因此，我尝试在我的 React 应用中使用 Material UI。我尝试使用 Material UI 版本 0.20.1 和 0.20.0，但收到此错误消息

TypeError: Object(...) is not a function

它指向此行

export default withStyles(styles)(NavBar);

我只是想创建一个导航栏，我尝试了很多方法。包括从文档中复制，但似乎不起作用。

这是整个组件

import React from 'react';
import { withStyles } from 'material-ui/styles';
import AppBar from 'material-ui/AppBar';
import Toolbar from 'material-ui/Toolbar';
import Typography from 'material-ui/styles/typography';

const styles = theme => ({
  root: {
    flexGrow: 1,
  }
});

const NavBar = (props) => {
  const { classes } = props;
  return (
    <div className={classes.root}>
      <AppBar position="static" color="default">
        <Toolbar>
          <Typography variant="title" color="inherit">
            Title
          </Typography>
        </Toolbar>
      </AppBar>
    </div>
  );
}

export default withStyles(styles)(NavBar);

以下是 app.js 中的代码

import React, { Component } from 'react';
import './App.css';
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';
import NavBar from './components/NavBar/NavBar';
import MovieList from './components/grid/MovieList'

class App extends Component {
  render() {
    return (
      <MuiThemeProvider>
        <div className="App">
          <NavBar />
          <MovieList />
        </div>
      </MuiThemeProvider>
    );
  }
}

export default App;

我有两个问题；我该如何修复它以及此错误消息是什么意思。 我知道它需要一个函数，但它想要在哪里。 感谢您的帮助。

编辑： 这是完整的错误消息

TypeError: Object(...) is not a function
./src/components/NavBar/NavBar.js            
C:/Users/Pc/Documents/projects/netflix/front_end/
src/components/NavBar/NavBar.js:28
  25 |   );
  26 | }
  27 | 
> 28 | export default withStyles(styles)(NavBar);
  29 | //export default NavBar;
  30 | 
  31 | 
View compiled
__webpack_require__
C:/Users/Pc/Documents/projects/netflix/front_end/webpack/bootstrap         

32b38f70953f3c9e4ae3:678
  675 | };
  676 | 
  677 | // Execute the module function
> 678 | modules[moduleId].call(module.exports, module, module.exports,     
hotCreateRequire(moduleId));
  679 | 
  680 | // Flag the module as loaded
  681 | module.l = true;
View compiled
fn
C:/Users/Pc/Documents/projects/netflix/front_end/webpack/bootstrap 
32b38f70953f3c9e4ae3:88
  85 |      console.warn("[HMR] unexpected require(" + request + ") from     
disposed module " + moduleId);
  86 |      hotCurrentParents = [];
  87 |  }
> 88 |  return __webpack_require__(request);
  89 | };
  90 | var ObjectFactory = function ObjectFactory(name) {
  91 |  return {
View compiled
./src/App.js
http://localhost:3000/static/js/bundle.js:52716:84
__webpack_require__
C:/Users/Pc/Documents/projects/netflix/front_end/webpack/bootstrap 
32b38f70953f3c9e4ae3:678
  675 | };
  676 | 
  677 | // Execute the module function
> 678 | modules[moduleId].call(module.exports, module, module.exports, 
hotCreateRequire(moduleId));
  679 | 
  680 | // Flag the module as loaded
  681 | module.l = true;
View compiled
fn
C:/Users/Pc/Documents/projects/netflix/front_end/webpack/bootstrap 
32b38f70953f3c9e4ae3:88
  85 |      console.warn("[HMR] unexpected require(" + request + ") from     
disposed module " + moduleId);
  86 |      hotCurrentParents = [];
  87 |  }
> 88 |  return __webpack_require__(request);
  89 | };
  90 | var ObjectFactory = function ObjectFactory(name) {
  91 |  return {
View compiled
./src/index.js
http://localhost:3000/static/js/bundle.js:53044:63
__webpack_require__
C:/Users/Pc/Documents/projects/netflix/front_end/webpack/bootstrap 
32b38f70953f3c9e4ae3:678
  675 | };
  676 | 
  677 | // Execute the module function
> 678 | modules[moduleId].call(module.exports, module, module.exports,     
hotCreateRequire(moduleId));
  679 | 
  680 | // Flag the module as loaded
  681 | module.l = true;
View compiled
fn
C:/Users/Pc/Documents/projects/netflix/front_end/webpack/bootstrap 
32b38f70953f3c9e4ae3:88
  85 |      console.warn("[HMR] unexpected require(" + request + ") from     
disposed module " + moduleId);
  86 |      hotCurrentParents = [];
  87 |  }
> 88 |  return __webpack_require__(request);
  89 | };
  90 | var ObjectFactory = function ObjectFactory(name) {
  91 |  return {
View compiled
0
http://localhost:3000/static/js/bundle.js:53275:18
__webpack_require__
C:/Users/Pc/Documents/projects/netflix/front_end/webpack/bootstrap 
32b38f70953f3c9e4ae3:678
  675 | };
  676 | 
  677 | // Execute the module function
> 678 | modules[moduleId].call(module.exports, module, module.exports, 
hotCreateRequire(moduleId));
  679 | 
  680 | // Flag the module as loaded
  681 | module.l = true;
View compiled
./node_modules/ansi-regex/index.js.module.exports
C:/Users/Pc/Documents/projects/netflix/front_end/webpack/bootstrap 
32b38f70953f3c9e4ae3:724
  721 | __webpack_require__.h = function() { return hotCurrentHash; };
  722 | 
  723 | // Load entry module and return exports
> 724 | return hotCreateRequire(0)(__webpack_require__.s = 0);
  725 | 
  726 | 
  727 | 
View compiled
(anonymous function)
http://localhost:3000/static/js/bundle.js:728:10