关于antd tree 和父子组件之间的传值问题(react 总结)
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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