红色字体为参考文档 

参考地址:

https://my.oschina.net/u/264284/blog/3085348 

网上找的demo

https://blog.csdn.net/ZYS10000/article/details/116402784

楼上git下载地址 

https://gitee.com/zhengyis/vue-element-tree-plus

 

 cnpm安装

cnpm install babel-plugin-syntax-jsx babel-plugin-transform-vue-jsx babel-helper-vue-jsx-merge-props babel-preset-env --save-dev

npm安装 

npm install babel-plugin-syntax-jsx babel-plugin-transform-vue-jsx babel-helper-vue-jsx-merge-props babel-preset-env --save-dev

.babelrc文件下新增 

"transform-vue-jsx","transform-runtime"

 

 

<template>
 <div>
  <div class="exam_structure">
   <el-input
    placeholder="输入关键字进行过滤"
    v-model="filterText">
   </el-input>
 
 
   <el-button type="primary" size="small" class="add_new_question" @click="add_new_question"><i></i>添加父节点</el-button>
 
  </div>
 
  <div class="question_info_lists">
 
   <el-tree ref="tree" :key="tree_key" :data="treeData" node-key="id" :render-content="renderContent"
        :expand-on-click-node="false" :default-expanded-keys="defaultExpand" show-checkbox
        :filter-node-method="filterNode"></el-tree> 
 
   <el-row class="add_question" v-show="add_question_flag">
 
    <el-col :span="12">
 
     <el-input v-model="new_question_name" placeholder="请输入大题名称"></el-input>
 
    </el-col>
 
    <el-col :span="12">
 
     <el-button size="mini" class="btn_sure" @click.stop="add_question_sure">确定</el-button>
 
     <el-button size="mini" class="btn_cancel" @click.stop="add_question_cancel">取消</el-button>
 
    </el-col>
 
   </el-row>
 
  </div>
 </div>
</template>
 
<script>
 export default {
  name: "tree1",
 
  watch: {
   filterText(val) {
    this.$refs.tree.filter(val);
   }
  }, 
 
  methods: {
   filterNode(value, data) {
    if (!value) return true;
    return data.label.indexOf(value) !== -1;
   },
// 添加新大题
 
   add_new_question() { 
    this.add_question_flag = true 
   },
 
   add_question_sure() {  //确定
 
    const nodeObj = {id: '', label: this.new_question_name, isEdit: false, children: []}
    this.treeData.push(nodeObj)
    this.add_question_flag = false
 
   },
 
   add_question_cancel() {  //取消 
    this.add_question_flag = false 
    this.new_question_name = '' 
   },
 
   //   增加
   append(store, node, data) {
    var maxid = '20'
    //新增数据
    const nodeapp = {id: ++maxid, label: '增加节点', isEdit: false, children: []}
    data.children.push(nodeapp)
    if (!node.expanded) {
     node.expanded = true
    }
    const parent = node.parent
    const children = parent.data
    const cIndex = children.findIndex(d => d.id === data.id)
    const tempChildrenNodex2 = children[cIndex] //拿到被添加的上一级
    console.log(tempChildrenNodex2.children[cIndex - 1])
   },
 
// 修改
 
   nodeEdit(ev, store, data) { 
    data.isEdit = true 
    this.$nextTick(() => { 
     const $input = ev.target.parentNode.parentNode.querySelector('input') || ev.target.parentElement.parentElement.querySelector('input') 
 
     !$input ? '' : $input.focus() 
    }) 
   },
 
   edit_sure(ev, data) { 
    const $input = ev.target.parentNode.parentNode.querySelector('input') || ev.target.parentElement.parentElement.querySelector('input') 
 
    if (!$input) { 
     return false 
    } else { 
     data.label = $input.value 
     data.isEdit = false 
    } 
   },
 
// 节点删除 
   nodeDelete(node, data) { 
    const parent = node.parent 
    const children = parent.data.children || parent.data 
    const index = children.findIndex(d => d.id === data.id) 
    children.splice(index, 1) 
   },
 
// 节点上移
 
   nodeUp(node, data) { 
    const parent = node.parent 
    const children = parent.data.children || parent.data 
    const cIndex = children.findIndex(d => d.id === data.id) 
    if (parent.level === 0 && cIndex === 0) { 
     return 
    } else if (parent.level !== 0 && cIndex === 0) { //不同父节点中移动
     alert('不同父节点中移动')
 
     // const parent2 = parent.parent 
     // const children2 = parent2.data.children || parent2.data 
     // const pIndex2 = parseInt(children2.findIndex(p => p.id === parent.data.id), 10) - 1 
 
     // if (pIndex2 < 0) return 
     // children2[pIndex2].children.push(data) 
     // children.splice(cIndex, 1)
 
