获取设备ip地址-（Objective-C）

//获取设备Ip地址
- (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;

 }
	```