//獲取公網IP非區域網IP

直接訪問此網址 NSString *url = @"http://ip.taobao.com/service/getIpInfo.php?ip=myip";

網址返回的JSON資料段

    {"code":0,
"data":{
        "country":"中國",
        "country_id":"CN",
        "area":"華東",
        "area_id":"300000",
        "region":"上海市",
        "region_id":"310000",
        "city":"上海市",
        "city_id":"310100"
 
,
        "county":"浦東",
        "county_id":"334115",
        "isp":"電信",
        "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

NSData * resData = [NSDatadataWithContentsOfURL:[NSURLURLWithString:URLTmp]];

dispatch_async(dispatch_get_main_queue(), ^{

if (resData) {

//系統自帶JSON解析

NSStringEncoding gbkEncoding = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000

//您的IP是：[122.222.122.22] 來自：上海市某某區 某某運營商

NSString *str3 = [[NSStringalloc] initWithData:resData encoding:gbkEncoding];

   }

        });

    });

}

//獲取區域網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;
}