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132 lines
7.2 KiB
Markdown
132 lines
7.2 KiB
Markdown
---
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category: Components
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group: 数据录入
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title: Cascader
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subtitle: 级联选择
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description: 级联选择框。
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cover: https://mdn.alipayobjects.com/huamei_7uahnr/afts/img/A*ngTnQZNOcK0AAAAAAAAAAAAADrJ8AQ/original
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coverDark: https://mdn.alipayobjects.com/huamei_7uahnr/afts/img/A*Nt8xR7afyr0AAAAAAAAAAAAADrJ8AQ/original
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demo:
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cols: 2
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---
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## 何时使用
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- 需要从一组相关联的数据集合进行选择,例如省市区,公司层级,事物分类等。
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- 从一个较大的数据集合中进行选择时,用多级分类进行分隔,方便选择。
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- 比起 Select 组件,可以在同一个浮层中完成选择,有较好的体验。
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## 代码演示
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<!-- prettier-ignore -->
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<code src="./demo/basic.tsx">基本</code>
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<code src="./demo/default-value.tsx">默认值</code>
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<code src="./demo/custom-trigger.tsx">可以自定义显示</code>
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<code src="./demo/hover.tsx">移入展开</code>
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<code src="./demo/disabled-option.tsx">禁用选项</code>
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<code src="./demo/change-on-select.tsx">选择即改变</code>
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<code src="./demo/multiple.tsx">多选</code>
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<code src="./demo/showCheckedStrategy.tsx">自定义回填方式</code>
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<code src="./demo/size.tsx">大小</code>
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<code src="./demo/custom-render.tsx">自定义已选项</code>
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<code src="./demo/search.tsx">搜索</code>
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<code src="./demo/lazy.tsx">动态加载选项</code>
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<code src="./demo/fields-name.tsx">自定义字段名</code>
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<code src="./demo/suffix.tsx" version="5.22.0">前后缀</code>
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<code src="./demo/custom-dropdown.tsx">扩展菜单</code>
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<code src="./demo/placement.tsx">弹出位置</code>
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<code src="./demo/status.tsx">自定义状态</code>
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<code src="./demo/panel.tsx" version=">= 5.10.0">面板使用</code>
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<code src="./demo/render-panel.tsx" debug>_InternalPanelDoNotUseOrYouWillBeFired</code>
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## API
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通用属性参考:[通用属性](/docs/react/common-props)
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```jsx
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<Cascader options={options} onChange={onChange} />
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```
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| 参数 | 说明 | 类型 | 默认值 | 版本 |
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| --- | --- | --- | --- | --- |
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| allowClear | 支持清除 | boolean \| { clearIcon?: ReactNode } | true | 5.8.0: 支持对象形式 |
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| autoClearSearchValue | 是否在选中项后清空搜索框,只在 `multiple` 为 `true` 时有效 | boolean | true | 5.9.0 |
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| autoFocus | 自动获取焦点 | boolean | false | |
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| changeOnSelect | 单选时生效(multiple 下始终都可以选择),点选每级菜单选项值都会发生变化。 | boolean | false | |
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| className | 自定义类名 | string | - | |
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| defaultValue | 默认的选中项 | string\[] \| number\[] | \[] | |
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| disabled | 禁用 | boolean | false | |
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| displayRender | 选择后展示的渲染函数 | (label, selectedOptions) => ReactNode | label => label.join(`/`) | `multiple`: 4.18.0 |
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| tagRender | 自定义 tag 内容 render,仅在多选时生效 | ({ label: string, onClose: function, value: string }) => ReactNode | - | |
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| popupClassName | 自定义浮层类名 | string | - | 4.23.0 |
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| dropdownRender | 自定义下拉框内容 | (menus: ReactNode) => ReactNode | - | 4.4.0 |
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| expandIcon | 自定义次级菜单展开图标 | ReactNode | - | 4.4.0 |
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| expandTrigger | 次级菜单的展开方式,可选 'click' 和 'hover' | string | `click` | |
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| fieldNames | 自定义 options 中 label value children 的字段 | object | { label: `label`, value: `value`, children: `children` } | |
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| getPopupContainer | 菜单渲染父节点。默认渲染到 body 上,如果你遇到菜单滚动定位问题,试试修改为滚动的区域,并相对其定位。[示例](https://codepen.io/afc163/pen/zEjNOy?editors=0010) | function(triggerNode) | () => document.body | |
