Javascript 无法通过自定义react挂钩更新状态
我试图创建一个自定义挂钩,它返回一个自定义抽屉和一个按钮(用来切换抽屉的状态)。我在管理自定义钩子本身的状态 这是我的定制挂钩,用于归还抽屉和按钮Javascript 无法通过自定义react挂钩更新状态,javascript,reactjs,react-hooks,Javascript,Reactjs,React Hooks,我试图创建一个自定义挂钩,它返回一个自定义抽屉和一个按钮(用来切换抽屉的状态)。我在管理自定义钩子本身的状态 这是我的定制挂钩,用于归还抽屉和按钮 import React from "react"; import clsx from "clsx"; import { makeStyles } from "@material-ui/core/styles"; import Drawer from "@material-ui/c
import React from "react";
import clsx from "clsx";
import { makeStyles } from "@material-ui/core/styles";
import Drawer from "@material-ui/core/Drawer";
import List from "@material-ui/core/List";
import Divider from "@material-ui/core/Divider";
import ListItem from "@material-ui/core/ListItem";
import ListItemIcon from "@material-ui/core/ListItemIcon";
import ListItemText from "@material-ui/core/ListItemText";
import InboxIcon from "@material-ui/icons/MoveToInbox";
import MailIcon from "@material-ui/icons/Mail";
import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
import { faBars } from "@fortawesome/free-solid-svg-icons";
import { Button } from "@material-ui/core";
const useStyles = makeStyles({
list: {
width: 250
},
fullList: {
width: "auto"
}
});
export default function useTemporaryDrawer(toggle) {
const classes = useStyles();
const [state, setState] = React.useState({
right: false
});
const toggleDrawer = (anchor, open) => (event) => {
if (
event.type === "keydown" &&
(event.key === "Tab" || event.key === "Shift")
) {
return;
}
alert("setting");
setState({ ...state, [anchor]: open });
};
const onButtonClick = (e) => {
toggleDrawer("right", true)(e);
};
const Toggler = (
<Button
style={{
marginTop: "10px"
}}
onClick={onButtonClick}
startIcon={<FontAwesomeIcon icon={faBars} style={{ color: "#fff" }} />}
></Button>
);
const list = (anchor) => (
<div
className={clsx(classes.list, {
[classes.fullList]: anchor === "top" || anchor === "bottom"
})}
role="presentation"
onClick={toggleDrawer(anchor, false)}
onKeyDown={toggleDrawer(anchor, false)}
>
<List>
{["Inbox", "Starred", "Send email", "Drafts"].map((text, index) => (
<ListItem button key={text}>
<ListItemIcon>
{index % 2 === 0 ? <InboxIcon /> : <MailIcon />}
</ListItemIcon>
<ListItemText primary={text} />
</ListItem>
))}
</List>
<Divider />
<List>
{["All mail", "Trash", "Spam"].map((text, index) => (
<ListItem button key={text}>
<ListItemIcon>
{index % 2 === 0 ? <InboxIcon /> : <MailIcon />}
</ListItemIcon>
<ListItemText primary={text} />
</ListItem>
))}
</List>
</div>
);
const CustomDrawer = (
<Drawer
anchor={"right"}
open={state["right"]}
onClose={toggleDrawer("right", false)}
>
{list("right")}
</Drawer>
);
return {
CustomDrawer,
setState,
state,
Toggler
};
}
从“React”导入React;
从“clsx”导入clsx;
从“@material ui/core/styles”导入{makeStyles}”;
从“@物料界面/核心/抽屉”导入抽屉;
从“@material ui/core/List”导入列表;
从“@material ui/core/Divider”导入分隔器;
从“@material ui/core/ListItem”导入ListItem;
从“@material ui/core/ListItemIcon”导入ListItemIcon;
从“@material ui/core/ListItemText”导入ListItemText;
从“@material ui/icons/MoveToInbox”导入收件箱;
从“@material ui/icons/Mail”导入MailIcon;
从“@fortawesome/react fontawesome”导入{FontAwesomeIcon}”;
从“@fortawesome/free solid svg icons”导入{faBars}”;
从“@material ui/core”导入{Button}”;
const useStyles=makeStyles({
名单:{
宽度:250
},
完整列表:{
宽度:“自动”
}
});
导出默认功能useTemporaryDrawer(切换){
const classes=useStyles();
常量[状态,设置状态]=React.useState({
右:错
});
const-toggleDrawer=(锚定,打开)=>(事件)=>{
如果(
event.type==“keydown”&&
(event.key==“Tab”| | event.key==“Shift”)
) {
返回;
}
警报(“设置”);
setState({…状态,[锚定]:打开});
};
const onButtonClick=(e)=>{
切换抽屉(“右”,正确)(e);
};
常数切换器=(
);
常量列表=(锚定)=>(
{[“收件箱”、“星号”、“发送电子邮件”、“草稿”].map((文本、索引)=>(
{索引%2==0?:}
))}
{[“所有邮件”、“垃圾”、“垃圾邮件”].map((文本、索引)=>(
{索引%2==0?:}
))}
);
常数CustomDrawer=(
{list(“right”)}
);
返回{
海关发票人,
设定状态,
国家,,
扳机
};
}
然后,我试图通过我在标题中使用的切换按钮来更新状态。这是我的头球
import React from "react";
import styles from "./Header.module.css";
import useTemporaryDrawer from "../Drawer/useTemporaryDrawer";
const Header = (props) => {
const { Toggler } = useTemporaryDrawer();
return <div className={styles.headerForApp}>{Toggler}</div>;
};
export default Header;
从“React”导入React;
从“/Header.module.css”导入样式;
从“./Drawer/useTemporaryDrawer”导入useTemporaryDrawer;
常数头=(道具)=>{
const{Toggler}=useTemporaryDrawer();
返回{Toggler};
};
导出默认标题;
当我按下切换按钮时,它会更新状态,但不会更新抽屉的打开属性。简言之,我无法通过切换按钮打开抽屉。请帮忙
这是沙箱
如果我有两个组件:A和B,并且每个组件都有
setState
钩子来更新变量state
,你不会期望A中的setState('A')
对B中的state
产生任何影响,对吗?然后创建两个组件,每个组件都具有独立的状态,并希望这些状态以某种方式共享。标题中的切换更改了标题的状态,并且仪表板中的抽屉无法看到这些更改。作为一个选项,您可以将切换器作为道具传递到标题
<Header Toggler={Toggler} />
const Header = (props) => {
return <div className={styles.headerForApp}>{props.Toggler}</div>;
};
常数头=(道具)=>{
返回{props.Toggler};
};