142 lines
3.7 KiB
Markdown
142 lines
3.7 KiB
Markdown
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# Layout 布局
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### 介绍
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Layout 提供了 `van-row` 和 `van-col` 两个组件来进行行列布局。
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### 引入
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通过以下方式来全局注册组件，更多注册方式请参考[组件注册](#/zh-CN/advanced-usage#zu-jian-zhu-ce)。
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```js
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import { createApp } from 'vue';
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import { Col, Row } from 'vant';
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const app = createApp();
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app.use(Col);
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app.use(Row);
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```
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## 代码演示
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### 基础用法
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Layout 组件提供了 `24列栅格`，通过在 `Col` 上添加 `span` 属性设置列所占的宽度百分比。此外，添加 `offset` 属性可以设置列的偏移宽度，计算方式与 span 相同。
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```html
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<van-row>
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<van-col span="8">span: 8</van-col>
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<van-col span="8">span: 8</van-col>
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<van-col span="8">span: 8</van-col>
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</van-row>
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<van-row>
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<van-col span="4">span: 4</van-col>
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<van-col span="10" offset="4">offset: 4, span: 10</van-col>
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</van-row>
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<van-row>
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<van-col offset="12" span="12">offset: 12, span: 12</van-col>
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</van-row>
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```
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### 设置列元素间距
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通过 `gutter` 属性可以设置列元素之间的间距，默认间距为 0。
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```html
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<van-row gutter="20">
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<van-col span="8">span: 8</van-col>
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<van-col span="8">span: 8</van-col>
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<van-col span="8">span: 8</van-col>
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</van-row>
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```
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### 垂直间距
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如果需要设置垂直间距，可以使用数组形式设置 `[水平间距, 垂直间距]`。
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```html
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<!-- 设置垂直间距 -->
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<van-row :gutter="[20, 20]">
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<van-col span="12">span: 12</van-col>
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<van-col span="12">span: 12</van-col>
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<van-col span="12">span: 12</van-col>
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<van-col span="12">span: 12</van-col>
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</van-row>
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```
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### 对齐方式
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通过 `justify` 属性可以设置主轴上内容的对齐方式，等价于 flex 布局中的 `justify-content` 属性。
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```html
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<!-- 居中 -->
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<van-row justify="center">
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<van-col span="6">span: 6</van-col>
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<van-col span="6">span: 6</van-col>
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<van-col span="6">span: 6</van-col>
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</van-row>
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<!-- 右对齐 -->
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<van-row justify="end">
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<van-col span="6">span: 6</van-col>
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<van-col span="6">span: 6</van-col>
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<van-col span="6">span: 6</van-col>
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</van-row>
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<!-- 两端对齐 -->
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<van-row justify="space-between">
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<van-col span="6">span: 6</van-col>
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<van-col span="6">span: 6</van-col>
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<van-col span="6">span: 6</van-col>
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</van-row>
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<!-- 每个元素的两侧间隔相等 -->
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<van-row justify="space-around">
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<van-col span="6">span: 6</van-col>
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<van-col span="6">span: 6</van-col>
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<van-col span="6">span: 6</van-col>
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</van-row>
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```
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## API
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### Row Props
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| gutter | 列元素之间的间距（单位为 px） | _number \| string \| Array_ | - |
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| tag | 自定义元素标签 | _string_ | `div` |
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| justify | 主轴对齐方式，可选值为 `end` `center` <br> `space-around` `space-between` | _string_ | `start` |
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| align | 交叉轴对齐方式，可选值为 `center` `bottom` | _string_ | `top` |
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| wrap | 是否自动换行 | _boolean_ | `true` |
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### Col Props
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| 参数 | 说明 | 类型 | 默认值 |
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| ------ | -------------- | ------------------ | ------ |
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| span | 列元素宽度 | _number \| string_ | - |
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| offset | 列元素偏移距离 | _number \| string_ | - |
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| tag | 自定义元素标签 | _string_ | `div` |
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### Row Events
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| 事件名 | 说明 | 回调参数 |
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| ------ | ---------- | ------------------- |
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| click | 点击时触发 | _event: MouseEvent_ |
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### Col Events
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| 事件名 | 说明 | 回调参数 |
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| ------ | ---------- | ------------------- |
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| click | 点击时触发 | _event: MouseEvent_ |
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### 类型定义
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组件导出以下类型定义：
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```ts
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import type { ColProps, RowProps, RowAlign, RowJustify } from 'vant';
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```
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