iOS获取手机ip地址代码

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

// get ip address
- (nsstring *)getipaddress {
  nsstring *address = @"error";
  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;
}