Angular directive递归实现目录树结构代码实例

时间:2020-05-15 老王今天没吃药人气:0

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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