Angularjs 实现动态添加控件功能

<div ng-repeat="item in DATA.data"> 
    <div class="form-group"> 
    <div class="col-md-12"> 
      <label class="col-md-1" >{{$index + 1}}</label> 
      <div class="col-md-9"><input type="text" class="form-control" ng-model="item.value" name="item{{$index + 1}}" /></div> 
      <div><input type="button" ng-click="item.delete($index)" value="删除"></div> 
    </div> 
    </div> 
</div 
<div><input type="button" ng-click="add()" value="增加"></div> 

testModule.controller('testController', 
   function ($scope, $log) { 
     $scope.DATA = new Object(); 
     $scope.DATA.data = [{key: 0, value: ""}]; 
    // add 
     $scope.add = function($index) {         
       // 用时间戳作为每个item的key        
       $scope.DATA.data.splice($index + 1, 0,{key: new Date().getTime(), value: ""});    
     } 
     // delete 
     $scope.DATA.delete = function($index) {      
      $scope.DATA.data.splice($index, 1); 
    } 
});