Question

我有用于我的React Project的material-ui的导航选项卡。选定的活动选项卡必须具有背景色，然后在不活动时切换回原始颜色。透明控件同时应用于这两个选项卡，而不是应用于选定的活动选项卡下面的代码。我只想为活动标签应用一些背景色。有解决办法吗？

这是导航标签的代码

import React from 'react';
import PropTypes from 'prop-types';
import SwipeableViews from 'react-swipeable-views';
import { makeStyles, useTheme } from '@material-ui/core/styles';
import AppBar from '@material-ui/core/AppBar';
import Tabs from '@material-ui/core/Tabs';
import Tab from '@material-ui/core/Tab';
import Typography from '@material-ui/core/Typography';
import Box from '@material-ui/core/Box';
import ForecastDays from '../forecast/index';

const TabPanel = (props) => {
  const { children, value, index, ...other } = props;

  return (
    <Typography
      component="div"
      role="tabpanel"
      hidden={value !== index}
      id={`full-width-tabpanel-${index}`}
      aria-labelledby={`full-width-tab-${index}`}
      {...other}
    >
      <Box p={3}>{children}</Box>
    </Typography>
  );
}

TabPanel.propTypes = {
  children: PropTypes.node,
  index: PropTypes.any.isRequired,
  value: PropTypes.any.isRequired,
};

const a11yProps = (index) => {
  return {
    id: `full-width-tab-${index}`,
    'aria-controls': `full-width-tabpanel-${index}`
  };
}

const useStyles = makeStyles(theme => ({
  root: {
    backgroundColor: 'none',
    width: 275,
    marginLeft:72,
    marginTop:40
  },
}));

const DailyHourly = (props) => {
  const classes = useStyles();
  const theme = useTheme();
  const [value, setValue] = React.useState(0);

  const handleChange = (event, newValue) => {
    setValue(newValue);
  };

  const handleChangeIndex = index => {
    setValue(index);
  };

  const {forecastdays, hourlyforecast} = props

  return (
    <div className={classes.root}>
      <AppBar   position="static" color="default" style={{background: 'transparent'}}>
        <Tabs
          value={value}
          onChange={handleChange}
          indicatorColor="secondary"
          textColor="primary"
          variant="fullWidth"
          aria-label="full width tabs example"
        >
          <Tab label="Daily" {...a11yProps(0)}
          />
          <Tab label="Hourly" {...a11yProps(1)}
          />
        </Tabs>
      </AppBar>
      <SwipeableViews
        axis={theme.direction === 'rtl' ? 'x-reverse' : 'x'}
        index={value}
        onChangeIndex={handleChangeIndex}
      >
        <TabPanel value={value} index={0} dir={theme.direction}>
            <ForecastDays forecastdays={forecastdays}/>
        </TabPanel>
        <TabPanel value={value} index={1} dir={theme.direction}>
            <ForecastDays hourlyforecast={hourlyforecast}/>
        </TabPanel>
      </SwipeableViews>
    </div>
  );
}

export default DailyHourly

当心图像，以供参考。任何建议，高度赞赏...在此先感谢

Answer 1

您可以基于当前的活动选项卡值添加一个类。像下面这样。如果您事先不知道选项卡的数量，则可能必须创建另一个函数。

 <Tab className={value === 0 ? classes.active : ""} label="Daily" {...a11yProps(0)}
  />
  <Tab className={value === 1 ? classes.active : ""} label="Hourly" {...a11yProps(1)}
  />

Codesandbox-https://codesandbox.io/s/pedantic-ives-t7sir

如何更改活动导航选项卡的背景颜色？

1 个答案: