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如何将AFNetworking与多个UIViewControllers一起使用？

[英]How to use AFNetworking with multiple UIViewControllers?

原文 2014-07-27 17:42:01 6 1 ios/ uiviewcontroller/ afnetworking/ multiple-instances

For example, one UIViewController requests data using AFNetworking on appear event and perform some actions on result receiving. 例如，一个UIViewController在出现事件时使用AFNetworking请求数据，并对结果接收执行一些操作。 These actions are defined in a block which I give to a request object as a param. 这些动作在一个块中定义，我将其作为参数提供给请求对象。

Now I want to add a button which will push another view controller. 现在，我想添加一个按钮，它将按下另一个视图控制器。 This view controller will use the same data which the first view controller already uses. 该视图控制器将使用第一个视图控制器已经使用的相同数据。

The problem is I don't need to resend the same request for the second one but I'll have some issues with it: 1)I can't set its params directly on request completion because the second view controller may not exist yet 2)If the second one is currently displayed then should I handle the data in the first one? 问题是我不需要为第二个请求重新发送相同的请求，但是会遇到一些问题：1）我无法在请求完成时直接设置其参数，因为第二个视图控制器可能还不存在2 ）如果当前显示第二个数据，那么我应该处理第一个数据吗？

To handle requests I create NSURLSessionTask object and call showAlertViewForTaskWithErrorOnCompletion:delegate: . 为了处理请求，我创建了NSURLSessionTask对象并调用showAlertViewForTaskWithErrorOnCompletion:delegate: It is just two strings of code so I think it is not necessary to post it. 它只是两个代码字符串，因此我认为没有必要发布它。

1 个解决方案

Fundamentally it sounds like you are trying to share data between view controllers. 从根本上来说，这听起来像您正在尝试在视图控制器之间共享数据。 There are multiple solutions to this problem, refer to this answer: 有多种解决方案，请参考以下答案：

Passing Data between View Controllers 在视图控制器之间传递数据

For checking which is the displayed view controller, consult this answer: 要检查哪个是显示的视图控制器，请参考以下答案：

How to determine which view controller is currently active/the one displaying a view? 如何确定哪个视图控制器当前处于活动状态/哪个显示视图？