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| loadData | 用于动态加载选项,无法与 `showSearch` 一起使用 | (selectedOptions) => void | - | |
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| maxTagCount | 最多显示多少个 tag,响应式模式会对性能产生损耗 | number \| `responsive` | - | 4.17.0 |
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| maxTagPlaceholder | 隐藏 tag 时显示的内容 | ReactNode \| function(omittedValues) | - | 4.17.0 |
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| maxTagTextLength | 最大显示的 tag 文本长度 | number | - | 4.17.0 |
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| notFoundContent | 当下拉列表为空时显示的内容 | ReactNode | `Not Found` | |
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| open | 控制浮层显隐 | boolean | - | 4.17.0 |
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| options | 可选项数据源 | [Option](#option)\[] | - | |
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| placeholder | 输入框占位文本 | string | - | |
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| placement | 浮层预设位置 | `bottomLeft` `bottomRight` `topLeft` `topRight` | `bottomLeft` | 4.17.0 |
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| prefix | 自定义前缀 | ReactNode | - | 5.22.0 |
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| showSearch | 在选择框中显示搜索框 | boolean \| [Object](#showsearch) | false | |
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| size | 输入框大小 | `large` \| `middle` \| `small` | - | |
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| status | 设置校验状态 | 'error' \| 'warning' | - | 4.19.0 |
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| style | 自定义样式 | CSSProperties | - | |
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| suffixIcon | 自定义的选择框后缀图标 | ReactNode | - | |
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| value | 指定选中项 | string\[] \| number\[] | - | |
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| variant | 形态变体 | `outlined` \| `borderless` \| `filled` | `outlined` | 5.13.0 |
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| onChange | 选择完成后的回调 | (value, selectedOptions) => void | - | |
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| onDropdownVisibleChange | 显示/隐藏浮层的回调 | (value) => void | - | 4.17.0 |
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| multiple | 支持多选节点 | boolean | - | 4.17.0 |
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| showCheckedStrategy | 定义选中项回填的方式。`Cascader.SHOW_CHILD`: 只显示选中的子节点。`Cascader.SHOW_PARENT`: 只显示父节点(当父节点下所有子节点都选中时)。 | `Cascader.SHOW_PARENT` \| `Cascader.SHOW_CHILD` | `Cascader.SHOW_PARENT` | 4.20.0 |
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| removeIcon | 自定义的多选框清除图标 | ReactNode | - | |
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| searchValue | 设置搜索的值,需要与 `showSearch` 配合使用 | string | - | 4.17.0 |
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| onSearch | 监听搜索,返回输入的值 | (search: string) => void | - | 4.17.0 |
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| dropdownMenuColumnStyle | 下拉菜单列的样式 | CSSProperties | - | |
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| optionRender | 自定义渲染下拉选项 | (option: Option) => React.ReactNode | - | 5.16.0 |
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### showSearch
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`showSearch` 为对象时,其中的字段:
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| 参数 | 说明 | 类型 | 默认值 | 版本 |
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| --- | --- | --- | --- | --- |
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| filter | 接收 `inputValue` `path` 两个参数,当 `path` 符合筛选条件时,应返回 true,反之则返回 false | function(inputValue, path): boolean | - | |
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| limit | 搜索结果展示数量 | number \| false | 50 | |
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| matchInputWidth | 搜索结果列表是否与输入框同宽([效果](https://github.com/ant-design/ant-design/issues/25779)) | boolean | true | |
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| render | 用于渲染 filter 后的选项 | function(inputValue, path): ReactNode | - | |
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| sort | 用于排序 filter 后的选项 | function(a, b, inputValue) | - | |
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### Option
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```typescript
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interface Option {
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value: string | number;
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label?: React.ReactNode;
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disabled?: boolean;
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children?: Option[];
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// 标记是否为叶子节点,设置了 `loadData` 时有效
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// 设为 `false` 时会强制标记为父节点,即使当前节点没有 children,也会显示展开图标
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isLeaf?: boolean;
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}
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```
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## 方法
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| 名称 | 描述 | 版本 |
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| ------- | -------- | ---- |
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| blur() | 移除焦点 | |
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| focus() | 获取焦点 | |
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> 注意,如果需要获得中国省市区数据,可以参考 [china-division](https://gist.github.com/afc163/7582f35654fd03d5be7009444345ea17)。
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## 主题变量(Design Token)
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<ComponentTokenTable component="Cascader"></ComponentTokenTable>
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