iOS 4.1+获取网络连接信息

iOS 4.1+获取当前连接的网络信息：

#import <SystemConfiguration/CaptiveNetwork.h>

- (id)fetchSSIDInfo
{
  NSArray *ifs = (id)CNCopySupportedInterfaces();
  NSLog(@"%s: Supported interfaces: %@", __func__, ifs);
  id info = nil;
  for (NSString *ifnam in ifs) {
    info = (id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);
    NSLog(@"%s: %@ => %@", __func__, ifnam, info);
    if (info && [info count]) {
      break;
    }
    [info release];
  }
  [ifs release];
  return [info autorelease];
}

ref:

http://stackoverflow.com/questions/15195704/how-to-get-bssid-in-iphone-without-private-library

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