CSS3--Flex弹性盒子布局: 实例篇-骰子布局

Posted 2021-07-09 Z && Y

01: 弹性盒子模型介绍 & 游览器调试样式（简单介绍）
02: 弹性布局和传统布局响应对比
03: 使用弹性盒子模型布局微信客户端
04: 声明弹性盒子 & 容器的属性
05: flex项目的属性
06: 实例篇-骰子布局
07: 实例篇-网格布局
08: 实例篇-圣杯布局
09: 实例篇-输入框的布局 & 悬挂式布局
10: 实例篇-固定的底栏 & 流式布局
11: CSS3 flex弹性布局重点

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1. Flex弹性盒子布局: 实例篇-骰子布局

骰子的一面，最多可以放置9个点。

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如果不加说明，本节的HTML模板一律如下。

<div class="box">
  <span class="item"></span>
</div>

• 上面代码中，div元素（代表骰子的一个面）是Flex容器，span元素（代表一个点）是Flex项目。如果有多个项目，就要添加多个span元素，以此类推。

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1.1 单项目

首先，只有左上角1个点的情况。Flex布局默认就是首行左对齐，
所以一行代码就够了。

.box {
  display: flex;
}

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设置项目的对齐方式，就能实现居中对齐和右对齐。

.box {
  display: flex;
  justify-content: center;
}

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.box {
  display: flex;
  justify-content: flex-end;
}

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设置交叉轴对齐方式，可以垂直移动主轴。

.box {
  display: flex;
  align-items: center;
}

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.box {
  display: flex;
  justify-content: center;
  align-items: center;
}

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.box {
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

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.box {
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
}

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1.2 双项目

.box {
  display: flex;
  justify-content: space-between;
}

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.box {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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.box {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
}

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.box {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
}

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.box {
  display: flex;
  justify-content: space-between;
}

.item:nth-child(2) {
  align-self: flex-end;
}

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.box {
  display: flex;
  justify-content: space-between;
}

.item:nth-child(2) {
  align-self: flex-end;
}

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1.3 三项目

.box {
  display: flex;
}

.item:nth-child(2) {
  align-self: center;
}

.item:nth-child(3) {
  align-self: flex-end;
}

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1.4 四项目

.box {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-content: space-between;
}

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HTML代码如下:

<div class="box">
  <div class="column">
    <span class="item"></span>
    <span class="item"></span>
  </div>
  <div class="column">
    <span class="item"></span>
    <span class="item"></span>
  </div>
</div>

CSS代码如下:

.box {
  display: flex;
  flex-wrap: wrap;
  align-content: space-between;
}

.column {
  flex-basis: 100%;
  display: flex;
  justify-content: space-between;
}

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1.5 六项目

.box {
  display: flex;
  flex-wrap: wrap;
  align-content: space-between;
}

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.box {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  align-content: space-between;
}

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HTML代码如下:

<div class="box">
  <div class="row">
    <span class="item"></span>
    <span class="item"></span>
    <span class="item"></span>
  </div>
  <div class="row">
    <span class="item"></span>
  </div>
  <div class="row">
     <span class="item"></span>
     <span class="item"></span>
  </div>
</div>

CSS代码如下:

.box {
  display: flex;
  flex-wrap: wrap;
}

.row{
  flex-basis: 100%;
  display:flex;
}

.row:nth-child(2){
  justify-content: center;
}

.row:nth-child(3){
  justify-content: space-between;
}

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1.6 九项目

.box {
  display: flex;
  flex-wrap: wrap;
}

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