最近在写后台管理系统的时候，遇到一个需求：就是权限管理，一般权限管理根据功能分类，是会分不同级别的。

效果图如下：

今天后端提了一个需求，如下：就是无论是哪一层的父级节点，都不展示选择框，仅仅当作一个折叠项目展示。

原话：这一层权限能改成不需要勾选么？就当个分组用

最终的效果图如下：

解决思路：

1.判断哪些是父节点，给父节点添加disabled属性——this.permissionList是数据源

通过递归的方法来判断是否是父节点。

filterMenuList(arr, item) {
  arr.forEach((child) => {
    if (child.children && child.children.length > 0) {
      child.disabled = true;
      child = this.filterMenuList(child.children, item);
    }
  });
  return item;
},

使用递归方法：

this.permissionList.forEach((item) => {
  if (item.permissions && item.permissions.length > 0) {
    item = this.filterMenuList(item.permissions, item);
  }
});

通过上面的方法，可以给父节点添加disabled为true的属性了。

2.通过css样式来处理disabled的父节点

/deep/li.ant-tree-treenode-disabled
  > span.ant-tree-checkbox.ant-tree-checkbox-disabled {
  display: none !important;
}
/deep/
  .ant-tree
  li.ant-tree-treenode-disabled
  > .ant-tree-node-content-wrapper
  > span {
  color: rgba(0, 0, 0, 0.65) !important;
}

3.完整代码如下：

<template>
  <a-modal
    title="编辑API权限"
    :visible.sync="visible"
    :width="800"
    :maskClosable="true"
    @cancel="handleClose"
    @ok="handleSubmit"
  >
    <div id="topId"></div>
    <a-tabs tab-position="left">
      <a-tab-pane
        forceRender
        v-for="(group, index) in permissionList"
        :key="index + 1"
        :tab="group.displayName"
      >
        <a-tree
          ref="permissionTree"
          v-model="group.value"
          checkable
          checkStrictly
          :defaultExpandAll="true"
          :treeData="group.permissions"
          :replaceFields="replaceFields"
          @check="onCheck($event, group)"
        >
        </a-tree>
      </a-tab-pane>
    </a-tabs>
  </a-modal>
</template>
<script>
import { putApiPermission } from '@/services/menu';
export default {
  name: 'addPermissionList',
  components: {},
  data() {
    return {
      visible: false,
      loadLoading: false,
      permissionList: [],
      id: undefined,
      replaceFields: {
        value: 'permissionName',
        title: 'displayName',
        children: 'children',
        key: 'permissionName',
      },
      menuRoteIds: [],
    };
  },
  methods: {
    onCheck(obj, item) {
      item.value = obj.checked || [];
      this.$forceUpdate();
    },
    handleShow(row, permissionList) {
      this.visible = true;
      this.id = row.id;
      this.permissionList = [...permissionList];
      this.menuRoteIds = [...row.permissionNames];
      this.permissionList.forEach((item) => {
        item.value = [];
        if (this.menuRoteIds.includes(item.groupName)) {
          item.value.push(item.groupName);
        }
        if (item.permissions && item.permissions.length > 0) {
          item = this.filterMenuList(item.permissions, item);
        }
      });
      this.$nextTick(() => {
        document.getElementById('topId').scrollIntoView(true);
      });
    },
    filterMenuList(arr, item) {
      arr.forEach((child) => {
        if (this.menuRoteIds.includes(child.permissionName)) {
          item.value.push(child.permissionName);
        }
        if (child.children && child.children.length > 0) {
          child.disabled = true;
          child = this.filterMenuList(child.children, item);
        }
      });
      return item;
    },
    handleClose() {
      this.visible = false;
    },
    handleSubmit() {
      let arr = [];
      this.permissionList &&
        this.permissionList.forEach((item) => {
          arr = arr.concat(item.value);
        });
      let params = {
        permissionNames: arr || [],
      };
      this.loadLoading = true;
      putApiPermission(this.id, params)
        .then(() => {
          this.$message.success('保存成功');
          this.$emit('ok');
          this.handleClose();
        })
        .finally(() => {
          this.loadLoading = false;
        });
    },
  },
};
</script>
<style scoped>
/deep/.ant-modal-body {
  height: 500px;
  overflow-y: auto;
}
/deep/li.ant-tree-treenode-disabled
  > span.ant-tree-checkbox.ant-tree-checkbox-disabled {
  display: none !important;
}

/deep/
  .ant-tree
  li.ant-tree-treenode-disabled
  > .ant-tree-node-content-wrapper
  > span {
  color: rgba(0, 0, 0, 0.65) !important;
}
</style>