内容转自stack overrflow：地址： /questions/7072989/iphone-ipad-osx-how-to-get-my-ip-address-programmatically
方法二可以获得ipv4 或 ipv6地址
方法一：
#import <ifaddrs.h>#import <arpa/inet.h>// Get IP Address- (NSString *)getIPAddress { NSString *address = @"error";struct ifaddrs *interfaces = NULL;struct ifaddrs *temp_addr = NULL;int success = 0;// retrieve the current interfaces - returns 0 on successsuccess = getifaddrs(&interfaces);if (success == 0) {// Loop through linked list of interfacestemp_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 iPhoneif([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {// Get NSString from C Stringaddress = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];}}temp_addr = temp_addr->ifa_next;}}// Free memoryfreeifaddrs(interfaces);return address;}
方法二
#include <ifaddrs.h>#include <arpa/inet.h>#include <net/if.h>#define IOS_CELLULAR @"pdp_ip0"#define IOS_WIFI @"en0"//#define IOS_VPN @"utun0"#define IP_ADDR_IPv4 @"ipv4"#define IP_ADDR_IPv6 @"ipv6"- (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);__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];// retrieve the current interfaces - returns 0 on successstruct ifaddrs *interfaces;if(!getifaddrs(&interfaces)) {// Loop through linked list of interfacesstruct ifaddrs *interface;for(interface=interfaces; interface; interface=interface->ifa_next) {if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ ) {continue; // deeply nested code harder to read}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];}}}// Free memoryfreeifaddrs(interfaces);}return [addresses count] ? addresses : nil;}
