iOS获取手机IP地址

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

// 获取设备局域网地址
+(NSString *)getIPAddress {
    NSString *address = @"error";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    // 检索当前接口,在成功时,返回0
    success = getifaddrs(&interfaces);
    if (success == 0) {
        // 循环链表的接口
        temp_addr = interfaces;
        while(temp_addr != NULL) {
            if(temp_addr->ifa_addr->sa_family == AF_INET) {
                // 检查接口是否en0 wifi连接在iPhone上
                if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
                    // 得到NSString从C字符串
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
    }
    // 释放内存
    freeifaddrs(interfaces);
    return address;
}

//看了别人改了一下
//获得手机IP地址
NSError *error;
NSURL *ipURL = [NSURL URLWithString:@"http://pv.sohu.com/cityjson?ie=utf-8"];  NSMutableString *ip = [NSMutableString stringWithContentsOfURL:ipURL encoding:NSUTF8StringEncoding error:&error];   
 //判断返回字符串是否为所需数据 
   if ([ip hasPrefix:@"var returnCitySN = "]) {          //删除字符串多余字符串  
      NSRange range = NSMakeRange(0, 19);    
    [ip deleteCharactersInRange:range];  
      NSString * nowIp =[ip substringToIndex:ip.length-1];       //将字符串转换成二进制进行Json解析      
  NSData * data = [nowIp dataUsingEncoding:NSUTF8StringEncoding]; 
  NSDictionary * dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];      
  NSLog(@"%@",dict);      
  return dict[@"cip"] ? dict[@"cip"] : @"";    } 
 return @"";

//作者：阳光的味道_丁达尔
//链接：https://www.jianshu.com/p/2a1a567bbb6e