升级到iOS 5后NSURLConnection失败 [英] NSURLConnection fails after upgrade to iOS 5

问题描述

我有一个非常简单的NSURLConnection调用，在iOS 5以外的所有iOS版本中都能正常工作。因为这是一个'sendSynchronousRequest'调用，所以在应用程序的任何地方都没有声明NSURL委托（响应应该直接回到这个方法）呼叫）。此外，因为这是一个sendSynchronousRequest，所以在应用程序中没有实现'didReceiveData'或其他与NSURL相关的方法。

I have a very simple NSURLConnection call that works perfectly in all iOS versions except iOS 5. Since this is a 'sendSynchronousRequest' call, there are no NSURL delegates declared anywhere in the app (the response should come directly back to this method call). Also, because this is a sendSynchronousRequest, there are no 'didReceiveData' or other NSURL-associated methods implemented in the app.

以下是有问题的代码行：

Here is the offending line of code:

NSData *response = [NSURLConnection sendSynchronousRequest: serviceRequest returningResponse:nil error:nil];

当我单步执行调试器中的代码时，我可以确认应用程序正在发送请求，并且服务器正在接收请求。我还可以确认服务器然后将响应发送回客户端。

When I step through the code in the debugger, I can confirm that app is sending the request, and that the server is receiving the request. I can also confirm that the server is then sending a response back to the client.

这一切都运行良好，直到我升级到iOS 5.现在，在更新到iOS5之后，NSData变量（响应）永远不会收到任何东西，并且总是回来0字节。

This was all working perfectly until I upgraded to iOS 5. Now, after the update to iOS5, the NSData variable (response) is never receiving anything and always comes back with 0 bytes.

除了对iOS5的更新外，根本没有代码更改。

Other than the update to iOS5, there have been no code changes at all.

推荐答案

在iOS 5中对NSURLConnection类进行了一些更改。特别是，不推荐使用了几个委托方法。我遇到了类似的问题，它是由一个不再被调用的委托方法引起的。如果这听起来像你的问题，看看正式委托协议 NSURLConnectionDelegate 和 NSURLConnectionDataDelegate 。

There were several changes made to the NSURLConnection class in iOS 5. In particular, several delegate methods that were deprecated. I experienced a similar issue and it was caused by one of the delegate methods no longer being called. If this sounds like your issue, take a look at the formal delegate protocols NSURLConnectionDelegate and NSURLConnectionDataDelegate.

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