关于antd tree和父子组件之间的传值问题(react 总结)

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

项目需求：点击产品树节点时获取该节点的所有父节点，同时回填表格的搜索条件，完成搜索功能，搜索结果展示在下方的table中。

写了三个组件：

现在有个业务场景交互：在orderTree组件中点击树节点，获取当前节点以及所有的父节点的Id 放入一个对象arrKeys中，并在orderForm组件中使用（回填类型下拉选择框，objId对象作为查询接口的入参）

现在可以分部解决问题：

1.首先获取点击的树节点以及所有父节点的id ---arrKeys

2.在点击树节点获取当前节点以及所有父级节点之后，通过this.props.idObject(arrKeys)把 arrKeys传给父组件。

3.在tree组件和form组件中的componentDidMount生命周期中把整个组件传给父组件

4.form组件中的inquery方法：

现附上tree.js代码

import React, { Component } from 'react';
import { connect } from 'dva';
import { Divider, Modal, Table, message, Tag, Spin } from 'antd';
import router from 'umi/router';
import style from '../style.less';
import { Tree, Input } from 'antd';

const { confirm } = Modal;
const { TreeNode } = Tree;
const { Search } = Input;
let dataList = [];
let keysObj = {}; // 当前节点以及所有父节点的id
let firstParentKey = {}; // 一级根节点的id
const intetorFun = (data, key, string) => {
  if (string) {
    firstParentKey = {
      [data.param]: data.paramId,
    };
  }
  if (data.children && data.children.length !== 0) {
    data.children.forEach(item => {
      if (item.id === key[0]) {
        keysObj = {
          [data.param]: data.paramId,
          [item.param]: item.paramId,
          ...firstParentKey,
        };
      } else {
        intetorFun(item, key);
      }
    });
  }
  return keysObj;
};
const getParentKey = (key, tree) => {
  let parentKey = [];
  for (let i = 0; i < tree.length; i++) {
    const node = tree[i];
    parentKey = intetorFun(node, key, 'firstTime');
  }
  return parentKey;
};
//搜索用的
const getSearchKey = (key, tree) => {
  let parentKey;
  for (let i = 0; i < tree.length; i++) {
    const node = tree[i];
    if (node.children) {
      if (node.children.some(item => item.id === key)) {
        parentKey = node.id;
      } else if (getSearchKey(key, node.children)) {
        parentKey = getSearchKey(key, node.children);
      }
    } else {
      if (node.id === key) {
        parentKey = node.id;
      }
    }
  }
  return parentKey;
};

@connect(({ commodity, loading, menu }) => ({
  commodity,
  loading: loading.effects['commodity/getTree'],
  menu,
}))
class OrderTree extends Component {
  constructor(props) {
    super(props);
    this.state = {
      expandedKeys: [], //默认展开一级根节点 props.commodity.defaultParentIdList
      searchValue: '',
      autoExpandParent: true,
    };
  }
  componentDidMount() {
    const { dispatch } = this.props;
    this.props.treeRef && this.props.treeRef(this); //挂载时把整个tree组件传给父组件
    dispatch({
      type: 'commodity/getTree',
      callback: res => {
        this.generateList(res.data);
        const defaultParentIdList = res.data.map(item => item.id);
        this.setState({
          expandedKeys: defaultParentIdList,
        });
      },
    });
  }
  generateList = data => {
    const { dispatch } = this.props;
    for (let i = 0; i < data.length; i++) {
      const node = data[i];
      const { id, name } = node;
      dataList.push({ id, name });
      dispatch({
        type: 'commodity/save',
        payload: {
          dataList,
        },
      });
      if (node.children) {
        this.generateList(node.children);
      }
    }
  };

