//数据结构<el-tree ref="tree_edit" :check-strictly="checkStrictly" :data="powerList" :props="defaultProps" :default-expand-all="true" :default-expanded-keys="checkedCities" :default-checked-keys="checkedCities" @check-change="handleClick_edit" show-checkbox node-key="id" class="permission-tree" />powerList: [], //数组
checkList_edit: [],//修改勾选
checkStrictly: false,
defaultProps: {children: 'children',label: 'menuName',
},

编辑回显方法（匹配选中id，接口返回选中id数组）设置选中：

 edit(index) {this.dialogFormVisible_edit = true;this.checkStrictly = true;  //重点：给数节点赋值之前 先设置为truelet menuIds = Array.from(new Set(this.tableData[index].menuButtonIds.split(",")));let intArray = menuIds.map(str => parseInt(str));console.log(intArray);API.GetMenu({}).then(res => {if (res.code == 200) {this.roleform_edit.id = this.tableData[index].id;this.roleform_edit.status = this.tableData[index].status;this.roleform_edit.roleName = this.tableData[index].roleName;this.roleform_edit.remark = this.tableData[index].remark;this.$nextTick(() => {this.powerList = res.data;this.checkedCities = intArray;//回显this.$refs.tree_edit.setCheckedKeys(intArray, true)this.checkStrictly = false //重点： 赋值完成后 设置为false})//简单方法/*this.$nextTick(() => {let arr=[];this.powerList.forEach(item=>{if(!this.$refs.tree_edit.getNode(item.id).childNodes || !this.$refs.tree_edit.getNode(item.id).childNodes.length){arr.push(item.id)}})this.$refs.tree_edit.setCheckedKeys(arr);})*/} else {return false;}})},

再次勾选方法（以原数据结构获取选中数据）：

handleClick_edit(data, checked, node) {if (checked) {let childNode = this.$refs.tree_edit.getCheckedKeys();//返回选中子节点的key   let parentNode = this.$refs.tree_edit.getHalfCheckedKeys();//返回选中父节点的key   let checkedAll = childNode.concat(parentNode);this.checkList_edit = this.treeFilter(this.powerList, node => checkedAll.includes(node.id))console.log(this.checkList_edit)}},
//递归匹配treeFilter(tree, func) {return tree.map(node => ({ ...node })).filter(node => {node.children = node.children && this.treeFilter(node.children, func)return func(node) || (node.children && node.children.length)})},