获取当前设备的IP地址

头文件：

#import <ifaddrs.h>

#import <arpa/inet.h>

#import <net/if.h>

宏定义：

#define IOS_CELLULAR    @"pdp_ip0"

#define IOS_WIFI        @"en0"

#define IOS_VPN         @"utun0"

#define IP_ADDR_IPv4    @"ipv4"

#define IP_ADDR_IPv6    @"ipv6"

公共方法：

#pragma mark - 获取设备当前网络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 ] ;

NSDictionary *addresses = [self getIPAddresses];

NSLog(@"addresses: %@", addresses);

__block NSString *address;

[searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)

{

address = addresses[key];

//筛选出IP地址格式

if([self isValidatIP:address]) *stop = YES;

} ];

return address ? address : @"0.0.0.0";

}

+ (BOOL)isValidatIP:(NSString *)ipAddress {

if (ipAddress.length == 0) {

return NO;

}

NSString *urlRegEx = @"^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."

"([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."

"([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."

"([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";

NSError *error;

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:urlRegEx options:0 error:&error];

if (regex != nil) {

NSTextCheckingResult *firstMatch=[regex firstMatchInString:ipAddress options:0 range:NSMakeRange(0, [ipAddress length])];

if (firstMatch) {

NSRange resultRange = [firstMatch rangeAtIndex:0];

NSString *result=[ipAddress substringWithRange:resultRange];

//输出结果

NSLog(@"%@",result);

return YES;

}

}

return NO;

}

+ (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;

}