New Huajishe Check ChaoXing
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---
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title: TabBar 标签栏
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description: 用于在不同功能模块之间进行快速切换,位于页面底部。
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spline: navigation
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isComponent: true
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---
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<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>
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## 引入
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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。
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```json
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"usingComponents": {
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"t-tab-bar": "tdesign-miniprogram/tab-bar/tab-bar",
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"t-tab-bar-item": "tdesign-miniprogram/tab-bar-item/tab-bar-item"
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}
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```
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## 代码演示
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<a href="https://developers.weixin.qq.com/s/H0G5SdmU7HSh" title="在开发者工具中预览效果" target="_blank" rel="noopener noreferrer"> 在开发者工具中预览效果 </a>
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<blockquote style="background-color: #d9e1ff; font-size: 15px; line-height: 26px;margin: 16px 0 0;padding: 16px; border-radius: 6px; color: #0052d9" >
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<p>Tips: 请确保开发者工具为打开状态。导入开发者工具后,依次执行:npm i > 构建npm包 > 勾选 "将JS编译成ES5"</p>
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</blockquote>
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### 组件类型
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#### 纯文本标签栏
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{{ text-only }}
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#### 图标加文字标签栏
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{{ base }}
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#### 纯图标标签栏
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{{ icon-only }}
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#### 双层级纯文本标签栏
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{{ sub }}
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### 组件样式
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#### 弱选中标签栏
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{{ badge }}
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#### 悬浮胶囊标签栏
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{{ round }}
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#### 自定义主题
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{{ custom }}
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## API
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### TabBar Props
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名称 | 类型 | 默认值 | 描述 | 必传
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-- | -- | -- | -- | --
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style | Object | - | 样式 | N
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custom-style | Object | - | 样式,一般用于开启虚拟化组件节点场景 | N
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bordered | Boolean | true | 是否显示外边框 | N
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fixed | Boolean | true | 是否固定在底部 | N
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safe-area-inset-bottom | Boolean | true | 是否为 iPhoneX 留出底部安全距离 | N
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shape | String | normal | 标签栏的形状。可选项:normal/round | N
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split | Boolean | true | 是否需要分割线 | N
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theme | String | normal | 选项风格。可选项:normal/tag | N
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value | String / Number / Array | - | 当前选中标签的索引。TS 类型:`string \| number \| Array<string \| number>` | N
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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
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### TabBar Events
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名称 | 参数 | 描述
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-- | -- | --
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change | `(value: string \| number)` | 选中标签切换时触发
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### TabBar External Classes
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类名 | 描述
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-- | --
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t-class | 根节点样式类
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### TabBarItem Props
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名称 | 类型 | 默认值 | 描述 | 必传
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-- | -- | -- | -- | --
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style | Object | - | 样式 | N
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custom-style | Object | - | 样式,一般用于开启虚拟化组件节点场景 | N
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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
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icon | String / Object / Slot | - | 图标名称。传入对象时透传至 Icon 组件。[通用类型定义](https://github.com/Tencent/tdesign-miniprogram/blob/develop/src/common/common.ts) | N
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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
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value | String / Number | - | 标识符 | N
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### CSS Variables
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组件提供了下列 CSS 变量,可用于自定义样式。
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名称 | 默认值 | 描述
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-- | -- | --
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--td-tab-bar-active-bg | @brand-color-light | -
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--td-tab-bar-active-color | @brand-color | -
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--td-tab-bar-bg-color | @bg-color-container | -
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--td-tab-bar-border-color | @border-color | -
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--td-tab-bar-color | @font-gray-1 | -
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--td-tab-bar-height | 80rpx | -
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--td-tab-bar-hover-bg-color | rgba(0, 0, 0, 0.05) | -
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--td-tab-bar-spread-border-color | @border-color | -
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--td-tab-bar-spread-shadow | @shadow-3 | -
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--td-tab-bar-border-color | @border-color | -
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--td-tab-bar-round-shadow | @shadow-3 | -
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