Material Ui React - 导航栏未将框右对齐

Question

我有一个导航栏，可以将所有页面选项右对齐。但是，它不会这样做。整个工具栏是 flexbox，我试过使用 alignSelf: end，但这只会稍微向下移动文本。

我不确定为什么会这样，因为我为工具栏选择的方向是行而不是列。

我试过删除屏幕调整大小时出现的选项，但这也不起作用。

下面是问题所在的代码。我还评论了哪个盒子导致了这个问题。（评论标记为 ISSUE）

          {/* Issue */}
      {/* ABOUT, PROJECTS, CONTACT - full screen */}
      <Box sx={{ display: { xs: 'none', md: 'flex' },  alignItems: "flex-end" }}>
        {pages.map((page) => (
          <Button
            key={page}
            onClick={handleCloseNavMenu}
            sx={{ my: 2, color: 'black', display: 'block' }}
          >
            {page}
          </Button>
        ))}
      </Box>

完整代码：

import * as React from 'react';
import AppBar from '@mui/material/AppBar';
import Box from '@mui/material/Box';
import Toolbar from '@mui/material/Toolbar';
import IconButton from '@mui/material/IconButton';
import Typography from '@mui/material/Typography';
import Menu from '@mui/material/Menu';
import MenuIcon from '@mui/icons-material/Menu';
import Container from '@mui/material/Container';
import Button from '@mui/material/Button';
import MenuItem from '@mui/material/MenuItem';

const pages = ['About', 'Projects', 'Contact'];

const NavBar = () => {
  const [anchorElNav, setAnchorElNav] = React.useState(null);

  const handleOpenNavMenu = (event) => {
    setAnchorElNav(event.currentTarget);
  };

  const handleCloseNavMenu = () => {
    setAnchorElNav(null);
  };


  return (
    <AppBar position="static" sx={{backgroundColor: "blue"}}>
      <Container maxWidth="xl">
        <Toolbar disableGutters sx={{display: { xs: 'flex' }, flexDirection: "row", backgroundColor: "blue"}}>

          {/* LOGO */}
          <Typography
            variant="h2"
            noWrap
            component="div"
            color="black"
            sx={{ mr: 2, display: { xs: 'none', md: 'flex' } }}
          >
            name
          </Typography>

          {/*Drawer - small screen  */}
          <Box sx={{ flexGrow: 1, display: { xs: 'flex', md: 'none'} }}>

            {/* Menu triple bar */}
            <IconButton
              size="large"
              aria-label="account of current user"
              aria-controls="menu-appbar"
              aria-haspopup="true"
              onClick={handleOpenNavMenu}
              color="inherit"
            >
              <MenuIcon />
            </IconButton>

            {/* ABOUT, PROJECTS, CONTACT - small screen */}
            <Menu
              id="menu-appbar"
              anchorEl={anchorElNav}
              anchorOrigin={{
                vertical: 'bottom',
                horizontal: 'left',
              }}
              keepMounted
              transformOrigin={{
                vertical: 'top',
                horizontal: 'left',
              }}
              open={Boolean(anchorElNav)}
              onClose={handleCloseNavMenu}
              sx={{
                display: { xs: 'block', md: 'none' },
              }}
            >
              {pages.map((page) => (
                <MenuItem key={page} onClick={handleCloseNavMenu}>
                  <Typography textAlign="center">{page}</Typography>
                </MenuItem>
              ))}
            </Menu>
          </Box>

          {/* LOGO - small screen */}
          <Typography
            variant="h6"
            noWrap
            component="div"
            color="black"
            sx={{ flexGrow: 1, display: { xs: 'flex', md: 'none' } }}
          >
            name
          </Typography>

          {/* Issue */}
          {/* ABOUT, PROJECTS, CONTACT - full screen */}
          <Box sx={{ display: { xs: 'none', md: 'flex' },  alignItems: "flex-end" }}>
            {pages.map((page) => (
              <Button
                key={page}
                onClick={handleCloseNavMenu}
                sx={{ my: 2, color: 'black', display: 'block' }}
              >
                {page}
              </Button>
            ))}
          </Box>

        </Toolbar>
      </Container>
    </AppBar>
  );
};
export default NavBar;

Answer 1

您需要使用 justifyContent 或 justifySelf 在主轴上移动内容，并使用 alignContent 和 alignSelf 在交叉轴上移动内容，您使用了错误的 CSS 属性因为主轴在这种情况是行。了解更多信息。关于 flexbox 轴请参考 this link
让我为您简化一下。
解决方法相当简单。 parent Container有两个children "Logo/Typography" 和"Box"，你想让"Box" child移动到container的末端，你只需要给出 parent (Toolbar) justifyContent: space-between 属性以确保两个 children 在两端。

玩转代码 here

<AppBar position="static" sx={{ backgroundColor: "blue" }}>
      <Container maxWidth="xl">
        <Toolbar
          disableGutters
          sx={{
            display: { xs: "flex" },
            flexDirection: "row",
            backgroundColor: "blue",
            justifyContent: "space-between"
          }}
        >
          {/* LOGO */}
          <Typography
            variant="h2"
            noWrap
            component="div"
            color="black"
            sx={{ mr: 2, display: { xs: "none", md: "flex" } }}
          >
            name
          </Typography>

          {/*Drawer - small screen  */}
          <Box sx={{ flexGrow: 1, display: { xs: "flex", md: "none" } }}>
            {/* Menu triple bar */}
            <IconButton
              size="large"
              aria-label="account of current user"
              aria-controls="menu-appbar"
              aria-haspopup="true"
              onClick={handleOpenNavMenu}
              color="inherit"
            >
              <MenuIcon />
            </IconButton>

            {/* ABOUT, PROJECTS, CONTACT - small screen */}
            <Menu
              id="menu-appbar"
              anchorEl={anchorElNav}
              anchorOrigin={{
                vertical: "bottom",
                horizontal: "left"
              }}
              keepMounted
              transformOrigin={{
                vertical: "top",
                horizontal: "left"
              }}
              open={Boolean(anchorElNav)}
              onClose={handleCloseNavMenu}
              sx={{
                display: { xs: "block", md: "none" }
              }}
            >
              {pages.map((page) => (
                <MenuItem key={page} onClick={handleCloseNavMenu}>
                  <Typography textAlign="center">{page}</Typography>
                </MenuItem>
              ))}
            </Menu>
          </Box>

          {/* LOGO - small screen */}
          <Typography
            variant="h6"
            noWrap
            component="div"
            color="black"
            sx={{ flexGrow: 1, display: { xs: "flex", md: "none" } }}
          >
            name
          </Typography>

          {/* Issue */}
          {/* ABOUT, PROJECTS, CONTACT - full screen */}
          <Box
            sx={{
              display: { xs: "none", md: "flex" }
            }}
          >
            {pages.map((page) => (
              <Button
                key={page}
                onClick={handleCloseNavMenu}
                sx={{ my: 2, color: "black", display: "block" }}
              >
                {page}
              </Button>
            ))}
          </Box>
        </Toolbar>
      </Container>
    </AppBar>

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