将弹性项目固定到容器的底部

Question

我有4个带标题，说明和按钮的区块。

我希望将标题和说明保持在顶部，并且无论描述或标题有多长，按钮都要在底部对齐。

我还需要保持相同的HTML结构。

我实际需要的示例图片：

有人可以解决这个问题吗？到目前为止，我还没有在互联网上找到解决办法。

/* FLEXBOX RELATED */
.grid {
  display: flex;
  justify-content: space-between;
  flex-flow: row wrap;
}
.block {
  flex: 0 24%;
  display: flex;
}
.container {
  display: flex;
  flex-flow: row wrap;
  align-items: flex-start;
}
.title {
  flex: 0 100%;
}
.desc {
  flex: 0 100%;
}
.button {
  flex: 0 100%;
  align-self: flex-end;
}


/* NO FLEXBOX RELATED */
.block {
  background-color: #ccc;
}
.title {
  font-size: 2rem;
  font-weight: bold;
  padding: 0.5rem;
  text-align: center;
}
.desc {
  background-color: grey;
  padding: 0.5rem;
}
.button {
  padding: 0.5rem;
  color: blue;
  text-align: center;
  font-weight: bold;
}

<div class="grid">
  <div class="block">
    <div class="container">
      <div class="title">Title 1</div>
      <div class="desc">Description Description Description Description Description Description Description Description Description Description</div>
      <div class="button">Button</div>
    </div>
  </div>
  <div class="block">
    <div class="container">
      <div class="title">Title 2</div>
      <div class="desc">Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description</div>
      <div class="button">Button</div>
    </div>
  </div>
  <div class="block">
    <div class="container">
      <div class="title">Title 3</div>
      <div class="desc">Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description</div>
      <div class="button">Button</div>
    </div>
  </div>
  <div class="block">
    <div class="container">
      <div class="title">Title 4</div>
      <div class="desc">Description Description Description Description Description Description Description Description Description Description</div>
      <div class="button">Button</div>
    </div>
  </div>
</div>

The codepen code is here

Answer 1

由于您正在使用行方向Flex容器，因此无法将最后一项固定到底部。你正在处理十字轴空间分布，这意味着柔性线被拉伸或打包，并且没有办法将两个项目固定到顶部，一个固定到底部（除非你超越了flexbox和使用绝对定位）。

这是一个完整的解释。

• How does flex-wrap work with align-self, align-items and align-content?

使布局工作的一种简单而有效的方法是列方向容器，在最后一项上具有弹性自动边距。通过对齐主轴上的项目，您可以将各个项目分开。

以下是flex auto margin的解释：

• In CSS Flexbox, why are there no "justify-items" and "justify-self" properties?

/* FLEXBOX RELATED */
.grid {
  display: flex;
  justify-content: space-between;
  flex-flow: row wrap;
}
.block {
  flex: 0 24%;
  display: flex;
}
.container {
  display: flex;
  flex-direction: column; /* new */
  /* flex-flow: row wrap; */
  /* align-items: flex-start; */
}
.title {
  /* flex: 0 100%; */
}
.desc {
  /* flex: 0 100%; */
}
.button {
  margin-top: auto; /* new */
  /* flex: 0 100%; */
  /* align-self: flex-end; */
}


/* NO FLEXBOX RELATED */
.block {
  background-color: #ccc;
}
.title {
  font-size: 2rem;
  font-weight: bold;
  padding: 0.5rem;
  text-align: center;
}
.desc {
  background-color: grey;
  padding: 0.5rem;
}
.button {
  padding: 0.5rem;
  color: blue;
  text-align: center;
  font-weight: bold;
}

<div class="grid">
  <div class="block">
    <div class="container">
      <div class="title">Title 1</div>
      <div class="desc">Description Description Description Description Description Description Description Description Description Description</div>
      <div class="button">Button</div>
    </div>
  </div>
  <div class="block">
    <div class="container">
      <div class="title">Title 2</div>
      <div class="desc">Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description</div>
      <div class="button">Button</div>
    </div>
  </div>
  <div class="block">
    <div class="container">
      <div class="title">Title 3</div>
      <div class="desc">Description Description Description Description Description Description Description Description Description Description Description Description Description Description Description</div>
      <div class="button">Button</div>
    </div>
  </div>
  <div class="block">
    <div class="container">
      <div class="title">Title 4</div>
      <div class="desc">Description Description Description Description Description Description Description Description Description Description</div>
      <div class="button">Button</div>
    </div>
  </div>
</div>

revised codepen