MUI createTheme 未正确将主题传递给 MUI 组件

Question

我使用 MUI 在我的 React.JS 项目的索引中创建了一个主题。当我尝试将我的风格应用到我的Appbar 时，主题没有正确修改菜单按钮或菜单本身。该按钮看起来是通用默认值，当它应该与 Appbar 本身的颜色匹配时，菜单保持白色。

我的 index.tsx 看起来是这样的：

import React from "react";
import ReactDOM from "react-dom";
import AppbarTop from "./AppbarTop";
import { Router } from "react-router";
import { createBrowserHistory } from "history";
import AdapterDateFns from "@mui/lab/AdapterDateFns";
import { LocalizationProvider } from "@mui/lab";
import { createTheme } from "@mui/material";
import { ThemeProvider } from "@mui/styles";
import { StyledEngineProvider } from "@mui/material/styles";

const customHistory = createBrowserHistory();

const theme = createTheme({
  palette: {
    primary: {
      main: "#242526"
    },
    secondary: {
      main: "#d975d0"
    },
    text: {
      primary: "#E4E6EB",
      secondary: "#B0B3B8"
    },
    background: {
      default: "#242526",
      paper: "#242526"
    }
  }
});

ReactDOM.render(
  <React.StrictMode>
    <LocalizationProvider dateAdapter={AdapterDateFns}>
      <Router history={customHistory}>
        <ThemeProvider theme={theme}>
          <StyledEngineProvider injectFirst>
            <AppbarTop />
          </StyledEngineProvider>
        </ThemeProvider>
      </Router>
    </LocalizationProvider>
  </React.StrictMode>,
  document.getElementById("root")
);

我的 appbar.tsx 看起来像这样：

import React from "react";
import {
  AppBar,
  Box,
  Button,
  Container,
  Menu,
  MenuItem,
  Toolbar
} from "@mui/material";
import HomeIcon from "@mui/icons-material/Home";
import { makeStyles } from "@mui/styles";

const useStyles = makeStyles((theme?: any) => ({
  appBar: {
    background: theme.palette.primary.main,
    height: "60px",
    position: "relative"
  }
}));

const AppbarTop: React.FC<{ [key: string]: any }> = () => {
  const classes = useStyles();

  const [anchorEl, setAnchorEl] = React.useState<any>(null);
  const open = Boolean(anchorEl);
  const handleClick = (event: React.MouseEvent<HTMLButtonElement>) => {
    setAnchorEl(event.currentTarget);
  };
  const handleClose = () => {
    setAnchorEl(null);
  };

  return (
    <>
      <AppBar position="static" className={classes.appBar}>
        <Toolbar>
          <Button
            id="basic-button"
            aria-controls="basic-menu"
            aria-haspopup="true"
            aria-expanded={open ? "true" : undefined}
            onClick={handleClick}
          >
            Dashboard
          </Button>
          <Menu
            id="basic-menu"
            anchorEl={anchorEl}
            open={open}
            onClose={handleClose}
            MenuListProps={{
              "aria-labelledby": "basic-button"
            }}
          >
            <MenuItem onClick={handleClose}>
              <HomeIcon />{" "}
            </MenuItem>
          </Menu>
          {/*test speed dial*/}

          <Container maxWidth="sm"></Container>
          <Box></Box>
        </Toolbar>
      </AppBar>
    </>
  );
};

export default AppbarTop;

谁能解释一下我错过了什么？

Answer 1

改变这一行：

import { ThemeProvider } from "@mui/styles";

收件人：

import { ThemeProvider } from "@mui/material/styles";

原因：这里有2个ThemeProviders

• The one from @mui/styles：这个ThemeProvider 确实通过上下文发送Theme 对象，它工作正常，您仍然可以使用useTheme 挂钩访问它：

const theme = useTheme();

return <Box sx={{ width: 10, height: 10, bgcolor: theme.palette.primary.main }} />

• 来自@mui/material/styles的那个：这个ThemeProvider是上面的一个包装器，但它也将主题注入到StyledEngineThemeContext.Provider，它允许你在使用MUI API时访问主题（@ 987654339@道具/styled())。这里的问题是 Button 和 Menu 组件 uses styled() API 在底层，所以 ThemeProvider 需要从 @mui/material/styles 导入才能使其工作。

return <Box sx={{ width: 10, height: 10, bgcolor: 'primary.main' }} />

相关答案

• Difference between @mui/material/styles and @mui/styles?
• Cannot use palette colors from MUI theme
• MUI - makeStyles - Cannot read properties of undefined
• Material UI Dark Mode