<!DOCTYPE html>

 <html data-ng-app="App">

 <head>

     <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js"></script>

     <script src="script2.js"></script>

 </head>

 <body data-ng-controller="AddStyleCtrl">

     <div>Choose Tags</div>

     <div>

         <div>You have choosen:</div>

         <hr>

         <label data-ng-repeat="selectedTag in selectedTags">

             (({{selectedTag}}))

         </label>

         <hr>

         <div data-ng-repeat="category in tagcategories">

             <div>{{ category.name }}</div>

             <div data-ng-repeat="tag in category.tags">

                 <div>

                     <input type="checkbox" id={{tag.id}} name="{{tag.name}}" ng-checked="isSelected(tag.id)" ng-click="updateSelection($event,tag.id)">

                     {{ tag.name }}

                 </div>

             </div>

             <hr>

         </div>

     </div>

 <pre>{{selected|json}}</pre>

 <pre>{{selectedTags|json}}</pre>

 </body>

 </html>

 var iApp = angular.module("App", []);

 iApp.controller('AddStyleCtrl', function($scope)

 {

     $scope.tagcategories = [

         {

             name: 'Color',

             tags: [

                 {

                     id:1,

                     name:'color1'

                 },

                 {

                     id:2,

                     name:'color2'

                 },

                 {

                     id:3,

                     name:'color3'

                 },

                 {

                     id:4,

                     name:'color4'

                 },

             ]

         },

         {

             name:'Cat',

             tags:[

                 {

                     id:5,

                     name:'cat1'

                 },

                 {

                     id:6,

                     name:'cat2'

                 },

             ]

         },

         {

             name:'Scenario',

             tags:[

                 {

                     id:7,

                     name:'Home'

                 },

                 {

                     id:8,

                     name:'Work'

                 },

             ]

         }

     ];

     $scope.selected = []; 

     $scope.updateSelection = function($event, id){

         var checkbox = $event.target;

         var action = (checkbox.checked?'add':'remove');//这里有点奇怪 相反了

         if(action == 'add' && $scope.selected.indexOf(id) == -1){

             $scope.selected.push(id);

         }

         if(action == 'remove' && $scope.selected.indexOf(id)!=-1){

             var idx = $scope.selected.indexOf(id);

             $scope.selected.splice(idx,1);

         }

     }

     $scope.isSelected = function(id){

         return $scope.selected.indexOf(id)>=0;

     }

 });