angularjs:使用服务在控制器之间进行通信 [英] angularjs: using service to communicate between controllers

问题描述

我的控制器中注入了一项服务.该服务定义了许多功能.

I have a service that is injected in my controllers. The service defines a number of functions.

现在我想向该服务添加一个变量，该变量将在应用程序中保存 selectedItem.我是这样做的:

Now I would like to add a variable to that service that would hold the selectedItem in the application. I've done it this way:

angular.module('myservices', []).
factory('serviceA', function () {        

    var serviceA= {  
      selectedItem: selectedItem,      
      ... more functions here
    };
    return serviceA;

    var selectedItem;
    ... functions go here
});

在我的一个控制器中，我设置了所选项目:

In one of my controllers I set the selected item:

 serviceA.selectedItem = someItem;

在另一个控制器中，视图像这样引用所选项目:

and in another controller the view references the selected item like this:

<span>{{serviceA.selectedItem.value}}</span>

跨度永远不会更新，即使 selectedItem 设置正确.我究竟做错了什么 ?

The span is never updated, even though the selectedItem is set correctly. What am I doing wrong ?

推荐答案

要访问视图中的服务，需要将其分配给作用域:

To access the service in your view, you need to assign it to the scope:

$scope.serviceA = serviceA;

http://jsfiddle.net/MzJsZ/

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