React对话框已关闭问题

Question

我想使用材质UI的对话框。我正在使用另一个组件从右侧菜单（侧栏->用户注册）浏览该对话框。我只想在当前页面首页或关于我们的页面上打开该对话框。这是一个用户注册对话框。你能帮上忙吗？

[当我尝试打开用户注册对话框时，无法在当前页面中打开对话框，这就是为什么我为对话框组件创建了单独的组件的原因。

选择侧面菜单选项时，我想打开该对话框。该对话框应在当前页面中打开。

这是代码沙箱链接。 https://codesandbox.io/s/immutable-sound-ggj4w

App js

import React from "react";
import "./styles.css";
import { BrowserRouter, Route, Switch } from "react-router-dom";
import Home from "./home";
import About from "./about";
import Dialog from "./dialog";
import SideMenu from "./sidemu";
export default function App() {
  return (
    <div className="App">
      <BrowserRouter>

      <SideMenu />
        {/* <Switch> */}
          <Route exact path="/" component={Home} />
          <Route exact path="/about" component={About} />
          <Route exact path="/sidemenu" component={SideMenu} />
          <Route exact path="/dialog" component={Dialog} />
        {/* </Switch> */}
      </BrowserRouter>
      {/* <h1>Hello CodeSandbox</h1>
      <h2>Start editing to see some magic happen!</h2> */}
    </div>
  );
}

家庭js

import React, { Component } from "react";

class Home extends Component {
  render() {
    return (
      <div>
        <div>Home</div>
      </div>
    );
  }
}

export default Home;

关于我们

import React, { Component } from "react";

class Home extends Component {
  render() {
    return (
      <div>
        <div>about us</div>
      </div>
    );
  }
}

export default Home;

dialog js

import React from 'react';
import Button from '@material-ui/core/Button';
import Dialog from '@material-ui/core/Dialog';
import DialogActions from '@material-ui/core/DialogActions';
import DialogContent from '@material-ui/core/DialogContent';
import DialogContentText from '@material-ui/core/DialogContentText';
import DialogTitle from '@material-ui/core/DialogTitle';

export default function AlertDialog() {
  const [open, setOpen] = React.useState(false);

  const handleClickOpen = () => {
    setOpen(true);
  };

  const handleClose = () => {
    setOpen(false);
  };

  return (
    <div>
      <Button variant="outlined" color="primary" onClick={handleClickOpen}>
        Open alert dialog
      </Button>
      <Dialog
        open={true}
        onClose={handleClose}
        aria-labelledby="alert-dialog-title"
        aria-describedby="alert-dialog-description"
      >
        <DialogTitle id="alert-dialog-title">{"Use Google's location service?"}</DialogTitle>
        <DialogContent>
          <DialogContentText id="alert-dialog-description">
            Let Google help apps determine location. This means sending anonymous location data to
            Google, even when no apps are running.
          </DialogContentText>
        </DialogContent>
        <DialogActions>
          <Button onClick={handleClose} color="primary">
            Disagree
          </Button>
          <Button onClick={handleClose} color="primary" autoFocus>
            Agree
          </Button>
        </DialogActions>
      </Dialog>
    </div>
  );
}

sidemenu js

import React from 'react';
import './styles.css';
import { Link } from 'react-router-dom';
import { makeStyles } from '@material-ui/core/styles';
import Drawer from '@material-ui/core/Drawer';
import { List, ListItemIcon, ListItem, ListItemText } from '@material-ui/core';
import MenuRoundedIcon from '@material-ui/icons/MenuRounded';
import HomeRoundedIcon from '@material-ui/icons/HomeRounded';
import MenuBookRoundedIcon from '@material-ui/icons/MenuBookRounded';

const useStyles = makeStyles({
  list: {
    width: 250,
  },
  fullList: {
    width: 'auto',
  },
});

export default function TemporaryDrawer() {
  const classes = useStyles();
  const [state, setState] = React.useState({
    top: false,
    left: false,
    bottom: false,
    right: false,
  });

  const toggleDrawer = (side, open) => event => {
    if (event.type === 'keydown' && (event.key === 'Tab' || event.key === 'Shift')) {
      return;
    }

    setState({ ...state, [side]: open });
  };

