每行5个项目，Flexbox中的项目会自动调整大小 [英] 5 items per row, auto-resize items in flexbox

问题描述

我现在有这个:

.container {
  background: gray;
  width: 600px;
  display: flex;
  flex-flow: row wrap;
  position: relative;
}
.item {
  background: blue;
  width: auto;
  height: auto;
  margin: 4px;
  flex: 1;
  flex-basis: 20%;
}

<div class="container">
  <div class="item">A</div>
  <div class="item">B</div>
  <div class="item">C</div>
  <div class="item">D</div>
  <div class="item">E</div>
  <div class="item">F</div>
  <div class="item">G</div>
</div>

我想做的是在flexbox中每行有5个项目.目前，它们没有显示是因为它们没有设置宽度/高度，这使我想到了下一个问题.是否可以自动调整项目的大小，以便每行容纳5个项目?

What I'm trying to do is have 5 items per row in a flexbox. Currently they don't appear because they don't have a set width/height, which leads me to my next question. Is it possible to auto-resize the items in order for 5 of them to fit per row?

我该怎么做?

谢谢！

推荐答案

您正确地给出了flex-basis: 20%，但是您必须将每个 flex项目上的4px边距调整为自动换行.

You are right in giving a flex-basis: 20% but you have to adjust for the 4px margin on each flex item for it to wrap properly.

使用flex: 0 1 calc(20% - 8px)-这表示该项目的宽度不会超过宽度的20％(调整边距)，并且可以根据容器的宽度缩小.参见下面的演示:

Use flex: 0 1 calc(20% - 8px) - this means the item won't grow beyond 20% of width (adjusting for margin) and can shrink based on the container width. See demo below:

.container {
  background: gray;
  width: 600px;
  height: 200px; /* height given for illustration */
  display: flex;
  flex-flow: row wrap;
  position: relative;
}

.item {
  background: blue;
  margin: 4px;
  flex: 0 1 calc(20% - 8px); /* <-- adjusting for margin */
}

<div class="container">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

另一种方法是 hacky -您可以将flex-grow设置为一个，并使用flex: 1 1 calc(20% - 4px)设置flex-basis: calc(20% - 4px)，并使用伪元素来填充剩余空间:

Another approach is a bit hacky - you can keep flex-grow set to one and flex-basis: calc(20% - 4px) using flex: 1 1 calc(20% - 4px), and use a pseudo element that fills the remaining space:

.container {
  background: gray;
  width: 600px;
  height: 200px; /* height given for illustration */
  display: flex;
  flex-flow: row wrap;
  position: relative;
}

.item {
  background: blue;
  margin: 4px;
  flex: 1 1 calc(20% - 8px); /* <-- adjusting for margin */
}

.container:after {
  content: '';
  display: block;
  flex: 999; /* grow by a large number */
}

<div class="container">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

如果您没有每行 n个项目 的要求，则可以参考以下内容:

If you don't have the n item per row requirement then you can refer this:

• 行为类似于grid-自动流密

如果一行中的项目少于5个，并且希望它们填充剩余空间，请使用flex: 1 1 calc(20% - 8px)(请注意，此处flex-grow设置为1，以便 flex项目在最后一行扩展以填充剩余空间):

If in a row you have less than 5 items and you want them to fill in the remaining space use flex: 1 1 calc(20% - 8px) (note that flex-grow is set to 1 here so that the flex items in the last rows expand to fill the remaining space):

.container {
  background: gray;
  width: 600px;
  height: 200px;  /* height given for illustration */
  display: flex;
  flex-flow: row wrap;
  position: relative;
}

.item {
  background: blue;
  margin: 4px;
  flex: 1 1 calc(20% - 8px);  /* <-- adjusting for margin */
}

<div class="container">
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
  <div class="item"></div>
</div>

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