antd tree渲染问题
首页 > >    作者:lininn   2019年8月8日 22:03 星期四   热度:4415°   百度已收录  
时间:2019-8-8 22:03   热度:4415° 
需求如下,当页面初始化后加载一级目录,当点击一级目录展开相应的子集,当右击添加一级目录时候,原来的结构不变,实现如下:
点击时候将loadedKeys记录,当重新加载一级目录时候,将loadedKeys清空,完成需求

import React from 'react';
import { Tree,Spin,message} from 'antd';
import {getTree,delateLevel} from '../../axios/manageGoods'
const { TreeNode ,DirectoryTree } = Tree;

class MyTree extends React.Component {
  state = {
    treeData: [],
    show:false,
    loading:false,
    rightClickNodeTreeItem:{},
    loadedKeys:[]
  };
constructor(props,context){
    super(props);
   
}
toggleLoading=value=>{
  this.setState({
    loading:value
  })
}
initData(){
  this.toggleLoading(true);
  getTree({"level":1}).then(res=>{
    this.toggleLoading(false);
    var arr=[];
    res.map(item=>{
      arr.push({
          ...item,
          key:item.catId,
          title:item.catName
      })
    })
    this.setState({
        "treeData":arr,
        loadedKeys:[]
    })
})
}
componentDidMount(){
  this.initData();
  this.props.onRef(this);
    document.addEventListener('click',e=>{
      this.setState({
        show:false
    })
    e.stopPropagation();
    });
}
componentWillUnmount(){
    document.removeEventListener('click');
}
  onLoadData = treeNode =>
    new Promise(resolve => {
      if (treeNode.props.children) {
        console.log("chil",treeNode.props.children)
        resolve();
        return;
      }
      console.log("chil",treeNode.props.children)
      getTree({
        catId: treeNode.props.dataRef.catId,
        level: parseInt(treeNode.props.dataRef.catLevel)+1
      }).then(res=>{
       
          var arr=[];
          res.map(item=>{
              if(item["catLevel"]==="3"){
                  arr.push({
                      ...item,
                      key:item.catId,
                      title:item.catName,
                      isLeaf:true
                  })
              }else{
                  arr.push({
                      ...item,
                      key:item.catId,
                      title:item.catName
                  })
              }
           
          })
          treeNode.props.dataRef.children=arr;
          this.setState({
              treeData: [...this.state.treeData],
            });
        
        
          resolve();
      })
     
      console.log(treeNode);
    });

  renderTreeNodes = data=>
  data.map(item => {
      if (item.children) {
        return (
          <TreeNode title={item.title} key={item.key} dataRef={item}>
            {this.renderTreeNodes(item.children)}
          </TreeNode>
        );

      }
      return <TreeNode {...item} dataRef={item} />;
    });
    getNodeTreeRightClickMenu = () => {
        console.log(this.state.rightClickNodeTreeItem);
        const { pageX, pageY, } = { ...this.state.rightClickNodeTreeItem };
        const tmpStyle = {
          position: "absolute",
          zIndex:999,
          left: `${pageX-210}px`,
          top: `${pageY-150}px`
        };
        const menu = (
          <div style={tmpStyle} className="self-right-menu">
           {this.state.rightClickNodeTreeItem["dataRef"]["isLeaf"]?(<div> <a>分类参数</a></div>):(<div> <a>添加</a></div>)} 
            
             <div> <a>重命名</a></div>
             <div onClick={this.delateCat.bind(this)}> <a href="javascript:;">删除</a></div>
          </div>
        );
        return menu;
      };
      
  render() {
   
    return(
      <Spin spinning={this.state.loading} size="large" tip="加载中...">
        <div>
        {
         //loadedKeys={[]}
        }
         {this.state.treeData? <DirectoryTree  
          loadData={this.onLoadData} 
          onLoad={loadedKeys=>{
               this.setState({
                loadedKeys:loadedKeys
               },()=>{
                 console.log(this.state.loadedKeys);
               })
            }}
          loadedKeys={this.state.loadedKeys}
          onRightClick={this.rightClick.bind(this)}>
          {this.renderTreeNodes(this.state.treeData)}
          </DirectoryTree>:("loading...")}
       { this.state.show?this.getNodeTreeRightClickMenu():""}
        <style>
            {`
            .self-right-menu> div{
                background:#fff;
                padding:10px;
                border-bottom:1px solid #ccc;
            }
            `}
        </style>
     
        </div>
        </Spin>
    )
  }
  cancelRight=e=>{
      this.setState({
        show:false
    })
    e.stopPropagation();
  }
  delateCat=e=>{
    e.stopPropagation();
    delateLevel({"catid":this.state.rightClickNodeTreeItem["dataRef"]["catId"]}).then(res=>{
       console.log(res);  
      if(res["code"]=="0"){
          message.success("删除成功!").then(()=>{
          //  const {history}=this.props;
          //  history.go(0);
          this.initData();
          });
        }else if(res["code"]=="1"){
          message.error("删除失败!此分类有下级目录");
        }else if(res["code"]=="2"){
          message.error("删除失败!类别下存在商品");
        }else{
           message.error("删除失败!类别不存在");
        }
    }).catch(err=>{console.log(err)})
    
  }
  rightClick(e){
    console.log(e.node,e.event.pageX);
    this.setState({
        rightClickNodeTreeItem:{
            ...e.node.props,
            pageX:e.event.pageX,
            pageY:e.event.pageY
        }
    },()=>{
       this.setState({
           show:true
       })
    });
  }
}
export default MyTree;
如果想要实现,初始化一级菜单后所有菜单闭合,恢复原状,可将expandedKeys设置为{this.state.loadedKeys}
二维码加载中...
本文作者:lininn      文章标题: antd tree渲染问题
本文地址:?post=385
版权声明:若无注明,本文皆为“覆手为雨”原创,转载请保留文章出处。
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