city-casereport/miniprogram_npm/tdesign-miniprogram/tab-bar/README.md
2023-12-06 14:22:42 +08:00

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---
title: TabBar 标签栏
description: 用于在不同功能模块之间进行快速切换,位于页面底部。
spline: navigation
isComponent: true
---
<span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20lines-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20functions-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20statements-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20branches-93%25-blue" /></span>
## 引入
全局引入,在 miniprogram 根目录下的`app.json`中配置,局部引入,在需要引入的页面或组件的`index.json`中配置。
```json
"usingComponents": {
"t-tab-bar": "tdesign-miniprogram/tab-bar/tab-bar",
"t-tab-bar-item": "tdesign-miniprogram/tab-bar-item/tab-bar-item"
}
```
## 代码演示
### 组件类型
#### 纯文本标签栏
{{ text-only }}
#### 图标加文字标签栏
{{ base }}
#### 纯图标标签栏
{{ icon-only }}
#### 双层级纯文本标签栏
{{ sub }}
### 组件样式
#### 弱选中标签栏
{{ badge }}
#### 悬浮胶囊标签栏
{{ round }}
#### 自定义主题
{{ custom }}
## API
### TabBar Props
名称 | 类型 | 默认值 | 说明 | 必传
-- | -- | -- | -- | --
bordered | Boolean | true | 是否显示外边框 | N
fixed | Boolean | true | 是否固定在底部 | N
safe-area-inset-bottom | Boolean | true | 是否为 iPhoneX 留出底部安全距离 | N
shape | String | normal | 标签栏的形状。可选项normal/round | N
split | Boolean | true | 是否需要分割线 | N
theme | String | normal | 选项风格。可选项normal/tag | N
value | String / Number / Array | null | 当前选中标签的索引。TS 类型:`string \| number \| Array<string \| number>` | N
default-value | String / Number / Array | undefined | 当前选中标签的索引。非受控属性。TS 类型:`string \| number \| Array<string \| number>` | N
### TabBar Events
名称 | 参数 | 描述
-- | -- | --
change | `(value: string \| number)` | 选中标签切换时触发
### TabBar 外部样式类
类名 | 说明
-- | --
t-class | 根节点样式类
### TabBarItem Props
名称 | 类型 | 默认值 | 说明 | 必传
-- | -- | -- | -- | --
badge-props | Object | - | 图标右上角提示信息。TS 类型:`BadgeProps`[Badge API Documents](./badge?tab=api)。[详细类型定义](https://github.com/Tencent/tdesign-miniprogram/tree/develop/src/tab-bar-item/type.ts) | N
icon | String / Object / Slot | - | 图标名称。传入对象时透传至 Icon 组件 | N
sub-tab-bar | Array | - | 二级菜单。TS 类型:`SubTabBarItem[] ` `interface SubTabBarItem { value: string; label: string }`。[详细类型定义](https://github.com/Tencent/tdesign-miniprogram/tree/develop/src/tab-bar-item/type.ts) | N
value | String / Number | - | 标识符 | N
### CSS 变量
组件提供了下列 CSS 变量,可用于自定义样式。
名称 | 默认值 | 描述
-- | -- | --
--td-tab-bar-active-bg | @brand-color-light | -
--td-tab-bar-active-color | @brand-color | -
--td-tab-bar-bg-color | @bg-color-container | -
--td-tab-bar-border-color | @border-color | -
--td-tab-bar-color | @font-gray-1 | -
--td-tab-bar-height | 80rpx | -
--td-tab-bar-hover-bg-color | rgba(0, 0, 0, 0.05) | -
--td-tab-bar-spread-border-color | @border-color | -
--td-tab-bar-spread-shadow | @shadow-3 | -
--td-tab-bar-border-color | @border-color | -
--td-tab-bar-round-shadow | @shadow-3 | -