',
          processData: false,
          data: formData,
          success: () => {
            this.fileList = [];
            this.uploading = false;
            this.$message.success('upload successfully.');
          },
          error: () => {
            this.uploading = false;
            this.$message.error('upload failed.');
          },
        });
      },
    },
  };
</script>
```