声明:以下代码为转载,但是忘记从哪复制得来,所以没有注明转载地址
这段代码在程序里已久,为以后方便使用写此文章,
没有多牛逼的代码,
面对现实,本人在外包团队,尽量的复制黏贴开发ios项目;
为了进度敲的ios代码因此也比较少,复制粘贴居多;
专心在学习其他语言
不求精通,只求多方面了解

iOS获取IP地址,写在你程序的工具类里调用:

#pragma - mark - 获取IPV4的地址

+ (NSString *)getIPAddress:(BOOL)preferIPv4
{
    NSArray *searchArray = preferIPv4 ?
    @[ IOS_VPN @"/" IP_ADDR_IPv4, IOS_VPN @"/" IP_ADDR_IPv6, IOS_WIFI @"/" IP_ADDR_IPv4, IOS_WIFI @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6 ] :
    @[ IOS_VPN @"/" IP_ADDR_IPv6, IOS_VPN @"/" IP_ADDR_IPv4, IOS_WIFI @"/" IP_ADDR_IPv6, IOS_WIFI @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4 ] ;
    
    NSDictionary *addresses = [self getIPAddresses];
    NSLog(@"addresses: %@", addresses);
    /*
     addresses: {
     "awdl0/ipv6" = "fe80::d002:19ff:fee5:4f3d";
     "en0/ipv4" = "192.168.2.85";
     "en0/ipv6" = "fe80::415:57:52e0:602f";
     "lo0/ipv4" = "127.0.0.1";
     "lo0/ipv6" = "fe80::1";
     "pdp_ip0/ipv4" = "100.57.191.108";
     "utun0/ipv6" = "fe80::b52b:8139:9204:d7ab";
     }
     */
    if (addresses) {
        return addresses[@"en0/ipv4"];
    }else{
        __block NSString *address;
        [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)
         {
             address = addresses[key];
             if(address) *stop = YES;
         } ];
        return address ? address : @"0.0.0.0";
    }
}

+ (NSDictionary *)getIPAddresses
{
    NSMutableDictionary *addresses = [NSMutableDictionary dictionaryWithCapacity:8];
    
    struct ifaddrs *interfaces;
    if(!getifaddrs(&interfaces)) {

        struct ifaddrs *interface;
        for(interface=interfaces; interface; interface=interface->ifa_next) {
            if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ ) {
                continue;
            }
            const struct sockaddr_in *addr = (const struct sockaddr_in*)interface->ifa_addr;
            char addrBuf[ MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) ];
            if(addr && (addr->sin_family==AF_INET || addr->sin_family==AF_INET6)) {
                NSString *name = [NSString stringWithUTF8String:interface->ifa_name];
                NSString *type;
                if(addr->sin_family == AF_INET) {
                    if(inet_ntop(AF_INET, &addr->sin_addr, addrBuf, INET_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv4;
                    }
                } else {
                    const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6*)interface->ifa_addr;
                    if(inet_ntop(AF_INET6, &addr6->sin6_addr, addrBuf, INET6_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv6;
                    }
                }
                if(type) {
                    NSString *key = [NSString stringWithFormat:@"%@/%@", name, type];
                    addresses[key] = [NSString stringWithUTF8String:addrBuf];
                }
            }
        }
        freeifaddrs(interfaces);
    }
    return [addresses count] ? addresses : nil;
}