为什么我的徽标在 Flex 中没有向左移动？

Question

我正在制作一个下拉导航菜单。宽度超过 1100 像素的徽标和列表项位于 Flexbox 中，徽标位于左侧，列表位于右侧。当宽度低于 1100px 时，徽标应该保持在右侧，并且列表项会变成带有下拉列表的菜单图标。然而，徽标只是停留在中心，我无法将其移动到左侧。

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

header {
  display: flex;
  text-align: center;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 0 60px;
  background-color: #212223;
  position: relative;
}

.logo {
  float: left;
}

.logo img {
  width: 190px;
}

nav {
  float: right;
}

nav ul li {
  display: inline-block;
  padding: 5px 25px;
}

nav ul li a {
  display: inline-block;
  font-weight: bold;
  font-size: 20px;
  list-style-type: none;
}

nav ul li a:hover {
  color: rgb(174, 17, 174);
}

nav ul li a {
  text-decoration: none;
  display: inline-block;
  color: white;
  font-weight: 600;
}

.toggle-button {
  width: 35px;
  position: absolute;
  right: 80px;
  top: 35px;
  display: none;
  cursor: pointer;
}

.toggle-button span {
  display: inline-block;
  width: 100%;
  height: 2px;
  background-color: white;
  float: left;
  margin-bottom: 8px;
}

.bookatable {
  color: #fff;
  background-color: #555556;
  border-radius: 6px;
  text-transform: uppercase;
  font-weight: 600;
  font-size: 18px;
  line-height: 1;
  text-align: center;
  padding: 9px 6px 8px 8px;
  transition-duration: 0.6s;
  transition-timing-function: ease-in-out;
  letter-spacing: -.3px;
  cursor: pointer;
}

.bookatable:hover {
  cursor: pointer;
  background-color: #909092;
  color: white;
}


/* ---- BREAKPOINTS ---- */

@media (max-width: 1100px) {
  header {
    display: flex;
    flex-direction: column;
    text-align: center;
    position: relative;
    justify-content: space-between;
  }
  .toggle-button {
    display: block;
  }
  nav {
    display: none;
    width: 100%;
    border-top: 1px solid white;
    padding-top: 20px;
    margin-top: 30px;
    padding-bottom: 20px;
  }
  nav ul li {
    padding: 15px 0px;
    width: 100%;
  }
  nav ul {
    text-align: center;
  }
  nav.show {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
  }
}

<link href='https://unpkg.com/[email protected]/css/boxicons.min.css' rel='stylesheet'>


<header class="header">

  <div class="toggle-button" onclick="myFunction();">
    <span></span>
    <span></span>
    <span></span>
  </div>

  <div class="logo">
    <a href="index.html"><img src="https://i.stack.imgur.com/y0nIA.png" alt=""></a>
  </div>


  <nav id="nav">
    <ul>
      <li><a href="#">Home</a></li>
      <li><a href="#">Menu</a></li>
      <li><a href="#">About Us</a></li>
      <li><a href="#">Contact Us</a></li>
      <li><a href="#" class="bookatable">Book A Table</a></li>
    </ul>
  </nav>


</header>

<script type="text/javascript">
  function myFunction() {
    var navbar = document.getElementById('nav');
    navbar.classList.toggle('show');
  }
</script>

Answer 1

如果您在媒体查询中添加以下样式，图像将与 Flex 标头的最右侧对齐

.logo {
    align-self: flex-start;
}

或者，您可以通过将以下内容添加到媒体查询中来使用边距来完成此操作

.logo {
    margin-right: auto;
}

您生成的媒体查询将是

@media (max-width: 1100px) {
    header {
      display: flex;
      flex-direction: column;
      text-align: center;
      position: relative;
      justify-content: space-between;
    }
    .toggle-button {
      display: block;
    }
    nav {
      display: none;
      width: 100%;
      border-top: 1px solid white;
      padding-top: 20px;
      margin-top: 30px;
      padding-bottom: 20px;
    }
    nav ul li {
      padding: 15px 0px;
      width: 100%;
    }
    nav ul {
      text-align: center;
    }
    nav.show {
      display: flex;
      flex-direction: column;
      flex-wrap: nowrap;
    }
    .logo {
        margin-right: auto;
    }
}

或

@media (max-width: 1100px) {
    header {
      display: flex;
      flex-direction: column;
      text-align: center;
      position: relative;
      justify-content: space-between;
    }
    .toggle-button {
      display: block;
    }
    nav {
      display: none;
      width: 100%;
      border-top: 1px solid white;
      padding-top: 20px;
      margin-top: 30px;
      padding-bottom: 20px;
    }
    nav ul li {
      padding: 15px 0px;
      width: 100%;
    }
    nav ul {
      text-align: center;
    }
    nav.show {
      display: flex;
      flex-direction: column;
      flex-wrap: nowrap;
    }
    .logo {
        align-self: flex-start;
    }

}