Angular directive递归实现目录树结构代码实例

时间：2021-05-28

整理文档，搜刮出一个Angular directive递归实现目录树结构代码实例代码，稍微整理精简一下做下分享。

效果图：

重点：

1. 整棵目录树的实现，通过嵌套完成，主要在于对treeItem.html的递归使用

<script type="text/ng-template" id="treeView.html"> <ul> <li ng-repeat="item in treeData.children" ng-include="'treeItem.html'"></li> </ul> </script> <script type="text/ng-template" id="treeItem.html"> <span class="color-indictor" ng-class="{'leaf-node': isLeaf(item), 'expand-node': !isLeaf(item) && item.isExpand, 'unexpand-node': !isLeaf(item) && !item.isExpand}" ng-click="toggleExpandStatus(item)"></span> <span>{{item.name}}</span> <ul ng-if="!isLeaf(item)" ng-show="item.isExpand"> <li ng-repeat="item in item.children" ng-include="'treeItem.html'"></li> </ul> </script>

2. 点击展开/关闭目录树

通过ng-show对item.expand进行判断，点击item时切换其expand参数，完成目录树的打开与关闭

3. 源码

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.9/angular.js"></script><script>angular.module("treeApp", []).controller("treeController", function($scope){ $scope.jsonData = { name: 'menu', children: [{ name: 'A', children: [{ name: 'A.1', children: [{ name: 'A.1.1', children: [] }] },{ name: 'A.2', children: [{ name: 'A.2.1', children: [{ name: 'A.2.1.1', children: [] }] },{ name: 'A.2.2', children: [] }] }] },{ name: 'B', children: [{ name: 'B.1', children: [] },{ name: 'B.2', children: [] }] },{ name: 'C', children: [] }] };}).directive('treeView', function(){ return { restrict: 'E', templateUrl: 'treeView.html', scope: { treeData: '=' }, controller: function($scope){ $scope.isLeaf = function(item){ return !item.children || !item.children.length; }; $scope.toggleExpandStatus = function(item){ item.isExpand = !item.isExpand; }; } };});</script><style>ul{ list-style: none;}.color-indictor{ display: inline-block; width: 20px; height: 20px; cursor: pointer;}.color-indictor.leaf-node{ background: red;}.color-indictor.unexpand-node{ background: green;}.color-indictor.expand-node{ background-color: yellow;}</style><body ng-app="treeApp" ng-controller="treeController"> <div> <p>Introduce: Click green block expand the menu tree</p> <p>Red: Leaf node, can not click</p> <p>Green: Unexpand node, click to expand menu</p> <p>Yellow: Expanded node, click to unexpand menu</p> </div> <tree-view tree-data="jsonData"></tree-view></body><script type="text/ng-template" id="treeView.html"> <ul> <li ng-repeat="item in treeData.children" ng-include="'treeItem.html'"></li> </ul></script><script type="text/ng-template" id="treeItem.html"> <span class="color-indictor" ng-class="{'leaf-node': isLeaf(item), 'expand-node': !isLeaf(item) && item.isExpand, 'unexpand-node': !isLeaf(item) && !item.isExpand}" ng-click="toggleExpandStatus(item)"></span> <span>{{item.name}}</span> <ul ng-if="!isLeaf(item)" ng-show="item.isExpand"> <li ng-repeat="item in item.children" ng-include="'treeItem.html'"></li> </ul></script>

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