Ant Design Upload 组件之阻止文件默认上传

<Form.Item label="推送人群" extra="">
    {getFieldDecorator(‘personTxt‘, {
        rules: [{ required: true, message: ‘请选择推送人群文件‘ }],
        valuePropName: ‘fileList‘,
        getValueFromEvent: this.normFile
    })(
        <Upload
            action="//upload.58cdn.com.cn/json?rand=0.1298"      //必填，上传的地址
            name="personfile"     //自行指定
            listType="file"     //指定上传的是文件
            accept=".txt"       //指定可上传的文件类型
            beforeUpload={this.beforeUpload}>
            <Button>
                <Icon type="upload" /> 选择txt文件
            </Button>
        </Upload>
    )}
</Form.Item>

beforeUpload = file => {
        let reader = new FileReader();
        reader.readAsText(file);         //读取上传文件的内容
        reader.onload = e => {
            let uids = e.target.result.split(‘\r\n‘);      //把读取到的txt文件中的uid以换行符进行分割
            return false;                //阻止上传
        };
    };