我想material-ui select返回一个数组，但只选择单个值

Question

我想返回一个数组而不是字符串但是当我尝试在renderValue中这样做时它仍然返回字符串

<Select
id="demo-mutiple-checkbox"
value={formData.sector}
onOpen={(e) => setAnchorEl(e.currentTarget)}
onChange={(e) => handleFormChange("sector", e)}
input={<Input placeholder="Sector" />}
renderValue={(selected) => {
return (selected as string[]);
}}
MenuProps={{
anchorEl: anchorEl,
PaperProps: {
style: {
maxHeight: ITEM_HEIGHT * 4.5 + ITEM_PADDING_TOP,
marginTop: 4,
},
},
MenuListProps: {
style: {
padding: 0,
},
},
anchorOrigin: {
vertical: "bottom",
horizontal: "left",
},
getContentAnchorEl: null,
}}
>

Answer 1

renderValue={(selected) => {
return ([selected]);
}}