1 #import <ifaddrs.h>  
 2 #import <arpa/inet.h>  
 3   
 4   
 5   
 6 // Get IP Address  
 7 - (NSString *)getIPAddress {      
 8     NSString *address = @"error";  
 9     struct ifaddrs *interfaces = NULL;  
10     struct ifaddrs *temp_addr = NULL;  
11     int success = 0;  
12     // retrieve the current interfaces - returns 0 on success  
13     success = getifaddrs(&interfaces);  
14     if (success == 0) {  
15         // Loop through linked list of interfaces  
16         temp_addr = interfaces;  
17         while(temp_addr != NULL) {  
18             if(temp_addr->ifa_addr->sa_family == AF_INET) {  
19                 // Check if interface is en0 which is the wifi connection on the iPhone  
20                 if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {  
21                     // Get NSString from C String  
22                     address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];                 
23                 }  
24             }  
25             temp_addr = temp_addr->ifa_next;  
26         }  
27     }  
28     // Free memory  
29     freeifaddrs(interfaces);  
30     return address;  
31   
32 }   

 1 #import <ifaddrs.h>  
 2 #import <arpa/inet.h>  
 3 #import <net/if.h>  
 4   
 5 #define IOS_CELLULAR    @"pdp_ip0"  
 6 #define IOS_WIFI        @"en0"  
 7 #define IOS_VPN         @"utun0"  
 8 #define IP_ADDR_IPv4    @"ipv4"  
 9 #define IP_ADDR_IPv6    @"ipv6"  
10   
11   
12 #pragma mark - 获取设备当前网络IP地址  
13 + (NSString *)getIPAddress:(BOOL)preferIPv4  
14 {  
15     NSArray *searchArray = preferIPv4 ?  
16     @[ 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 ] :  
17     @[ 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 ] ;  
18       
19     NSDictionary *addresses = [self getIPAddresses];  
20     NSLog(@"addresses: %@", addresses);  
21       
22     __block NSString *address;  
23     [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOLBOOL *stop)  
24      {  
25          address = addresses[key];  
26          //筛选出IP地址格式  
27          if([self isValidatIP:address]) *stop = YES;  
28      } ];  
29     return address ? address : @"0.0.0.0";  
30 }  
31   
32 + (BOOL)isValidatIP:(NSString *)ipAddress {  
33     if (ipAddress.length == 0) {  
34         return NO;  
35     }  
36     NSString *urlRegEx = @"^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."  
37     "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."  
38     "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."  
39     "([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";  
40       
41     NSError *error;  
42     NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:urlRegEx options:0 error:&error];  
43       
44     if (regex != nil) {  
45         NSTextCheckingResult *firstMatch=[regex firstMatchInString:ipAddress options:0 range:NSMakeRange(0, [ipAddress length])];  
46           
47         if (firstMatch) {  
48             NSRange resultRange = [firstMatch rangeAtIndex:0];  
49             NSString *result=[ipAddress substringWithRange:resultRange];  
50             //输出结果  
51             NSLog(@"%@",result);  
52             return YES;  
53         }  
54     }  
55     return NO;  
56 }  
57   
58 + (NSDictionary *)getIPAddresses  
59 {  
60     NSMutableDictionary *addresses = [NSMutableDictionary dictionaryWithCapacity:8];  
61       
62     // retrieve the current interfaces - returns 0 on success  
63     struct ifaddrs *interfaces;  
64     if(!getifaddrs(&interfaces)) {  
65         // Loop through linked list of interfaces  
66         struct ifaddrs *interface;  
67         for(interface=interfaces; interface; interface=interface->ifa_next) {  
68             if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ ) {  
69                 continue; // deeply nested code harder to read  
70             }  
71             const struct sockaddr_in *addr = (const struct sockaddr_in*)interface->ifa_addr;  
72             char addrBuf[ MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) ];  
73             if(addr && (addr->sin_family==AF_INET || addr->sin_family==AF_INET6)) {  
74                 NSString *name = [NSString stringWithUTF8String:interface->ifa_name];  
75                 NSString *type;  
76                 if(addr->sin_family == AF_INET) {  
77                     if(inet_ntop(AF_INET, &addr->sin_addr, addrBuf, INET_ADDRSTRLEN)) {  
78                         type = IP_ADDR_IPv4;  
79                     }  
80                 } else {  
81                     const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6*)interface->ifa_addr;  
82                     if(inet_ntop(AF_INET6, &addr6->sin6_addr, addrBuf, INET6_ADDRSTRLEN)) {  
83                         type = IP_ADDR_IPv6;  
84                     }  
85                 }  
86                 if(type) {  
87                     NSString *key = [NSString stringWithFormat:@"%@/%@", name, type];  
88                     addresses[key] = [NSString stringWithUTF8String:addrBuf];  
89                 }  
90             }  
91         }  
92         // Free memory  
93         freeifaddrs(interfaces);  
94     }  
95     return [addresses count] ? addresses : nil;  
96 }