我正在尝试重新创建material-ui网站的主题切换功能。
My Github Repo: https://github.com/jonnyg23/flask-rest-ecommerce/tree/next-app-migration
到目前为止，我注意到material-ui的网站使用一个名为paletteType的cookie来存储客户端的主题选择。我明白应该使用上下文提供程序来设置cookie，但是，我的nav-bar实现在第二次单击主题切换按钮后更改主题有问题。
任何帮助都将非常感激，谢谢。
CustomThemeProvider.js:
import React, { createContext, useState } from "react";
import { ThemeProvider } from "@material-ui/core/styles";
import getTheme from "../themes";
import Cookie from "js-cookie";
export const CustomThemeContext = createContext({
// Set the default theme and setter.
appTheme: "light",
setTheme: null,
});
const CustomThemeProvider = ({ children, initialAppTheme }) => {
// State to hold selected theme
const [themeName, _setThemeName] = useState(initialAppTheme);
// Retrieve theme object by theme name
const theme = getTheme(themeName);
// Wrap setThemeName to store new theme names as cookie.
const setThemeName = (name) => {
// console.log("CustomThemeProvider, SetThemeName", name);
Cookie.set("appTheme", name);
_setThemeName(name);
};
const contextValue = {
appTheme: themeName,
setTheme: setThemeName,
};
return (
<CustomThemeContext.Provider value={contextValue}>
<ThemeProvider theme={theme}>{children}</ThemeProvider>
</CustomThemeContext.Provider>
);
};
export default CustomThemeProvider;
_app.js:
import "../styles/globals.css";
import React, { useContext, useEffect } from "react";
import PropTypes from "prop-types";
import { useAuth0 } from "@auth0/auth0-react";
import Head from "next/head";
import { Provider as NextAuthProvider } from "next-auth/client";
import { makeStyles } from "@material-ui/core/styles";
import CssBaseline from "@material-ui/core/CssBaseline";
import Auth0ProviderWithHistory from "../auth/auth0-provider-with-history";
import CustomThemeProvider, {
CustomThemeContext,
} from "../context/CustomThemeProvider";
export default function App({ Component, pageProps }) {
// const { isLoading } = useAuth0();
const ThemeContext = useContext(CustomThemeContext);
useEffect(() => {
// Remove the server-side injected CSS.
const jssStyles = document.querySelector("#jss-server-side");
if (jssStyles) {
jssStyles.parentElement.removeChild(jssStyles);
}
}, []);
return (
<React.Fragment>
<Head>
<meta
name="viewport"
content="minimum-scale=1, initial-scale=1, width=device-width"
/>
</Head>
<CustomThemeProvider initialAppTheme={ThemeContext.appTheme}>
<Auth0ProviderWithHistory>
<NextAuthProvider session={pageProps.session}>
<CssBaseline />
<Component {...pageProps} />
</NextAuthProvider>
</Auth0ProviderWithHistory>
</CustomThemeProvider>
</React.Fragment>
);
}
App.propTypes = {
Component: PropTypes.elementType.isRequired,
pageProps: PropTypes.object.isRequired,
};
ThemeModeToggle.js:
import React, { useContext } from "react";
import { IconButton } from "@material-ui/core";
import { makeStyles } from "@material-ui/core/styles";
import Brightness5TwoToneIcon from "@material-ui/icons/Brightness5TwoTone";
import Brightness2TwoToneIcon from "@material-ui/icons/Brightness2TwoTone";
import { CustomThemeContext } from "../context/CustomThemeProvider";
const useStyles = makeStyles((theme) => ({
light: {
color: theme.palette.secondary.main,
},
dark: {
color: theme.palette.secondary.main,
},
}));
const ThemeModeToggle = ({ fontSize }) => {
const classes = useStyles();
const { appTheme, setTheme } = useContext(CustomThemeContext);
// console.log("ThemeModeToggle", appTheme);
const handleThemeChange = (appTheme, setTheme) => {
if (appTheme === "light") {
setTheme("dark");
} else {
setTheme("light");
}
};
return (
<IconButton onClick={() => handleThemeChange(appTheme, setTheme)}>
{appTheme === "light" ? (
<Brightness5TwoToneIcon fontSize={fontSize} className={classes.light} />
) : (
<Brightness2TwoToneIcon fontSize={fontSize} className={classes.dark} />
)}
</IconButton>
);
};
export default ThemeModeToggle;
解决了，我找到问题了!
事实证明，我的页面组件，如StorefrontIcon和AppBar的颜色必须明确地添加className={classes.NAME}或style={{ backroundColor: theme.palette.primary.main }}为例。这两个方法都显示在我的导航栏。js文件。import React from "react";
import { AppBar, Grid, Container, Toolbar } from "@material-ui/core";
import { makeStyles, useTheme } from "@material-ui/core/styles";
import StorefrontIcon from "@material-ui/icons/Storefront";
import MainNav from "./main-nav";
import AuthNav from "./auth-nav";
import ThemeModeToggle from "./ThemeModeToggle";
import { Desktop, SmallScreen } from "./Responsive";
import HamburgerMenu from "./HamburgerMenu";
const useStyles = makeStyles((theme) => ({
root: {
[theme.breakpoints.down("sm")]: {
padding: 0,
},
},
icon: {
color: theme.palette.primary.contrastText,
},
}));
const NavBar = () => {
const classes = useStyles();
const theme = useTheme();
return (
<AppBar
position="static"
elevation={3}
style={{ backgroundColor: theme.palette.primary.main }}
>
<Toolbar>
<Container className={classes.root}>
<Grid container justify="center" alignItems="center" spacing={2}>
<Desktop>
<Grid item xs={1}>
<StorefrontIcon fontSize="large" className={classes.icon} />
</Grid>
<Grid item xs={7}>
<MainNav />
</Grid>
<Grid item xs={3}>
<AuthNav />
</Grid>
<Grid item xs={1}>
<ThemeModeToggle fontSize="large" />
</Grid>
</Desktop>
<SmallScreen>
<Grid item xs={2}>
<StorefrontIcon fontSize="medium" className={classes.icon} />
</Grid>
<Grid container item xs={10} justify="flex-end">
<HamburgerMenu />
</Grid>
</SmallScreen>
</Grid>
</Container>
</Toolbar>
</AppBar>
);
};
export default NavBar;