1.antd Upload默认值问题
需求是这样的，后台若没有图片默认值，则只有上传按钮，且只能上传一张图片；若有默认值，则显示默认头像图片， 可删除，删除之后有且只能添加一张图片，没有删除默认图片时不能添加图片
坑爹之路漫漫-----
图为无默认值时状态
图为有默认值状态，删除后可添加图片
首先设置defaultFileList,但是defaultFileList并不会默认添加到fileList里面
<
Upload
accept
=
"image/*"
listType
=
'picture'
onRemove
=
{this
.
onRemove
}
beforeUpload
=
{this
.
beforeUpload
}
defaultFileList
=
{
fieldValue
?[{
uid:
"-1"
,
name:
`
${
item
.
fieldName
}
.png`
,
status:
'done'
,
url:
`/file-server/
${
fieldValue
}
`
,
}]:
""
}
onChange
=
{this
.
handleChange
}
>
<
Button
style
=
{
{
width:
220
}
}
disabled
=
{this
.
state
.
fileList
.
length
===
1
?
true
:
false}
onMouseEnter
=
{
(
e
)
=>this
.
handleUpload
(
fieldValue
,
e
)
}
>
<
Icon
type
=
"upload"
/>
点击上传
</
Button
>
</
Upload
>