     // this.defaultExpand[0] = children2[pIndex2].id
 
    } else if ((parent.level === 0 && cIndex !== 0) || (parent.level !== 0 && cIndex !== 0)) {
 
     const tempChildrenNodex1 = children[cIndex - 1] 
     const tempChildrenNodex2 = children[cIndex] 
     this.$set(children, cIndex - 1, tempChildrenNodex2) 
     this.$set(children, cIndex, tempChildrenNodex1) 
     this.defaultExpand[0] = data.id 
    }
 
    this.tree_key++ 
   },
 
// 节点下移
 
   nodeDown(store, node, data) { 
    const parent = node.parent
    const children = parent.data.children || parent.data
    const cIndex = children.findIndex(d => d.id === data.id)
    const cLength = children.length - 1 // 最边上的节点
    const allLevel = store.data.length - 1 // 树的深度 
 
    if (parent.level === allLevel && cIndex === cLength) { // 最最末的节点
 
     return
 
    } else if (parent.level !== allLevel && cIndex === cLength) { //父节点不同
     alert('不能移动')
     // const parent2 = parent.parent
 
     // const children2 = parent2.data.children || parent2.data
 
     // const pIndex2 = parseInt((children2.findIndex(p => p.id === parent.data.id)), 10) 
 
     // if (pIndex2 === allLevel) return
 
     // children2[pIndex2 + 1].children.push(data)
 
     // children.splice(cIndex, 1)
 
     // this.defaultExpand[0] = children2[pIndex2 + 1].id
 
    } else if ((parent.level === allLevel && cIndex !== cLength) || (parent.level !== allLevel && cIndex !== cLength)) { // 父节点相同
 
     const tempChildrenNodex1 = children[cIndex + 1] 
     const tempChildrenNodex2 = children[cIndex] 
 
     this.$set(children, cIndex + 1, tempChildrenNodex2) 
     this.$set(children, cIndex, tempChildrenNodex1) 
     this.defaultExpand[0] = data.id 
    } 
    this.tree_key++ 
   },
 
   showOrEdit(data) { 
    if (data.isEdit) { 
     return <input type="text" value={data.label} on-blur={ev => this.edit_sure(ev, data)}/> 
    } else { 
     return <span className="node_labe">{data.label}</span> 
    } 
   },
 
// 结构树操作group node, 
   renderContent(h, {node, data, store}) { 
    return ( 
     <span> 
<span class="el-icon-document"> 
{this.showOrEdit(data)} 
</span> 
<div class="tree_node_op" style=" float: right"> 
<i class="el-icon-edit" on-click={(ev) => this.nodeEdit(ev, store, data)}></i> 
<i class="el-icon-delete" on-click={() => this.nodeDelete(node, data)}></i> 
<i class="el-icon-upload2" on-click={() => this.nodeUp(node, data)}></i> 
<i class="el-icon-download" on-click={() => this.nodeDown(store, node, data)}></i>
<i class="el-icon-plus" on-click={() => this.append(store, node, data)}></i>
 
</div> 
</span>) 
   } 
  }
  , data() { 
   return {
    filterText: '',
    treeData: [{
 
     id: 1, 
     label: '一级 1', 
     isEdit: false, 
     children: [{ 
      id: 4, 
      label: '二级 1-1', 
      isEdit: false, 
      children: [{id: 9, label: '三级 1-1-1', isEdit: false, children: []}, {
       id: 10,
       label: '三级 1-1-2',
       isEdit: false,
       children: []
      }, {
       id: 11,
       label: '三级 1-1-3',
       isEdit: false,
    children: []
      }] 
     },
 
      { 
       id: 12, 
       label: '二级 1-2', 
       isEdit: false, 
       children: [] 
      },
 
      { 
       id: 13, 
       label: '二级 1-3', 
       isEdit: false, 
       children: [] 
      }] 
    },
 
     { 
      id: 2, 
      label: '一级 2', 
      isEdit: false,
       children: [{id: 5, label: '二级 2-1', isEdit: false, children: []}, {
       id: 6,
       label: '二级 2-2',
       isEdit: false,
       children: []
      }] 
     },
 
     { 
      id: 3, 
      label: '一级 3', 
      isEdit: false, 
      children: [
       {id: 7, label: '二级 3-1', isEdit: false, children: []},
       {
       id: 8,
       label: '二级 3-2',
       isEdit: false,
       children: []
      }] 
     }],
 
    add_question_flag: false, 
    new_question_name: '', 
    tree_key: 0, 
    defaultExpand: [] 
   } 
  }, 
 }
</script> 
<style scoped> 
</style>