[Vue warn]: Invalid prop: custom validator check failed for prop "fileList".

[Vue warn]: Invalid prop: custom validator check failed for prop "items".

[Vue warn]: <transition-group> children must be keyed: <div>

 

后面两条真是无迹可寻，ctrl+F都没找出items和<transition-group>

 

 

 最后解决了第一条后面两条也没了：

<a-upload name="file" :before-upload="beforeUpload" list-type="picture" :multiple="false"
                :fileList="downloadFiles" :remove="handleDownloadFileRemove"
                :customRequest="downloadFilesCustomRequest">

 

 

 

a-upload绑定的fileList里有一个uid错误的取到了undefined导致的，取到正常的uid后就不报错了。