當ipv6和ipv4地址不同時的處理:

-(void)getHost{

if ([DeviceInfo isIpv6]) {
        return hostIpv6;
    }
    return hostIpv4;
}

-(void)getBaseUrl{
    if ([DeviceInfo isIpv6]) {
        return baseUrlIpv6;
    }
    return baseUrlIpv4;
}

具體的DeviceInfo類如下

DeviceInfo.h

#import <Foundation/Foundation.h>
 


@interface DeviceInfo : NSObject
+ (NSString *) OpenUDID;
+ (BOOL)isIpv6;
+ (NSString *)getIPAddress:(BOOL)preferIPv4;
@end

DeviceInfo.m

#import "YCX_DeviceInfo.h"
#import <AssetsLibrary/AssetsLibrary.h>
#import <MobileCoreServices/MobileCoreServices.h>
#import "SvUDIDTools.h"
#include <ifaddrs.h>
 

#include <arpa/inet.h>
#include <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 DeviceInfo
+ (BOOL)isIpv6
{
    NSString *ipv6 = [self getIPAddress:NO
 
];
    NSInteger count = [ipv6 countOccurencesOfString:@":"];
    if (count >= 6) {
        return YES;
    }
    return NO;
}
+ (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(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;
}
+ (NSString *) OpenUDID{
    return [[UIDevice currentDevice].identifierForVendor UUIDString];

}

使用到的SvUDIDTools類方法設定如下:

#import <Foundation/Foundation.h>

@interface SvUDIDTools : NSObject


/*
 * @brief obtain Unique Device Identity
 */
+ (NSString*)UDID;

@end








#import "SvUDIDTools.h"
#import <Security/Security.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>

// replace the identity with your company's domain
static const char kKeychainUDIDItemIdentifier[]  = "UUID";
static const char kKeyChainUDIDAccessGroup[] = "請設定你自己的";

@implementation SvUDIDTools

+ (NSString*)UDID
{
    NSString *udid = [SvUDIDTools getUDIDFromKeyChain];
    if (!udid) {

        NSString *sysVersion = [UIDevice currentDevice].systemVersion;
        CGFloat version = [sysVersion floatValue];

        if (version >= 7.0) {
            udid = [SvUDIDTools _UDID_iOS7];
        }
        else if (version >= 2.0) {
            udid = [SvUDIDTools _UDID_iOS6];
        }

        [SvUDIDTools settUDIDToKeyChain:udid];
    }

    return udid;
}

/*
 * iOS 6.0
 * use wifi's mac address
 */
+ (NSString*)_UDID_iOS6
{
    return [SvUDIDTools getMacAddress];
}

/*
 * iOS 7.0
 * Starting from iOS 7, the system always returns the value 02:00:00:00:00:00 
 * when you ask for the MAC address on any device.
 * use identifierForVendor + keyChain
 * make sure UDID consistency atfer app delete and reinstall
 */
+ (NSString*)_UDID_iOS7
{
    return [[UIDevice currentDevice].identifierForVendor UUIDString];
}


#pragma mark -
#pragma mark Helper Method for Get Mac Address

// from http://stackoverflow.com/questions/677530/how-can-i-programmatically-get-the-mac-address-of-an-iphone
+ (NSString *)getMacAddress
{
    int                 mgmtInfoBase[6];
    char                *msgBuffer = NULL;
    size_t              length;
    unsigned char       macAddress[6];
    struct if_msghdr    *interfaceMsgStruct;
    struct sockaddr_dl  *socketStruct;
    NSString            *errorFlag = nil;

    // Setup the management Information Base (mib)
    mgmtInfoBase[0] = CTL_NET;        // Request network subsystem
    mgmtInfoBase[1] = AF_ROUTE;       // Routing table info
    mgmtInfoBase[2] = 0;
    mgmtInfoBase[3] = AF_LINK;        // Request link layer information
    mgmtInfoBase[4] = NET_RT_IFLIST;  // Request all configured interfaces

    // With all configured interfaces requested, get handle index
    if ((mgmtInfoBase[5] = if_nametoindex("en0")) == 0)
        errorFlag = @"if_nametoindex failure";
    else
    {
        // Get the size of the data available (store in len)
        if (sysctl(mgmtInfoBase, 6, NULL, &length, NULL, 0) < 0)
            errorFlag = @"sysctl mgmtInfoBase failure";
        else
        {
            // Alloc memory based on above call
            if ((msgBuffer = malloc(length)) == NULL)
                errorFlag = @"buffer allocation failure";
            else
            {
                // Get system information, store in buffer
                if (sysctl(mgmtInfoBase, 6, msgBuffer, &length, NULL, 0) < 0)
                    errorFlag = @"sysctl msgBuffer failure";
            }
        }
    }