  const sideList = side => (
    <div
      className={classes.list}
      role="presentation"
      onClick={toggleDrawer(side, false)}
      onKeyDown={toggleDrawer(side, false)}
    >
      <List>
        <Link className="right-menu-data" to="/">
          <ListItem button>
            <ListItemIcon>
              <HomeRoundedIcon />
            </ListItemIcon>
            <ListItemText>Home</ListItemText>
          </ListItem>
        </Link>
        <Link className="right-menu-data" to="/about"><ListItem button>
          <ListItemIcon>
            <MenuBookRoundedIcon />
          </ListItemIcon>
          <ListItemText>About us</ListItemText>
        </ListItem>
        </Link>
        <Link className="right-menu-data" to="/dialog"><ListItem button>
          <ListItemIcon>
            <MenuBookRoundedIcon />
          </ListItemIcon>
          <ListItemText>User Registration</ListItemText>
        </ListItem>
        </Link>
      </List>


    </div>
  );


  return (
    <div>
      <MenuRoundedIcon className="careerpedia-menu-bars" onClick={toggleDrawer('right', true)} />
      <Drawer anchor="right" open={state.right} onClose={toggleDrawer('right', false)}>
        {sideList('right')}
      </Drawer>
    </div>
  );
}

Answer 1

一种方法实现此目的是要考虑将对话框组件中的模态打开/关闭到“中央”位置的逻辑，最好是在应用程序中，但在路由器外部。这允许通过可在应用程序周围传递的回调从单个位置打开/关闭对话框，并且未连接到任何特定路径您的应用程序处于打开状态。

代码的快速重构：

dialog.js

const AlertDialog = ({ open, onAgree, onClose, onDisagree }) => (
  <Dialog
    open={open}
    onClose={onClose}
    aria-labelledby="alert-dialog-title"
    aria-describedby="alert-dialog-description"
  >
    <DialogTitle id="alert-dialog-title">
      {"Use Google's location service?"}
    </DialogTitle>
    <DialogContent>
      <DialogContentText id="alert-dialog-description">
        Let Google help apps determine location. This means sending anonymous
        location data to Google, even when no apps are running.
      </DialogContentText>
    </DialogContent>
    <DialogActions>
      <Button onClick={onDisagree} color="primary">
        Disagree
      </Button>
      <Button onClick={onAgree} color="primary" autoFocus>
        Agree
      </Button>
    </DialogActions>
  </Dialog>
);

App.js

export default function App() {
  const [open, setOpen] = useState(false);

  const openDialog = () => setOpen(true);
  const closeDialog = () => setOpen(false);

  const onAgreeHandler = () => {
    closeDialog();
    alert("AGREED");
  };
  const onDisgreeHandler = () => {
    closeDialog();
    alert("DISAGREED");
  };
  const onCloseHandler = (event, reason) => {
    closeDialog();
    alert(`Dialog closed. Reason: ${reason}`);
  };

  return (
    <div className="App">
      <BrowserRouter>
        <SideMenu openDialog={openDialog} /> // Pass dialog open callback to sidemenu
        <Route exact path="/" component={Home} />
        <Route exact path="/about" component={About} />
        <Route exact path="/dialog" component={Dialog} />
      </BrowserRouter>

      <Button variant="outlined" color="primary" onClick={openDialog}>
        Open alert dialog test
      </Button>

      <Dialog
        open={open}
        onAgree={onAgreeHandler}
        onClose={onCloseHandler}
        onDisagree={onDisgreeHandler}
      />
    </div>
  );
}

sidemu.js

export default function TemporaryDrawer({ openDialog }) { // Accept openDialog callback

  ...
    { /* Add new menu list item (not in a Link!) */ }
    <ListItem button onClick={openDialog}> // Set onClick handler to openDialog callback
      <ListItemIcon>
        <MenuBookRoundedIcon />
      </ListItemIcon>
      <ListItemText>Trigger dialog?</ListItemText>
    </ListItem>

NOTE：随着您的应用程序大小/复杂度的增加，此模式可能会变得有些笨拙（如果您需要其他任何后代打开对话框），您可能希望切换为使用React上下文提供程序/ consumer专门用于对话框，或者使用状态管理系统（例如Redux），以便您可以分派简单的操作来打开/关闭它。