iOS开发 获取公网IP和局域网IP地址

//获取公网IP非局域网IP

直接访问此网址 NSString *url = @"http://ip.taobao.com/service/getIpInfo.php?ip=myip";

网址返回的JSON数据段
    {"code":0,
    "data":{
        "country":"中国",
        "country_id":"CN",
        "area":"华东",
        "area_id":"300000",
        "region":"上海市",
        "region_id":"310000",
        "city":"上海市",
        "city_id":"310100",
        "county":"浦东",
        "county_id":"334115",
        "isp":"电信",
        "isp_id":"100227",
        "ip":"126.231.115.34"
    }
}
- (void)urlRequestOperation{
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
        NSString *URLTmp1 = @"http://1212.ip138.com/ic.asp";
        NSString *URLTmp = [URLTmp1 stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
        NSData * resData = [NSData dataWithContentsOfURL:[NSURL URLWithString:URLTmp]];
        dispatch_async(dispatch_get_main_queue(), ^{
            if (resData) {
                //系统自带JSON解析
                NSStringEncoding gbkEncoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
//您的IP是：[122.222.122.22] 来自：上海市某某区 某某运营商
                NSString *str3 = [[NSString alloc] initWithData:resData encoding:gbkEncoding];
   }
        });
    });
}

//获取局域网IP地址- (NSString *)getIpAddresses{    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;}