macOS开发之获取IP地址

macOS开发中获取IP地址的方法，由于时间紧迫就不多讲解，直接上工具类了

工具类的.h和.m文件，复制过去就可以

• SHRequestIPAdressTool.h

#import <Foundation/Foundation.h>

@interface SHRequestIPAdressTool : NSObject
+ (NSString *)getIPAddress:(BOOL)preferIPv4;
@end

• SHRequestIPAdressTool.m

#import "SHRequestIPAdressTool.h"
#import <ifaddrs.h>
#import <arpa/inet.h>
#import <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"

@implementation SHRequestIPAdressTool

#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];
     __block NSString *address;
    [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)
      {
          address = addresses[key];
         if([self isValidatIP:address]) *stop = YES;
      } ];
     return address ? address : @"";
 }

+ (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) {
             return YES;
        }
    }
     return NO;
}

+ (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) ) {
                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;
}

@end

该方法也适用于iOS