Cascader 级联选择

级联选择框。v4.16.0中添加

import { Cascader, Row, Col  } from 'uiw';
// or
import Cascader from '@uiw/react-cascader';

基础示例

import React from 'react';
import { Cascader, Row } from 'uiw';

const Demo = () => {
  const options = [
    {
      label: '上海市',
      value: 1,
      children: [
        {
          label: '徐汇区',
          value: 4,
          children: [
            { label: '半淞园路街道', value: 6 },
            { label: '南京东路街道', value: 7 },
            { label: '外滩街道', value: 8 },
          ]
        },
      ]
    },
    {
      label: '北京市',
      value: 9,
      children: [
        {
          label: '崇文区',
          value: 12,
          children: [
            { label: '东花市街道', value: 13 },
            { label: '体育馆路街道', value: 14 },
            { label: '前门街道', value: 15 },
          ]
        },
      ]
    },
  ];

  return (
    <Row>
      <Row>
        <Cascader
          style={{ width:200 }}
          allowClear={true}
          placeholder="请选择"
          value={[1, 4, 7]}
          option={options}
          onChange={(value, seleteds) => console.log(value, seleteds)}
        />
      </Row>
      <Row style={{ marginLeft: 20 }}>
        <Cascader
          style={{ width:200 }}
          allowClear={true}
          placeholder="请选择"
          value={[1, 4, 7]}
          disabled={true}
          option={options}
          onChange={(value, seleteds) => console.log(value, seleteds)}
        />
      </Row>
    </Row>
  )
};
export default Demo

尺寸

import React from 'react';
import { Cascader, Row } from 'uiw';

const Demo = () => {
  const options = [
    {
      label: '尺寸', value: 1,
      children: [
        {
          label: 'size',
          value: 2,
          children: [
            { label: '小尺寸', value: 3 },
            { label: '默认尺寸', value: 4 },
            { label: '大尺寸', value: 5 },
          ]
        },
      ]
    }
  ];

  return (
    <Row style={{ flexDirection: 'column' }}>
      <Cascader
        style={{ width: 150 }}
        value={[1, 2, 3]}
        option={options}
        size="small"
      />
      <Cascader
        style={{ width: 175, marginTop: 10 }}
        value={[1, 2, 4]}
        option={options}
      />
      <Cascader
        style={{ width: 200, marginTop: 10 }}
        value={[1, 2, 5]}
        option={options}
        size="large"
      />
    </Row>
  )
};
export default Demo

搜索选项

import React from 'react';
import { Cascader } from 'uiw';

const Demo = () => {
  const options = [
    {
      label: '上海市',
      value: 1,
      children: [
        {
          label: '徐汇区',
          value: 4,
          children: [
            { label: '半淞园路街道', value: 6 },
            { label: '南京东路街道', value: 7 },
            { label: '外滩街道', value: 8 },
          ]
        },
      ]
    },
    {
      label: '北京市',
      value: 9,
      children: [
        {
          label: '崇文区',
          value: 12,
          children: [
            { label: '东花市街道', value: 13 },
            { label: '体育馆路街道', value: 14 },
            { label: '前门街道', value: 15 },
          ]
        },
      ]
    },
  ];

  return (
    <Cascader
      style={{ width: 200 }}
      allowClear={true}
      placeholder="请选择"
      value={[1, 4, 7]}
      option={options}
      onChange={(value, seleteds) => console.log(value, seleteds)}
      onSearch={(text)=> console.log('text', text)}
    />
  )
};

export default Demo

移入展开菜单

import React from 'react';
import { Cascader, Row } from 'uiw';

const Demo = () => {

  const options = [
    {
      label: '上海市',
      value: 1,
      children: [
        {
          label: '徐汇区',
          value: 4,
          children: [
            { label: '半淞园路街道', value: 6 },
            { label: '南京东路街道', value: 7 },
            { label: '外滩街道', value: 8 },
          ]
        },
      ]
    },
    {
      label: '北京市',
      value: 9,
      children: [
        {
          label: '崇文区',
          value: 12,
          children: [
            { label: '东花市街道', value: 13 },
            { label: '体育馆路街道', value: 14 },
            { label: '前门街道', value: 15 },
          ]
        },
      ]
    },
  ];

  return (
    <Row style={{ flexDirection: 'column' }}>
      <Cascader
        style={{ width:200 }}
        expandTrigger="hover"
        allowClear={true}
        placeholder="请选择"
        value={[1, 4, 7]}
        option={options}
        onChange={(value, seleteds) => console.log(value, seleteds)}
        onSearch={true}
      />
    </Row>
  )
};
export default Demo

