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145 lines
3.3 KiB
Markdown
145 lines
3.3 KiB
Markdown
## Tabbar 标签栏
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### 使用指南
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在 app.json 或 index.json 中引入组件
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es6
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```json
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"usingComponents": {
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"van-tabbar": "path/to/vant-weapp/dist/tabbar/index",
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"van-tabbar-item": "path/to/vant-weapp/dist/tabbar-item/index"
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}
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```
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es5
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```json
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"usingComponents": {
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"van-tabbar": "path/to/vant-weapp/lib/tabbar/index",
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"van-tabbar-item": "path/to/vant-weapp/lib/tabbar-item/index"
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}
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```
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### 代码演示
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#### 基础用法
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```html
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<van-tabbar active="{{ active }}" bind:change="onChange">
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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" info="5">标签</van-tabbar-item>
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<van-tabbar-item icon="setting-o" info="20">标签</van-tabbar-item>
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</van-tabbar>
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```
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```javascript
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Page({
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data: {
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active: 0
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},
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// event.detail 的值为当前选中项的索引
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onChange(event) {
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console.log(event.detail);
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}
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});
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```
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#### 自定义图标
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可以通过 slot 自定义图标，其中 icon slot 代表未选中状态下的图标，icon-active slot 代表选中状态下的图标
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```html
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<van-tabbar active="{{ active }}" bind:change="onChange">
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<van-tabbar-item info="3">
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<image
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slot="icon"
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src="{{ icon.normal }}"
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mode="aspectFit"
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/>
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<image
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slot="icon-active"
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src="{{ icon.active }}"
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mode="aspectFit"
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/>
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自定义
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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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```javascript
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Page({
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data: {
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active: 0,
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icon: {
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normal: '//img.yzcdn.cn/icon-normal.png',
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active: '//img.yzcdn.cn/icon-active.png'
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}
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},
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onChange(event) {
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console.log(event.detail);
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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
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active="{{ active }}"
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active-color="#07c160"
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bind:change="onChange"
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>
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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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```javascript
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Page({
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data: {
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active: 0
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},
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// event.detail 的值为当前选中项的索引
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onChange(event) {
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console.log(event.detail);
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}
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});
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```
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### Tabbar API
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| 参数 | 说明 | 类型 | 默认值 |
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|-----------|-----------|-----------|-------------|
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| active | 当前选中标签的索引 | `Number` | - |
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| active-color | 选中标签的颜色 | `String` | `#1989fa` |
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| fixed | 是否固定在底部 | `Boolean` | `true` |
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| border | 是否展示外边框 | `Boolean` | `true` |
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| z-index | 元素 z-index | `Number` | `1` |
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| safe-area-inset-bottom | 是否为iPhoneX留出底部安全距离 | `Boolean` | `true` |
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### Tabbar Event
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| 事件名 | 说明 | 参数 |
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|-----------|-----------|-----------|
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| bind:change | 切换标签时触发 | event.detail: 当前选中标签的索引 |
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### TabbarItem API
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| 参数 | 说明 | 类型 | 默认值 |
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|-----------|-----------|-----------|-----------|
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| icon | 图标名称或图片链接，可选值见 Icon 组件 | `String` | - |
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| dot | 是否显示小红点 | `Boolean` | - |
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| info | 图标右上角提示信息 | `String | Number` | - |
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### TabbarItem Slot
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| 名称 | 说明 |
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|-----------|-----------|
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| icon | 未选中时的图标 |
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| icon-active | 选中时的图标 |
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