Angularjs：$scope.emit不起作用

我是 angularjs的新手,我正在创建一个Web应用程序来赚取经验和实践.我的问题是$scope.$emit似乎没有工作,我正在寻找方法来联系控制器之间的功能,到目前为止,我已经在互联网上发现$scope.emit和$scope.on似乎适合对于这种任务,如果有另一种方式,我想知道,无论如何代码是这样编写的：

loginController.js

(function(angular)
{
    var app = angular.module('Organizer');

    // inject $scope to the controller in order to try $scope.$emit
    app.controller('login',function($http,$scope)
    {
        // i define the scope like this so i can access inside other functions
        var scope = this;
        scope.processing = false;
        scope.message = null;

        scope.submit = function()
        {
            scope.processing = true;

            // store data for post
            var post = {
                username: scope.username,password: scope.password
            };

            // send post data
            $http.post('api/default/login',post).
                success(function(data,status)
                {
                    // hide processing feedback and show the result
                    scope.processing = false;
                    scope.message = data.message;
                }).
                error(function(data,status)
                {
                    scope.processing = false;
                });
        };

        // Function i use to emit
        this.closeDialog = function()
        {
            $scope.$emit('closeDialog');
        };
    });
})(angular);

siteController.js

(function(angular)
{
    var app = angular.module('Organizer');

    app.controller('site',function($mdDialog,$scope)
    {
        this.menu = ['test1','test2'];

        this.dialog = function()
        {
            $mdDialog.show({
                templateUrl: 'site/login',});
        };

        // this does not seem to be working
        $scope.$on('closeDialog',function(event)
        {
            console.log('close dialog');
        });
    });
})(angular);

注意：我正在使用角度材料,你可以看到我正在显示一个登录对话框,登录有它的控制器(我希望它使用相同的站点控制器,但我不知道如何),这个对话框有一个在loginControler中调用函数closeDialog()并且应该关闭对话框的按钮,但是现在出于测试原因我只是记录它是否正在调用该事件

$rootScope.$broadcast('myEvent');