我是Angular和ui路由器的新手。当某人选择一个模型并且我的控制器执行标准的SHOW方法时，我只想更新URL以包括模型的ID，而无需刷新页面，然后继续原始视图。我不确定该怎么做…

$stateProvider
        .state('citylist', {
          url: "/",
          templateUrl: "views/index.html"
        })
        .state('cityshow', {
          url: "/city/:id",
          templateUrl: "views/index.html"
        })

angular.module('app.system').controller('IndexController', ['$scope', 'Global', 'Cities', '$stateParams', '$location', function ($scope, Cities, $stateParams, $location) {

    $scope.loadTown = function(id) {
        Cities.get({id: id }, function(city) {
             $scope.city = city
             // Change URL
             // Do things within the same view...
        });
    };
});

<button ng-click="loadTown(123456)">Chicago</button>