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

问题描述

我有一个在我的控制器注入的服务。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.

现在我想给一个变量添加到服务，将持有则selectedItem在应用程序中。我已经做到了这种方式：

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
});

在我的控制器之一我设置选择的项目：

In one of my controllers I set the selected item:

 serviceA.selectedItem = someItem;

而在另一个控制器中的视图引用这样选择的项目：

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

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

跨度从不更新，即使将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，则需要将其分配到的范围：

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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