  //展开/收起节点时触发
  onExpand = expandedKeys => {
    this.setState({
      expandedKeys,
      autoExpandParent: true,
    });
  };
  //点击树节点时触发
  onSelect = (selectKeys, e) => {
    const { dispatch } = this.props;
    const {
      commodity: { treeData },
    } = this.props;
    let arrKeys = {};
    //只有节点选中了才执行代码 dataRef是自定义在TreeNode上添加的属性，可以获取当前节点的所有信息
    if (e.selected && e.node.props.dataRef.param !== 'categoryId') {
      keysObj = {};
      firstParentKey = {};
      arrKeys = getParentKey(selectKeys, treeData);
    } else if (e.selected && e.node.props.dataRef.param === 'categoryId') {
      keysObj = {};
      firstParentKey = {};
      arrKeys = {
        categoryId: e.node.props.dataRef.paramId,
      };
    } else if (!e.selected) {
      return false;
    }
    this.props.idObject(arrKeys);
  };
  // 搜索功能
  onChange = e => {
    const { value } = e.target;
    const {
      commodity: { treeData, dataList, defaultParentIdList },
    } = this.props;
    let expandedKeys = [];
    if (value) {
      expandedKeys = dataList
        .map(item => {
          if (item.name.toLowerCase().indexOf(value.toLowerCase()) > -1) {
            //不区分大小写
            return getSearchKey(item.id, treeData);
          }
          return null;
        })
        .filter((item, i, self) => item && self.indexOf(item) === i);
      this.setState({
        expandedKeys,
        searchValue: value,
        autoExpandParent: true,
      });
    } else {
      this.setState({
        expandedKeys: defaultParentIdList,
        searchValue: '',
        autoExpandParent: true,
      });
    }
  };

  render() {
    const { searchValue, expandedKeys, autoExpandParent } = this.state;
    const {
      commodity: { treeData },
      loading,
    } = this.props;
    const loop = data =>
      data.map(item => {
        const index = item.name.toLowerCase().indexOf(searchValue.toLowerCase()); //忽略大小写
        const beforeStr = item.name.substr(0, index);
        const afterStr = item.name.substr(index + searchValue.length);
        const centerStr = item.name.substr(index, searchValue.length);
        const title =
          index > -1 ? (
            <span title={item.name}>
              {beforeStr}
              <span style={{ color: '#f50' }}>{centerStr}</span>
              {afterStr}
            </span>
          ) : (
            <span title={item.name}>{item.name}</span>
          );
        if (item.children) {
          return (
            <TreeNode key={item.id} title={title} dataRef={item}>
              {loop(item.children)}
            </TreeNode>
          );
        }
        return <TreeNode key={item.id} title={title} dataRef={item} />;
      });
    return (
      <Spin spinning={loading}>
        <div>
          <Search style={{ marginBottom: 8 }} placeholder="Search" onChange={this.onChange} />
          <Tree
            onExpand={this.onExpand}
            onSelect={this.onSelect}
            expandedKeys={expandedKeys}
            autoExpandParent={autoExpandParent}
          >
            {loop(treeData)}
          </Tree>
        </div>
      </Spin>
    );
  }
}

export default OrderTree;

父组件index.js代码：

import React, { Component } from 'react';
import { connect } from 'dva';
import { formatMessage, FormattedMessage } from 'umi/locale';
import { Card, Spin } from 'antd';
import PageHeaderWrapper from '@/components/PageHeaderWrapper';
import OrderForm from './components/form';
import OrderTable from './components/table';
import OrderTree from './components/tree';
import style from './style.less';
import { consoleTestResultHandler } from 'tslint/lib/test';

// let dataList = [];

@connect(({ commodity, loading, menu }) => ({
  commodity,
  loading: loading.effects['commodity/getTree'],
  menu,
}))
class OrderPage extends Component {
  constructor() {
    super();
    this.state = {
      idObject: {},
      reactFlag: false,
    };
  }
  componentDidMount() {
    const { dispatch } = this.props;
    dispatch({
      type: 'commodity/getGoodsCategory',
    });
  }
  onRef = ref => {
    this.orderForm = ref;
  };
  treeRef = ref => {
    this.orderTree = ref;
  };
  getIdObject = data => {
    this.setState(
      {
        idObject: data,
      },
      () => {
        this.orderForm.props.form.setFieldsValue({
          categoryIds: [String(data.categoryId)],
        });
        this.orderForm.inquery(data);
      }
    );
  };
  //判断是否点击重置按钮
  isReact = ref => {
    const {
      commodity: { defaultParentIdList },
    } = this.props;
    if (ref) {
      this.orderTree.setState({
        expandedKeys: defaultParentIdList,
      });
    }
  };

  render() {
    return (
      <PageHeaderWrapper logo>
        <Card bordered={false} title="商品SPU列表" className={style.antCardBox}>
          <div
            style={{ width: '350px', marginRight: '30px', boxShadow: '3px -3px 6px 0px #ccc6' }}
            className={style.antTreeBox}
          >
            <OrderTree idObject={this.getIdObject} treeRef={this.treeRef} />
          </div>
          <div style={{ flex: '1' }}>
            <OrderForm onRef={this.onRef} isReact={this.isReact} />
            <OrderTable />
          </div>
        </Card>
      </PageHeaderWrapper>
    );
  }
}

export default OrderPage;

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