Iphone互联网连接（可达性） [英] Iphone internet connection (Reachability)

问题描述

我看到任何有关可达性的帖子，但人们并没有真正给出问题的确切答案。
在我的应用程序中，我使用来自apple的可达性代码，在我的appDelegate中，我使用：

I saw any post about Reachability but people doesn't really give the exact answer to the problem. In my application I use the Reachability code from apple and in my appDelegate I use this:

-(BOOL)checkInternet {

Reachability *reachability = [Reachability reachabilityWithHostName:@"www.google.com"];

NetworkStatus internetStatus = [reachability currentReachabilityStatus];
BOOL internet;

if ((internetStatus != ReachableViaWiFi) && (internetStatus != ReachableViaWWAN)) {
    internet = NO;
}else {
    internet = YES;
}
return internet;    
}

所以问题是即使我有互联网连接，这段代码告诉我我没有。
有谁知道该怎么做才能使这个工作？

So the problem is even if I have an internet connection, this code telling me that I don't have one. Does anyone know what to do to make this working?

谢谢，

推荐答案

您可能应该使用 + [Reachability reachabilityForInternetConnection] 而不是特定名称的可达性（当然除非您实际需要）。

You should probably be using +[Reachability reachabilityForInternetConnection] rather than reachability for a particular name (unless of course that's what you actually need).

毕竟，当你仍然有可用的互联网连接时，可能会出现各种原因导致特定服务器无法访问。

There could be all manner of reasons that a particular server might not be reachable while you still have a working internet connection, after all.

这就是我的工作：

BOOL hasInet;
Reachability *connectionMonitor = [Reachability reachabilityForInternetConnection];
[[NSNotificationCenter defaultCenter]
    addObserver: self
    selector: @selector(inetAvailabilityChanged:)
    name:  kReachabilityChangedNotification
    object: connectionMonitor];

hasInet = [connectionMonitor currentReachabilityStatus] != NotReachable;

然后

-(void)inetAvailabilityChanged:(NSNotification *)notice {
    Reachability *r = (Reachability *)[notice object];
    hasInet = [r currentReachabilityStatus] != NotReachable;
}

对我来说效果很好。

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