iOS获取当前连接的WiFi以及IP地址

#import <ifaddrs.h>
#import <arpa/inet.h>
#import <systemconfiguration/captivenetwork.h>

+ (nullable nsstring*)getcurrentlocalip
{
  nsstring *address = nil;
  struct ifaddrs *interfaces = null;
  struct ifaddrs *temp_addr = null;
  int success = 0;
  // retrieve the current interfaces - returns 0 on success
  success = getifaddrs(&interfaces);
  if (success == 0) {
    // loop through linked list of interfaces
    temp_addr = interfaces;
    while(temp_addr != null) {
      if(temp_addr->ifa_addr->sa_family == af_inet) {
        // check if interface is en0 which is the wifi connection on the iphone
        if([[nsstring stringwithutf8string:temp_addr->ifa_name] isequaltostring:@"en0"]) {
          // get nsstring from c string
          address = [nsstring stringwithutf8string:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
        }
      }
      temp_addr = temp_addr->ifa_next;
    }
  }
  // free memory
  freeifaddrs(interfaces);
  return address;
}

+ (nullable nsstring *)getcurrewifissid {
  nsarray *ifs = (__bridge_transfer id)cncopysupportedinterfaces();
  nslog(@"supported interfaces: %@", ifs);
  id info = nil;
  for (nsstring *ifnam in ifs) {
    info = (__bridge_transfer id)cncopycurrentnetworkinfo((__bridge cfstringref)ifnam);
    nslog(@"%@ => %@", ifnam, info);
    if (info && [info count]) { break; }
  }
  return [(nsdictionary*)info objectforkey:@"ssid"];
}