在表单中使用

在 <Form /> 表单中应用 <Cascader /> 组件。

import React from 'react';
import { Form, Row, Col, Cascader, Button } from 'uiw';

const Demo = () => {
const options = [
    {
      label: '上海市',
      value: 1,
      children: [
        {
          label: '徐汇区',
          value: 4,
          children: [
            { label: '半淞园路街道', value: 6 },
            { label: '南京东路街道', value: 7 },
            { label: '外滩街道', value: 8 },
          ]
        },
      ]
    },
    {
      label: '北京市',
      value: 9,
      children: [
        {
          label: '崇文区',
          value: 12,
          children: [
            { label: '东花市街道', value: 13 },
            { label: '体育馆路街道', value: 14 },
            { label: '前门街道', value: 15 },
          ]
        },
      ]
    },
  ];

  return (
    <div>
      <Form
        onSubmitError={(error) => {
          if (error.filed) {
            return { ...error.filed };
          }
          return null;
        }}
        onSubmit={({initial, current}) => {
          const errorObj = {};
          if (!current.selectField) {
            errorObj.selectField = '默认需要选择内容，选择入内容';
          }
          if(Object.keys(errorObj).length > 0) {
            const err = new Error();
            err.filed = errorObj;
            Notify.error({ title: '提交失败！', description: '请确认提交表单是否正确！' });
            throw err;
          }
          Notify.success({
            title: '提交成功！',
            description: `表单提交成功，选择值为：${current.selectField}，将自动填充初始化值！`,
          });
        }}
        fields={{
          cascader: {
            initialValue:[1, 4, 7],
            children: (
              <Cascader
                allowClear={true}
                onSearch={true}
                placeholder="请选择"
                option={options}
                onChange={(value, seleteds) => console.log(value, seleteds)}
              />
            )
          },
        }}
      >
        {({ fields, state, canSubmit }) => {
          return (
            <div>
              <Row >
                <Col fixed style={{width:200}}>{fields.cascader}</Col>
              </Row>
              <Row>
                <Col fixed>
                  <Button disabled={!canSubmit()} type="primary" htmlType="submit">提交</Button>
                </Col>
              </Row>
              <Row>
                <Col>
                  <pre style={{ padding: 10, marginTop: 10 }}>
                    {JSON.stringify(state.current, null, 2)}
                  </pre>
                </Col>
              </Row>
            </div>
          )
        }}
      </Form>
    </div>
  );
}
export default Demo

Props

| 参数 | 说明 | 类型 | 默认值 | 版本 | | ---- | ---- | ---- | ---- | ---- | | allowClear | 支持清除 | Boolean | false | - | | disabled | 禁用选择器 | Boolean | false | - | | placeholder | 选择框默认文字 | String | - | - | | option | 选项菜单 | { value: String | Number, label: React.ReactNode, children: Array<String | Number>} | - | - | | value | 指定当前选中的条目，多选时为一个数组 | String[] | Number[] | - | - | | onChange | 选中选项调用此函数 | function( isSeleted, value, selectedOptions) | - | - | | onSearch | 开启搜索选项 | functionon(searchText) | Boolean | - | v4.16.1 | | size | 选择框尺寸 | Enum{large, default, small } | default | v17.0.1 | | inputProps | 传给Input组件的参数 | Object | - | v17.0.1 | | expandTrigger | 子集菜单的展开方式，'click' 和 'hover' | String | click | v4.18.2 |