AngularJs 父子级Controller传递数据

HTML代码

<div ng-controller="MyAccountCtrl">  
  
   <div ng-controller="TransferCtrl">  
           .............  
  
   </div>  
  
</div>  

js代码

// 子级传递数据给父级  
// 子级传递  
$scope.checkLoggedIn = function(type) {  
          $scope.transferType = type;  
          $scope.$emit('transfer.type', type);  
}  
  
// 父级接收  
$scope.$on('transfer.type', function(event, data) {  
          $scope.transferType = data;  
        });  
        $scope.checkLoggedIn = function() {  
          var type = $scope.transferType;  
} 

js代码

// 父级传递数据给子级  
// 父级传递  
$scope.transferType = '';  
$scope.checkLoggedIn = function(type) {  
          $scope.transferType = type;  
          $scope.$broadcast('transfer.type', type);  
}  
  
// 子级接收  
$scope.transferType = '';  
$scope.$on('transfer.type', function(event, data) {  
          $scope.transferType = data;  
        });  
        $scope.checkLoggedIn = function() {  
          var type = $scope.transferType;  
}  

应用实例：未读消息的个数显示

    子级控制器js代码:

$scope.messageView = function(data){
            $scope.currentMessage = data;
            ngDialog.open({
                template: 'html/admin/messageView.html',
                className: 'ngdialog-theme-plain custom-width-70',
                scope: $scope,
                cache: false,
                controller: function(){
                    if(data.readStatus == 0){   //状态为0表示未读；
                        $scope.$emit('messageCount', true);  //等于0的时候触发
                    }
                }
            });
            if (data.readStatus == 1) return;
            data.readStatus = 1;
            $http.post($scope.URL + "message/updateMessage", data).success(function(){
                $scope.load();
            });
        };

   父级控制器js代码:

//未读消息个数
    $scope.unreadCount = function(){
        $scope.countForm={};
        $scope.userId = $scope.IPSUser.userId;
        $scope.countForm.userId = $scope.userId;
        $http.post($scope.URL+ 'message/getUnreadCount', $scope.countForm).success(function(data) {
            $scope.count = data.data.count;
        });
    }
    $scope.unreadCount(); //进入主页以后先调用一次函数，显示未读个数
    $scope.$on('messageCount', function(event, data) {
        $scope.unreadCount();
    });

   直接在父级控制器js代码中用定时器控制刷新（子级js代码不要了），1s刷新一次后台数据，这样做缺点是请求次数太多

$scope.unreadCount = function(){
        $scope.countForm={};
        $scope.userId = $scope.IPSUser.userId;
        $scope.countForm.userId = $scope.userId;
        $http.post($scope.URL+ 'message/getUnreadCount', $scope.countForm).success(function(data) {
            $scope.count = data.data.count;
        });
    };
    $interval(function(){
        $scope.unreadCount();
    },1000);