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-treeli.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-modaltitle="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-paneforceRenderv-for="(group, index) in permissionList":key="index + 1":tab="group.displayName"><a-treeref="permissionTree"v-model="group.value"checkablecheckStrictly: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-treeli.ant-tree-treenode-disabled> .ant-tree-node-content-wrapper> span {color: rgba(0, 0, 0, 0.65) !important;
}
</style>