項(xiàng)目中又遇到要將手機(jī)網(wǎng)絡(luò)IP地址傳參到服務(wù)器由于之前沒有做過，記錄下遇到的問題抖部，手機(jī)IP地址分為倆種情況鹰服，WiFi網(wǎng)絡(luò)IP地址和蜂窩移動(dòng)網(wǎng)絡(luò)IP地址。
1眼俊、WiFi地址（類方法直接調(diào)用意狠，可以直接寫進(jìn)網(wǎng)絡(luò)框架里面），這種只有當(dāng)手機(jī)連接到WiFi時(shí)候可用疮胖，否則返回為error环戈，

+ (NSString *)getIPAddress {      
    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;  
}   

2、WiFi和蜂窩移動(dòng)網(wǎng)絡(luò)通用（創(chuàng)建繼承于NSObject類 JCIPAddressConfig）

JCIPAddressConfig.h中
#import <Foundation/Foundation.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <errno.h>
#include <net/if_dl.h>
#include <net/ethernet.h>
#include <ifaddrs.h>
#include <arpa/inet.h>

#define BUFFERSIZE  4000
#define MAXADDRS    32
#define min(a,b)    ((a) < (b) ? (a) : (b))
#define max(a,b)    ((a) > (b) ? (a) : (b))

@interface JCIPAddressConfig : NSObject
// extern
extern char *if_names[MAXADDRS];
extern char *ip_names[MAXADDRS];
extern char *hw_addrs[MAXADDRS];
extern unsigned long ip_addrs[MAXADDRS];

// Function prototypes
void InitAddresses();
void FreeAddresses();
void GetIPAddresses();
void GetHWAddresses();
@end
JCIPAddressConfig.m中
@implementation JCIPAddressConfig
char *if_names[MAXADDRS];
char *ip_names[MAXADDRS];
char *hw_addrs[MAXADDRS];
unsigned long ip_addrs[MAXADDRS];
static int   nextAddr = 0;
void InitAddresses() {
    int i;
    for (i=0; i<MAXADDRS; ++i) {
        if_names[i] = ip_names[i] = hw_addrs[i] = NULL;
        ip_addrs[i] = 0;
    }
}

void FreeAddresses() {
    int i;
    for (i=0; i<MAXADDRS; ++i) {
        if (if_names[i] != 0) free(if_names[i]);
        if (ip_names[i] != 0) free(ip_names[i]);
        if (hw_addrs[i] != 0) free(hw_addrs[i]);
        ip_addrs[i] = 0;
    }
    InitAddresses();
}

void GetIPAddresses() {
    int                 i, len, flags;
    char                buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ], *cptr;
    struct ifconf       ifc;
    struct ifreq        *ifr, ifrcopy;
    struct sockaddr_in  *sin;
    char temp[80];
    int sockfd;
    for (i=0; i<MAXADDRS; ++i) {
        if_names[i] = ip_names[i] = NULL;
        ip_addrs[i] = 0;
    }
    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0) {
        perror("socket failed");
        return;
    }
    ifc.ifc_len = BUFFERSIZE;
    ifc.ifc_buf = buffer;
    if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
        perror("ioctl error");
        return;
    }
    lastname[0] = 0;
    for (ptr = buffer; ptr < buffer + ifc.ifc_len; ) {
        ifr = (struct ifreq *)ptr;
        len = max(sizeof(struct sockaddr), ifr->ifr_addr.sa_len);
        ptr += sizeof(ifr->ifr_name) + len;   // for next one in buffer
        
        if (ifr->ifr_addr.sa_family != AF_INET) {
            continue; // ignore if not desired address family
        }
        
        if ((cptr = (char *)strchr(ifr->ifr_name, ':')) != NULL)  {
            *cptr = 0;        // replace colon will null
        }
        
        if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0) {
            continue; /* already processed this interface */
        }
        memcpy(lastname, ifr->ifr_name, IFNAMSIZ);
        ifrcopy = *ifr;
        ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);
        flags = ifrcopy.ifr_flags;
        if ((flags & IFF_UP) == 0){
            continue; // ignore if interface not up
        }
        if_names[nextAddr] = (char *)malloc(strlen(ifr->ifr_name)+1);
        if (if_names[nextAddr] == NULL){
            return;
        }
        strcpy(if_names[nextAddr], ifr->ifr_name);
        sin = (struct sockaddr_in *)&ifr->ifr_addr;
        strcpy(temp, inet_ntoa(sin->sin_addr));
        ip_names[nextAddr] = (char *)malloc(strlen(temp)+1);
        if (ip_names[nextAddr] == NULL) {
            return;
        }
        strcpy(ip_names[nextAddr], temp);
        ip_addrs[nextAddr] = sin->sin_addr.s_addr;
        ++nextAddr;
    }
    close(sockfd);
}

void GetHWAddresses(){
    struct ifconf ifc;
    struct ifreq *ifr;
    int i, sockfd;
    char buffer[BUFFERSIZE], *cp, *cplim;
    char temp[80];
    for (i=0; i<MAXADDRS; ++i) {
        hw_addrs[i] = NULL;
    }
    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0) {
        perror("socket failed");
        return;
    }
    
    ifc.ifc_len = BUFFERSIZE;
    ifc.ifc_buf = buffer;
    if (ioctl(sockfd, SIOCGIFCONF, (char *)&ifc) < 0) {
        perror("ioctl error");
        close(sockfd);
        return;
    }
    ifr = ifc.ifc_req;
    cplim = buffer + ifc.ifc_len;
    for (cp=buffer; cp < cplim; ) {
        ifr = (struct ifreq *)cp;
        if (ifr->ifr_addr.sa_family == AF_LINK) {
            struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr;
            int a,b,c,d,e,f;
            int i;
            strcpy(temp, (char *)ether_ntoa((const struct ether_addr *)LLADDR(sdl)));
            sscanf(temp, "%x:%x:%x:%x:%x:%x", &a, &b, &c, &d, &e, &f);
            sprintf(temp, "%02X:%02X:%02X:%02X:%02X:%02X",a,b,c,d,e,f);
            
            for (i=0; i<MAXADDRS; ++i){
                if ((if_names[i] != NULL) && (strcmp(ifr->ifr_name, if_names[i]) == 0)) {
                    if (hw_addrs[i] == NULL){
                        hw_addrs[i] = (char *)malloc(strlen(temp)+1);
                        strcpy(hw_addrs[i], temp);
                        break;
                    }
                }
            }
        }
        cp += sizeof(ifr->ifr_name) + max(sizeof(ifr->ifr_addr), ifr->ifr_addr.sa_len);
    }
    close(sockfd);
}
@end
網(wǎng)絡(luò)請求類.h中澎灸，聲明獲取IP地址類方法
/*
 * 獲取設(shè)備IP地址
 */
+ (NSString *)getIPAddress:(BOOL)preferIPv4;
網(wǎng)絡(luò)請求類.m中院塞，實(shí)現(xiàn)方法
/*
 * 獲取設(shè)備IP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 ];//此處我只需要IPv4地址，并不需要IPv6所以不需要直接不用
    NSDictionary *addresses = [self getIPAddresses];
    JCLog(@"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 success
    struct ifaddrs *interfaces;
    if(!getifaddrs(&interfaces)) {
        // Loop through linked list of interfaces
        struct 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 memory
        freeifaddrs(interfaces);
    }
    return [addresses count] ? addresses : nil;
}

到此獲取手機(jī)IP地址完成性昭，方法一只能獲取到WiFi地址拦止，方法二倆種都能獲取到
附上demo地址，歡迎star??????