项目需求如下：当我点击“编辑”后，需要在tree树上全勾中和半勾中选项，由于后端接口返回的tree树是含了父级节点id的数组集合，所以我们回显时需要处理好这个全勾中和半勾中的问题。

主要思路如下，我们通过setData方法获取详情接口数据，然后调用defaultChecked方法回显，通过控制checkStrictly是否为true来确定父子是否关联，然后通过myTree.setChecked来设置选中的项，如下所示：

    setData(item) {
      getRoleDetail(item.id)
        .then(res => {
          // console.log("角色详情", res);

          this.formData = res.data
          this.formData.checked_menus = res.data.permissions

          this.defaultChecked(res.data.permissions)
        })
    },

    defaultChecked(myData) {
      // 默认选中

      this.searchConfig[2].checkStrictly = true

      let myTree

      setTimeout(() => {
        this.$nextTick(() => {
          myTree = this.$refs.searchForm.$refs.treeRef[0]

          setTimeout(() => {
            myData.forEach(item => {
              myTree.setChecked(item, true, false)
            })
          }, 100)

          this.searchConfig[2].defaultCheckedKeys = myData

          this.searchConfig[2].checkStrictly = false
        })
      }, 200)

      // this.$refs.searchForm.setKeyTree(myData);
    },

当前页面完整代码如下：

<template>
  <div class="search-container">
    <search-form
      ref="searchForm"
      :showSearchButton="false"
      :isShowResetButton="false"
      :formData="formData"
      :rules="rules"
      :isInline="false"
      :searchConfig="searchConfig"
      @checkTree="checkTree"
    />

    <div class="txc">
      <yihen-button-group
        :isShowSaveAdd="!isEdit"
        @saveAdd="addNext"
        @saveForm="submit"
        @handleClose="cancel"
      />
    </div>
  </div>
</template>
<script>
import searchForm from '@/components/search-form'

import { genTree } from '@/libs/utils.js'
import {
  getMenuList,
  getRoleDetail

  // staticDeleteAll
} from '@/api/account.js'
export default {
  components: { searchForm },
  props: {
    currentItem: {
      type: Object,
      default: () => {}
    },
    isEdit: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      formData: {},
      showSeniorForm: false,
      searchConfig: [
        {
          type: 'input',
          label: '角色名称',
          props: 'group_name',
          placeholder: '请输入角色名称',
          labelWidth: 105,
          colSpan: 20
        },

        {
          type: 'textArea',
          label: '角色描述',
          props: 'remark',
          placeholder: '请输入角色描述',
          labelWidth: 105,
          colSpan: 20
        },
        {
          type: 'tree',
          label: '菜单权限',
          props: 'checked_menus',
          placeholder: '请选择菜单',
          nodeKey: 'id',
          checkStrictly: false,
          labelWidth: 105,
          colSpan: 20,
          treeData: [],
          showCheckbox: true,
          defaultProps: {
            children: 'children',
            label: 'permiss_name'
          },
          defaultCheckedKeys: []
        }
      ],
      rules: {
        group_name: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],

        remark: [
          { required: false, message: '请输入角色描述', trigger: 'blur' }
        ],

        checked_menus: [
          {
            required: false,

            message: '请选择菜单',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  watch: {
    currentItem: {
      handler(val) {
        // this.showSeniorForm = false;
        // console.log("回显", val);
        // this.formData = { ...val };
      },
      immediate: true
    }
  },
  created() {
    this.getMenuArr()
  },
  methods: {
    submit() {
      this.$refs.searchForm.validatorForm(data => {
        this.$emit('submit', this.formData)
      })
    },
    cancel() {
      this.$emit('cancel')
    },
    addNext() {
      this.$refs.searchForm.validatorForm(data => {
        this.$emit('addNext', this.formData)
      })
    },

    // 获取菜单下拉
    getMenuArr() {
      const obj = {
        page_size: 9999,
        page: 1,
        permiss_name: ''
      }

      getMenuList(obj)
        .then(res => {
          const routesList = genTree(res.data.list)

          // console.log("routesList", routesList);

          this.searchConfig[2].treeData = routesList
        })
    },

    checkTree(node, data) {
      // this.temp.menuList = data.checkedKeys.concat(data.halfCheckedKeys);
      const selectArr = data.checkedKeys.concat(data.halfCheckedKeys)

      this.formData.checked_menus = selectArr

      // console.log("checkTree", node, data, selectArr);
    },

    setData(item) {
      getRoleDetail(item.id)
        .then(res => {
          // console.log("角色详情", res);

          this.formData = res.data
          this.formData.checked_menus = res.data.permissions

          this.defaultChecked(res.data.permissions)
        })
    },

    defaultChecked(myData) {
      // 默认选中

      this.searchConfig[2].checkStrictly = true

      let myTree

      setTimeout(() => {
        this.$nextTick(() => {
          myTree = this.$refs.searchForm.$refs.treeRef[0]

          setTimeout(() => {
            myData.forEach(item => {
              myTree.setChecked(item, true, false)
            })
          }, 100)

          this.searchConfig[2].defaultCheckedKeys = myData

          this.searchConfig[2].checkStrictly = false
        })
      }, 200)

      // this.$refs.searchForm.setKeyTree(myData);
    },
    resetForm() {
      this.$nextTick(() => {
        this.$refs.searchForm.resetFields()
      })
    }
  }
}
</script>
<style lang="less" scoped>
.senior-setting {
  border-top: 1px solid #e9e9e9;
}
.first-line {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: 20px 0 20px 20px;
  span {
    color: #409eff;
  }
  i {
    color: #409eff;
  }
}
</style>