以下是取得設備連接的當前WIFI名稱.    

  NSArray *names = (__bridge NSArray*)CNCopySupportedInterfaces();       NSDictionary *info = nil;       for (NSString *name in names) {           info = (__bridge NSDictionary*)CNCopyCurrentNetworkInfo((__bridge CFStringRef)name);           if (info && [info count]) {               break;           }       }       NSString *ssid = [[info objectForKey:(__bridge NSString*)kCNNetworkInfoKeySSID] lowercaseString];       NSLog(@"ssid：%@",ssid);