iOS手机获取当前的IP

获取局域网ip的方式：

1、实现方法：

+ (NSString *)getIpAddresses {
    int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0) return nil;
    NSMutableArray *ips = [NSMutableArray array];
    
    int BUFFERSIZE = 4096;
    struct ifconf ifc;
    char buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr;
    struct ifreq *ifr, ifrcopy;
    ifc.ifc_len = BUFFERSIZE;
    ifc.ifc_buf = buffer;
    if (ioctl(sockfd, SIOCGIFCONF, &ifc) >= 0){
        for (ptr = buffer; ptr < buffer + ifc.ifc_len; ){
            ifr = (struct ifreq *)ptr;
            int len = sizeof(struct sockaddr);
            if (ifr->ifr_addr.sa_len > len) {
                len = ifr->ifr_addr.sa_len;
            }
            ptr += sizeof(ifr->ifr_name) + len;
            if (ifr->ifr_addr.sa_family != AF_INET) continue;
            if ((cptr = (char *)strchr(ifr->ifr_name, ':')) != NULL) *cptr = 0;
            if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0) continue;
            memcpy(lastname, ifr->ifr_name, IFNAMSIZ);
            ifrcopy = *ifr;
            ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);
            if ((ifrcopy.ifr_flags & IFF_UP) == 0) continue;
            
            NSString *ip = [NSString stringWithFormat:@"%s", inet_ntoa(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr)];
            [ips addObject:ip];
        }
    }
    close(sockfd);
    return [ips lastObject];
}

调用：获取局域网的IP

[JXGetUserIP getIpAddresses]

获取外网的IP的方法

-(void)urlRequestOperation{
    
    //http://psy-api.shzenon.cn/
    
    //http://ip.taobao.com/service/getIpInfo.php?ip=myip
    
    
    NSString *URLTmp = @"http://psy-api.shzenon.cn?ip=myip";
    NSString *URLTmp1 = [URLTmp stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];  //转码成UTF-8  否则可能会出现错误
    //    [URLTmp stringByAddingPercentEncodingWithAllowedCharacters:(nonnull NSCharacterSet *)]
    URLTmp = URLTmp1;
    NSURLRequest *request =
    [NSURLRequest requestWithURL:[NSURL URLWithString: URLTmp]];
    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
    [operation setCompletionBlockWithSuccess:
     ^(AFHTTPRequestOperation *operation, id responseObject) {
         NSLog(@"Success: %@", operation.responseString);
         NSString *requestTmp = [NSString stringWithString:operation.responseString];
         NSData *resData = [[NSData alloc] initWithData:[requestTmp dataUsingEncoding:NSUTF8StringEncoding]];
         //系统自带JSON解析
         NSDictionary *resultDic =
         [NSJSONSerialization JSONObjectWithData:resData options:NSJSONReadingMutableLeaves error:nil];
         NSLog(@"aaaaaaa=====%@",resultDic);
         UILabel * label1 =
         [[UILabel alloc]initWithFrame:CGRectMake(100, 20, 200, 30)];
         label1.backgroundColor = [UIColor yellowColor];
         label1.text = [[resultDic objectForKey:@"data"] objectForKey:@"ip"];
         [self.view addSubview:label1];
         UILabel * label2 = [[UILabel alloc]initWithFrame:CGRectMake(100, 70, 200, 30)];
         label2.backgroundColor = [UIColor yellowColor];
         label2.text = [[resultDic objectForKey:@"data"] objectForKey:@"city"];
         [self.view addSubview:label2];
     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
         NSLog(@"Failure: %@", error);
     }];
    [operation start];
}

github下载地址：https://github.com/fenglingdeyi/IP