用按钮控制排序

用按钮控制排序（或者说控制器中如何使用过滤器）

思想：按钮控制肯定是ng-click触发
（js访问的变量都是往上找的)项控制器中注入$filter过滤器

<script >
       var app=angular.module('test',[])
       app.controller('con1',function($scope,$http,$filter){
             $scope.date=[
               {id:1,name:'xssssssss'},
               {id:52,name:'apple'},
               {id:44,name:'pear'},
               {id:12,name:"orange"}
             ]
             $scope.orderby=function(){
               $scope.date=$filter('orderBy')($scope.date,'id',true)
             }
       })
     </script>

$scope.orderby=function(field){
               $scope.date=$filter('orderBy')($scope.date,field,参数3)
             }
             只要能动态切换低三个参数就ok，默认false