iOS 获取IP地址

Posted 2022-03-05 st646889325

创建一个类文件

#import <Foundation/Foundation.h>
@interface IPAddress : NSObject

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

#import "IPAddress.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 IPAddress


#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) 
            //输出结果
            NSRange resultRange = [firstMatch rangeAtIndex:0];
            NSString *result = [ipAddress substringWithRange:resultRange];
            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;


@end

在其他文件中使用[IPAddress getIPAddress:YES]