angular 跳转返回上一页

HTML中
<script src="lib/angular/angular-1.4.9/angular.js"></script>  
  <script src="lib/angular/angular-ui-router.min.js"></script> 

　　app中

 angular.module('ConsoleUIApp', ['ui.router','ui.bootstrap'])  
        .config(function ($stateProvider, $urlRouterProvider, $httpProvider) {  

            // For any unmatched url, redirect to /state1  
            $urlRouterProvider.otherwise("/home");  

            $stateProvider  
                .state('home', {  
                    url: "/home",  
                    templateUrl: "views/home.html",  
                    controller: 'HomeCtrl'  
                })  
                .state('testing', {  
                    url: "/testing",  
                    templateUrl: "views/testing.html",  
                    controller: 'TestingCtrl'  
                })  
        })  

        .run(function($rootScope, growl, $state, $stateParams) {  
            $rootScope.$state = $state;  
            $rootScope.$stateParams = $stateParams;  
            $rootScope.$on("$stateChangeSuccess",  function(event, toState, toParams, fromState, fromParams) {  
                // to be used for back button //won't work when page is reloaded.  
                $rootScope.previousState_name = fromState.name;  
                $rootScope.previousState_params = fromParams;  
            });  
            //back button function called from back button's ng-click="back()"  
            $rootScope.back = function() {//实现返回的函数  
                $state.go($rootScope.previousState_name,$rootScope.previousState_params);  
            };  
        });  

controller：

 $scope.sub = function(addRode) {  
    $rootScope.back()//直接使用  
    } 

第二种方法：

window.history.back()