iOS网络可达性 - 似乎不起作用 [英] iOS network reachability - doesn't seem to be working

问题描述

我正在关注如何检查对于iOS或OSX上的活动Internet连接？和 http://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html 测试连接性，但遇到了一些非常基本的问题。

I'm following How to check for an active Internet connection on iOS or OSX? and http://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html to test for connectivity, but am running into some pretty basic issues.

例如，我正在从另一台机器运行.NET API，然后尝试通过我的mac mini连接到它。

For example, I'm running a .NET API off of another machine and then trying to connect to it via my mac mini.

1）当IIS运行时，一切都正常运行，我很高兴能让它工作！

1) When IIS is running, everything is working like it should, I was excited that I got this working!

2）我可以完全关闭IIS（很明显，主机无法访问），但我的reachabilityWithHostName仍然报告主机可以访问。

2) I can shut off IIS completely (obviously, host is unreachable) but my reachabilityWithHostName is still reporting that the host is reachable.

有任何想法吗？

推荐答案

请参阅 SCNetworkReachability Reference 。

SCNetworkReachability编程
接口允许应用程序以
确定系统的
当前网络配置的状态以及目标主机的
可达性。 当
应用程序发送到网络堆栈的数据包
可以离开本地设备时，
远程主机被视为可达
。
可达性并不保证
数据包实际上是主机收到的
。

打开和关闭IIS只会阻止服务器接收ftp / http等Web请求，并且不会阻止设备成功发送数据包。

Turning IIS on and off is just preventing your server from receiving web request such as ftp/http and does not stop the device from successfully sending a data packet out.

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