Angular directive递归实现目录树结构代码实例

2019-11-19 16:39:51

字体：大中小

来源：转载

供稿：网友

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>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。

上一篇：Vue中使用vux的配置详解

下一篇：微信小程序开发图片拖拽实例详解