如何在反应中使用单一方法扩展/减少仅一个ListItem [英] How to expand more/less only one ListItem using single method in react

问题描述

我在此链接上找到了我需要的

I found what i need on this link https://material-ui.com/components/lists/#simple-list using material-ui. On this link there is chapter "Nested list items". This chapter have only one nested list item with method for expand more/less. I have two nested items in my sidebar. Both of them call a method handleClick for expand more/less options. I want to expand only one (clicked) nested item per click. I also want to expand less on previous item. Here is my sidebar:

import React from "react";
import { makeStyles } from "@material-ui/core/styles";
import Drawer from "@material-ui/core/Drawer";
import Toolbar from "@material-ui/core/Toolbar";
import List from "@material-ui/core/List";
import ListItem from "@material-ui/core/ListItem";
import ListItemIcon from "@material-ui/core/ListItemIcon";
import ListItemText from "@material-ui/core/ListItemText";
import Collapse from "@material-ui/core/Collapse";
import ExpandLess from "@material-ui/icons/ExpandLess";
import ExpandMore from "@material-ui/icons/ExpandMore";

import HomeIcon from '@material-ui/icons/Home';
import SupervisorAccountIcon from '@material-ui/icons/SupervisorAccount';
import AccessibilityNewIcon from '@material-ui/icons/AccessibilityNew';
import VisibilityIcon from '@material-ui/icons/Visibility';
import AddIcon from '@material-ui/icons/Add';

const drawerWidth = 260;

const useStyles = makeStyles((theme) => ({
  drawer: {
    width: drawerWidth,
    flexShrink: 0,
  },
  drawerPaper: {
    width: drawerWidth,
  },
  drawerContainer: {
    overflow: "auto",
  },
  root: {
    width: "100%",
    maxWidth: 360,
    backgroundColor: theme.palette.background.paper,
  },
  nested: {
    paddingLeft: theme.spacing(4),
  },
}));

export default function SideBar() {
  const classes = useStyles();
  const [open, setOpen] = React.useState(true);

const handleClick = () => {
  setOpen(!open);
};

return (
  <Drawer
    className={classes.drawer}
    variant="permanent"
    classes={{
      paper: classes.drawerPaper,
    }}
  >
    <Toolbar />
    <div className={classes.drawerContainer}>
      <List
        component="nav"
        aria-labelledby="nested-list-subheader"
        className={classes.root}
      >
        <ListItem button>
          <ListItemIcon>
            <HomeIcon />
          </ListItemIcon>
          <ListItemText primary="Home" />
        </ListItem>
        <ListItem button onClick={handleClick}>
          <ListItemIcon>
            <SupervisorAccountIcon />
          </ListItemIcon>
          <ListItemText primary="Administrators" />
          {open ? <ExpandLess /> : <ExpandMore />}
        </ListItem>
        <Collapse in={open} timeout="auto" unmountOnExit>
          <List component="div" disablePadding>
            <ListItem button className={classes.nested}>
              <ListItemIcon>
                <VisibilityIcon />
              </ListItemIcon>
              <ListItemText primary="View" />
            </ListItem>
            <ListItem button className={classes.nested}>
              <ListItemIcon>
                <AddIcon />
              </ListItemIcon>
              <ListItemText primary="Add administrator" />
            </ListItem>
          </List>
        </Collapse>
        <ListItem button onClick={handleClick}>
          <ListItemIcon>
            <AccessibilityNewIcon />
          </ListItemIcon>
          <ListItemText primary="Trainers" />
          {open ? <ExpandLess /> : <ExpandMore />}
        </ListItem>
        <Collapse in={open} timeout="auto" unmountOnExit>
          <List component="div" disablePadding>
            <ListItem button className={classes.nested}>
              <ListItemIcon>
                <VisibilityIcon />
              </ListItemIcon>
              <ListItemText primary="View" />
            </ListItem>
            <ListItem button className={classes.nested}>
              <ListItemIcon>
                <AddIcon />
              </ListItemIcon>
              <ListItemText primary="Add trainer" />
            </ListItem>
          </List>
        </Collapse>
      </List>
    </div>
  </Drawer>
);
}

Any idea how to do this?

解决方案

You can use a render prop. Here's a CodeSandbox.

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