//angularjs 在指令中通过dom修改input 的Value值同时更新model
obj.directive('test',['$parse',function ($parse) {
  var dateFilter = $filter('date');
  return {
    require: 'ngModel',link: function (scope,element,attrs,ctrl) {
		 element[0].value ="Your data";
		 //更新模型
		 $parse(attrs['ngModel']).assign(scope,element[0].value);
	}
  };
}]);