html - 将子菜单(下拉)方向从垂直更改为水平

Question

现在我有这样垂直方向的下拉菜单:

我想更改下拉菜单，使它们出现在水平方向，首选菜单项居中:

我正在使用 div (.dropdown, .dropdown-content)

.dropdown {
    float: left;
    overflow: hidden;
}

.dropdown .dropbtn {
    font-size: 16px;    
    outline: none;
    background-image: linear-gradient(#F1F1F1, #E5E5E5);
    font-family: inherit;
    margin: 0;
    width: 150px;
    height: 160px;
    border: 1px solid white;
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-image: linear-gradient(#F1F1F1, #E5E5E5);
    border: 1px solid white;
    width: 150px;
    height: auto;
    border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px;
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
    padding-bottom: 10px;
}

如何更改方向和对齐方式？

<div class="dropdown">
    <button class="dropbtn" data-showdiv="CO">
        <div class="titleh2">Title</div>
        <img class="orga" src="picture.png"> 
        <div class="titleh1">Name</div>
        <i class="fa fa-caret-down"></i>
    </button>
    <div class="dropdown-content">
        <a href="#" class="firstImage">
            <img class="orga" src="\untitled.png" />
        </a>
        <div class="titleh2">Title</div><br>
        <div class="titleh3">Name</div>
        <hr class="horizontal">
        <a href="#">
            <img class="orga" src="\untitled.png">
        </a>
        <div class="titleh2">Title</div><br>
        <div class="titleh3">Name</div>
        <hr class="horizontal">
        <a href="#">
            <img class="orga" src="\untitled.png">
        </a>
        <div class="titleh2">Title</div><br>
        <div class="titleh3">Name</div>
    </div>
</div> 

Answer 1

您可以使用 FlexBox 来获得想要的结果。请记住，flexbox 是全新的，在旧版浏览器中不受支持。

我做了什么:

将 dropdown-content 的显示设置更改为 display:flex; 并添加 flex-direction: row 以水平对齐它们。

然后我用一个 div 包装了所有下拉元素，以便在需要时为下拉列表的每个元素提供一些样式。

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 16px;
  outline: none;
  background-image: linear-gradient(#F1F1F1, #E5E5E5);
  font-family: inherit;
  margin: 0;
  width: 150px;
  height: 160px;
  border: 1px solid white;
  border-radius: 5px;

}

.dropdown-content {
  /*display: none; //Change this to display flex, with the flex-direction to align the items horizontally*/
  display: flex;
  flex-direction: row;
  position: absolute;
  background-image: linear-gradient(#F1F1F1, #E5E5E5);
  border: 1px solid white;
  height: auto;
  border-radius: 5px;
  padding-bottom: 10px;
}

.dropdown-content-element{
  margin: 2px 5px;
  padding: 5px;
}

<div class="dropdown">
  <button class="dropbtn" data-showdiv="CO">
        <div class="titleh2">Title</div>
        <img class="orga" src="picture.png"> 
        <div class="titleh1">Name</div>
        <i class="fa fa-caret-down"></i>
    </button>
  <div class="dropdown-content">
    <div class="dropdown-content-element">
      <a href="#" class="firstImage">
        <img class="orga" src="\untitled.png" />
      </a>
      <div class="titleh2">Title</div>
      <div class="titleh3">Name</div>
    </div>
    <div class="dropdown-content-element">
      <a href="#">
        <img class="orga" src="\untitled.png">
      </a>
      <div class="titleh2">Title</div>
      <div class="titleh3">Name</div>
    </div>
    <div class="dropdown-content-element">
      <a href="#">
        <img class="orga" src="\untitled.png">
      </a>
      <div class="titleh2">Title</div>
      <div class="titleh3">Name</div>
    </div>
  </div>
</div>

这是一个小备忘单，可以帮助您开始使用 FlexBox .

编辑: 这有效，但没有以选定的 super 菜单项为中心。但你会自己实现的，我相信你!

哦，顺便说一下:如果所有规则都相同，您可以用 border-radius: 5px; 总结您的 border-radius 规则。节省一些空间并保持更好的可读性。

编辑 2:

这里是一个使用 ul 和 li 来获得类似结果的例子。 @Moose 在他的一条评论中建议使用此方法。

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 16px;
  outline: none;
  background-image: linear-gradient(#F1F1F1, #E5E5E5);
  font-family: inherit;
  margin: 0;
  width: 150px;
  height: 160px;
  border: 1px solid white;
  border-radius: 5px;
}

.dropdown-content {
  /*display: none;*/
  position: absolute;
  background-image: linear-gradient(#F1F1F1, #E5E5E5);
  border: 1px solid white;
  height: auto;
  border-radius: 5px;
  padding-bottom: 10px;
}

.dropdown-list {
  list-style: none;
}

.dropdown-list>li {
  display: inline-block;
}

<div class="dropdown">
  <button class="dropbtn" data-showdiv="CO">
        <div class="titleh2">Title</div>
        <img class="orga" src="picture.png"> 
        <div class="titleh1">Name</div>
        <i class="fa fa-caret-down"></i>
    </button>
  <div class="dropdown-content">
    <ul class="dropdown-list">
      <li>
        <a href="#" class="firstImage">
          <img class="orga" src="\untitled.png" />
        </a>
        <div class="titleh2">Title</div>
        <div class="titleh3">Name</div>
      </li>
      <li>
        <a href="#">
          <img class="orga" src="\untitled.png">
        </a>
        <div class="titleh2">Title</div>
        <div class="titleh3">Name</div>
      </li>
      <li>
        <a href="#">
          <img class="orga" src="\untitled.png">
        </a>
        <div class="titleh2">Title</div>
        <div class="titleh3">Name</div>
      </li>
    </ul>
  </div>
</div>