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197 lines
5.7 KiB
Markdown
197 lines
5.7 KiB
Markdown
# Tabbar 标签栏
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### 引入
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```js
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import Vue from 'vue';
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import { Tabbar, TabbarItem } from 'vant';
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Vue.use(Tabbar);
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Vue.use(TabbarItem);
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```
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## 代码演示
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### 基础用法
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`v-model`默认绑定选中标签的索引值,通过修改`v-model`即可切换选中的标签
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```html
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<van-tabbar v-model="active">
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<van-tabbar-item icon="home-o">标签</van-tabbar-item>
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<van-tabbar-item icon="search">标签</van-tabbar-item>
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<van-tabbar-item icon="friends-o">标签</van-tabbar-item>
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<van-tabbar-item icon="setting-o">标签</van-tabbar-item>
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</van-tabbar>
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```
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```js
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export default {
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data() {
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return {
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active: 0,
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};
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},
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};
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```
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### 通过名称匹配
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在标签指定`name`属性的情况下,`v-model`的值为当前标签的`name`
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```html
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<van-tabbar v-model="active">
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<van-tabbar-item name="home" icon="home-o">标签</van-tabbar-item>
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<van-tabbar-item name="search" icon="search">标签</van-tabbar-item>
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<van-tabbar-item name="friends" icon="friends-o">标签</van-tabbar-item>
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<van-tabbar-item name="setting" icon="setting-o">标签</van-tabbar-item>
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</van-tabbar>
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```
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```js
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export default {
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data() {
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return {
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active: 'home',
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};
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},
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};
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```
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### 徽标提示
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设置`dot`属性后,会在图标右上角展示一个小红点。设置`badge`属性后,会在图标右上角展示相应的徽标
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```html
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<van-tabbar v-model="active">
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<van-tabbar-item icon="home-o">标签</van-tabbar-item>
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<van-tabbar-item icon="search" dot>标签</van-tabbar-item>
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<van-tabbar-item icon="friends-o" badge="5">标签</van-tabbar-item>
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<van-tabbar-item icon="setting-o" badge="20">标签</van-tabbar-item>
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</van-tabbar>
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```
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### 自定义图标
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通过 icon 插槽自定义图标,可以通过 `slot-scope` 判断标签是否选中
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```html
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<van-tabbar v-model="active">
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<van-tabbar-item badge="3">
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<span>自定义</span>
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<template #icon="props">
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<img :src="props.active ? icon.active : icon.inactive" />
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</template>
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</van-tabbar-item>
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<van-tabbar-item icon="search">标签</van-tabbar-item>
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<van-tabbar-item icon="setting-o">标签</van-tabbar-item>
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</van-tabbar>
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```
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```js
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export default {
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data() {
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return {
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active: 0,
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icon: {
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active: 'https://img.yzcdn.cn/vant/user-active.png',
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inactive: 'https://img.yzcdn.cn/vant/user-inactive.png',
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},
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};
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},
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};
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```
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### 自定义颜色
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```html
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<van-tabbar v-model="active" active-color="#07c160" inactive-color="#000">
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<van-tabbar-item icon="home-o">标签</van-tabbar-item>
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<van-tabbar-item icon="search">标签</van-tabbar-item>
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<van-tabbar-item icon="friends-o">标签</van-tabbar-item>
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<van-tabbar-item icon="setting-o">标签</van-tabbar-item>
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</van-tabbar>
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```
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### 监听切换事件
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```html
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<van-tabbar v-model="active" @change="onChange">
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<van-tabbar-item icon="home-o">标签1</van-tabbar-item>
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<van-tabbar-item icon="search">标签2</van-tabbar-item>
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<van-tabbar-item icon="friends-o">标签3</van-tabbar-item>
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<van-tabbar-item icon="setting-o">标签4</van-tabbar-item>
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</van-tabbar>
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```
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```js
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import { Notify } from 'vant';
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export default {
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methods: {
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onChange(index) {
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Notify({ type: 'primary', message: index });
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},
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},
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};
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```
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### 路由模式
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标签栏支持路由模式,用于搭配`vue-router`使用。路由模式下会匹配页面路径和标签的`to`属性,并自动选中对应的标签
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```html
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<router-view />
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<van-tabbar route>
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<van-tabbar-item replace to="/home" icon="home-o">
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标签
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</van-tabbar-item>
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<van-tabbar-item replace to="/search" icon="search">
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标签
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</van-tabbar-item>
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</van-tabbar>
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```
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## API
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### Tabbar Props
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| v-model | 当前选中标签的名称或索引值 | _number \| string_ | `0` |
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| fixed | 是否固定在底部 | _boolean_ | `true` |
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| border | 是否显示外边框 | _boolean_ | `true` |
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| z-index | 元素 z-index | _number \| string_ | `1` |
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| active-color | 选中标签的颜色 | _string_ | `#1989fa` |
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| inactive-color | 未选中标签的颜色 | _string_ | `#7d7e80` |
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| route | 是否开启路由模式 | _boolean_ | `false` |
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| placeholder `v2.6.0` | 固定在底部时,是否在标签位置生成一个等高的占位元素 | _boolean_ | `false` |
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| safe-area-inset-bottom | 是否开启[底部安全区适配](#/zh-CN/quickstart#di-bu-an-quan-qu-gua-pei),设置 fixed 时默认开启 | _boolean_ | `false` |
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### Tabbar Events
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| 事件名 | 说明 | 回调参数 |
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| ------ | -------------- | ---------------------------------- |
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| change | 切换标签时触发 | active: 当前选中标签的名称或索引值 |
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### TabbarItem Props
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| name | 标签名称,作为匹配的标识符 | _number \| string_ | 当前标签的索引值 |
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| icon | [图标名称](#/zh-CN/icon)或图片链接 | _string_ | - |
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| icon-prefix `v2.5.3` | 图标类名前缀,同 Icon 组件的 [class-prefix 属性](#/zh-CN/icon#props) | _string_ | `van-icon` |
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| dot | 是否显示图标右上角小红点 | _boolean_ | `false` |
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| badge `v2.5.6` | 图标右上角徽标的内容 | _number \| string_ | - |
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| info | 图标右上角徽标的内容(已废弃,请使用 badge 属性) | _number \| string_ | - |
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| url | 点击后跳转的链接地址 | _string_ | - |
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| to | 点击后跳转的目标路由对象,同 vue-router 的 [to 属性](https://router.vuejs.org/zh/api/#to) | _string \| object_ | - |
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| replace | 是否在跳转时替换当前页面历史 | _boolean_ | `false` |
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### TabbarItem Slots
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| 名称 | 说明 | SlotProps |
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| ---- | ---------- | ---------------------- |
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| icon | 自定义图标 | active: 是否为选中标签 |
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