iPhone 应用程序退出前使会话失效
我想告诉服务器当用户退出 iPhone 应用程序时使正在进行的会话无效。
在应用程序委托中，我在 (void)applicationWillTerminate:(UIApplication *)application 方法中向服务器发送请求。我不是在等待服务器答复，我只想发送请求并退出。
但是我看不到任何数据包离开应用程序。相同的代码在另一个地方工作正常。
无论如何，会话的持续时间有限，服务器会在一段时间后使其失效，但我更愿意在离开应用程序时做得很好。
从 applicationWillTerminate 方法中无法建立 NSURLConnection 是否正常？
谢谢。
I would like to tell the server to invalidate an ongoing session when the user quits the iPhone application.
In the app delegate, I send a request to the server in the (void)applicationWillTerminate:(UIApplication *)application method. I am not waiting for a server answer, I just want to send the request and quit.
However I cant see any packet leaving the application. The same code in another place works fine.
Session has a limited duration anyway and the server will invalidate it after a while, but I would prefer to do it nicely when leaving application.
Is it normal that no NSURLConnection can be established from the applicationWillTerminate method ?
Thank you.
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如果您发送异步请求，则应用程序很可能在发出请求之前退出。
尝试使用同步请求作为测试，但我不建议在生产中这样做，因为同步请求可能需要不确定的时间。如果他的应用程序强行退出，它会在 iTunes Connect 的崩溃报告部分显示为“退出超时”。
If you're sending an asynchronous request, it's very likely that the app quits before the request is made.
Try using a synchronous request as a test, although I wouldn't recommend doing that in production, as synchronous requests can take an indeterminate amount of time. If he app forcibly quits, it'll show as a "time-out on quit" in your crash reports section in iTunes Connect.