在iOS中捕获Wi-Fi网络更改事件 [英] Capture Wi-Fi network changing event in iOS

问题描述

当用户连接到iOS应用中的特定WiFi网络时，是否有任何方法可以捕获事件。即使可以使用任何不需要超级用户权限（越狱）的私有库来实现这一点也很好。我只想捕获连接的SSID的变化事件。

Is there any way to capture the event occurs when a user connects to a particular WiFi network in iOS app. It is fine even if this can be achieved using any private library which doesn't require super user privileges (jail break). I just want to capture the changing event of the connected SSID.

推荐答案

我建议只使用Larme发布的内容，并设置每隔一秒左右检查一次NSTimer，当前网络的SSID是什么，如果你发现了变化，只需做你需要做的事情。请记住，改变WiFi网络不是即时发生的事情，所以1秒的分辨率是不错的

I would recommend simply using what Larme posted, and setting up an NSTimer to check every second or so, what the SSID of your current network is, if you detect a change, simply do whatever you need to do. Keep in mind, changing WiFi networks is not something that happens instantaneously, so having a 1 second resolution is not bad

在 applicationDidFinishLoading

In applicationDidFinishLoading

NSTimer *ssidTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(fetchSSIDInfo) userInfo:nil repeats:YES];

在AppDelegate中

- (id)fetchSSIDInfo {
     NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
     NSLog(@"Supported interfaces: %@", ifs);
     id info = nil;
     NSString *ifnam = @"";
     for (ifnam in ifs) {
         info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
         NSLog(@"%@ => %@", ifnam, info);
         if (info && [info count]) { break; }
     }
     if ([info count] >= 1 && [ifnam caseInsensitiveCompare:prevSSID] !=  NSOrderedSame) {
          // Trigger some event
          prevSSID = ifnam;
     }

     return info;
}

类似的东西。我无法检查代码是否没有拼写错误，因为我不在mac前面，但它不应该太差异

Something like that. I can not check if code is typo free as I am not in front of a mac, but it should not be too different

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