97 lines
3.3 KiB
Markdown
97 lines
3.3 KiB
Markdown
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---
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title: Cascader 级联选择器
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description: 级联选择器适用于有清晰层级结构的数据集合，用户可以通过逐级查看并选择。
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spline: form
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isComponent: true
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---
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## 引入
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可在 `main.ts` 或在需要使用的页面或组件中引入。
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```js
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import TCascader from '@tdesign/uniapp/cascader/cascader.vue';
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```
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### 基础用法
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{{ base }}
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### 选项卡风格
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{{ theme-tab }}
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### 进阶
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#### 带初始值
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{{ with-value }}
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#### 自定义 keys
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{{ keys }}
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#### 使用次级标题
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{{ with-title }}
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#### 选择任意一项
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{{ check-strictly }}
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## API
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### Cascader Props
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名称 | 类型 | 默认值 | 描述 | 必传
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-- | -- | -- | -- | --
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custom-style | Object | - | 自定义样式 | N
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check-strictly | Boolean | false | 父子节点选中状态不再关联，可各自选中或取消 | N
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close-btn | Boolean | true | 关闭按钮 | N
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keys | Object | - | 用来定义 value / label / children / disabled 在 `options` 中对应的字段别名。TS 类型：`CascaderKeysType` `type CascaderKeysType = TreeKeysType`。[通用类型定义](https://github.com/tencent/tdesign-miniprogram/blob/develop/packages/uniapp-components/common/common.ts)。[详细类型定义](https://github.com/tencent/tdesign-miniprogram/blob/develop/packages/uniapp-components/cascader/type.ts) | N
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options | Array | [] | 可选项数据源。TS 类型：`Array<CascaderOption>` | N
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placeholder | String | 选择选项 | 未选中时的提示文案 | N
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sub-titles | Array | [] | 每级展示的次标题。TS 类型：`Array<string>` | N
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theme | String | step | 展示风格。可选项：step/tab | N
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title | String | - | 标题 | N
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value | String / Number | - | 选项值。支持语法糖 `v-model:value` | N
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default-value | String / Number | - | 选项值。非受控属性 | N
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visible | Boolean | false | 是否展示 | N
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### Cascader Events
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名称 | 参数 | 描述
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-- | -- | --
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change | `(context: { value: string \| number, selectedOptions: string[] })` | 值发生变更时触发
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close | `(context: { trigger: CascaderTriggerSource })` | 关闭时触发。[详细类型定义](https://github.com/tencent/tdesign-miniprogram/blob/develop/packages/uniapp-components/cascader/type.ts)。<br/>`type CascaderTriggerSource = 'overlay' \| 'close-btn' \| 'finish'`<br/>
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pick | `(context: { value: string \| number, label: string, index: number, level: number })` | 选择后触发
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### Cascader Slots
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名称 | 描述
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-- | --
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close-btn | 自定义 `close-btn` 显示内容
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header | 头部
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middle-content | 中间内容
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title | 自定义 `title` 显示内容
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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-cascader-active-color | @brand-color | -
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--td-cascader-bg-color | @bg-color-container | -
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--td-cascader-border-color | @component-stroke | -
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--td-cascader-content-height | 78vh | -
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--td-cascader-disabled-color | @text-color-disabled | -
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--td-cascader-options-height | calc(100% - @cascader-step-height) | -
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--td-cascader-options-title-color | @text-color-placeholder | -
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--td-cascader-step-arrow-color | @text-color-placeholder | -
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--td-cascader-step-dot-size | 16rpx | -
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--td-cascader-step-height | 88rpx | -
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--td-cascader-title-color | @text-color-primary | -
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--td-cascader-title-font | @font-title-large | -
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--td-cascader-title-padding | @spacer-2 | -
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