    // Befor going any further...
    if (errorFlag != NULL)
    {
        NSLog(@"Error: %@", errorFlag);
        if (msgBuffer) {
            free(msgBuffer);
        }

        return errorFlag;
    }

    // Map msgbuffer to interface message structure
    interfaceMsgStruct = (struct if_msghdr *) msgBuffer;

    // Map to link-level socket structure
    socketStruct = (struct sockaddr_dl *) (interfaceMsgStruct + 1);

    // Copy link layer address data in socket structure to an array
    memcpy(&macAddress, socketStruct->sdl_data + socketStruct->sdl_nlen, 6);

    // Read from char array into a string object, into traditional Mac address format
    NSString *macAddressString = [NSString stringWithFormat:@"%02X:%02X:%02X:%02X:%02X:%02X",
                                  macAddress[0], macAddress[1], macAddress[2],
                                  macAddress[3], macAddress[4], macAddress[5]];
    NSLog(@"Mac Address: %@", macAddressString);

    // Release the buffer memory
    free(msgBuffer);

    return macAddressString;
}

#pragma mark -
#pragma mark Helper Method for make identityForVendor consistency

+ (NSString*)getUDIDFromKeyChain
{
    NSMutableDictionary *dictForQuery = [[NSMutableDictionary alloc] init];
    [dictForQuery setValue:(id)kSecClassGenericPassword forKey:(id)kSecClass];

    // set Attr Description for query
    [dictForQuery setValue:[NSString stringWithUTF8String:kKeychainUDIDItemIdentifier]
                    forKey:(NSString *)kSecAttrDescription];

    // set Attr Identity for query
    NSData *keychainItemID = [NSData dataWithBytes:kKeychainUDIDItemIdentifier
                                            length:strlen(kKeychainUDIDItemIdentifier)];
    [dictForQuery setObject:keychainItemID forKey:(id)kSecAttrGeneric];

    // The keychain access group attribute determines if this item can be shared
    // amongst multiple apps whose code signing entitlements contain the same keychain access group.
    NSString *accessGroup = [NSString stringWithUTF8String:kKeyChainUDIDAccessGroup];
    if (accessGroup != nil)
    {
#if TARGET_IPHONE_SIMULATOR
        // Ignore the access group if running on the iPhone simulator.
        //
        // Apps that are built for the simulator aren't signed, so there's no keychain access group
        // for the simulator to check. This means that all apps can see all keychain items when run
        // on the simulator.
        //
        // If a SecItem contains an access group attribute, SecItemAdd and SecItemUpdate on the
        // simulator will return -25243 (errSecNoAccessForItem).
#else
        [dictForQuery setObject:accessGroup forKey:(id)kSecAttrAccessGroup];
#endif
    }

    [dictForQuery setValue:(id)kCFBooleanTrue forKey:(id)kSecMatchCaseInsensitive];
    [dictForQuery setValue:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];
    [dictForQuery setValue:(id)kCFBooleanTrue forKey:(id)kSecReturnData];

    OSStatus queryErr   = noErr;
    NSData   *udidValue = nil;
    NSString *udid      = nil;
    CFTypeRef typeRef = (__bridge CFTypeRef)udidValue;
    queryErr = SecItemCopyMatching((CFDictionaryRef)dictForQuery, &typeRef);

    NSMutableDictionary *dict = nil;
    [dictForQuery setValue:(id)kCFBooleanTrue forKey:(id)kSecReturnAttributes];

    CFTypeRef typeDict = (__bridge CFTypeRef)dict;
    queryErr = SecItemCopyMatching((CFDictionaryRef)dictForQuery, &typeDict);

    if (queryErr == errSecItemNotFound) {
        NSLog(@"KeyChain Item: %@ not found!!!", [NSString stringWithUTF8String:kKeychainUDIDItemIdentifier]);
    }
    else if (queryErr != errSecSuccess) {
        NSLog(@"KeyChain Item query Error!!! Error code:%d", queryErr);
    }
    if (queryErr == errSecSuccess) {
        NSLog(@"KeyChain Item: %@", udidValue);

        if (udidValue) {
            udid = [NSString stringWithUTF8String:udidValue.bytes];
        }
    }
    return udid;
}

+ (BOOL)settUDIDToKeyChain:(NSString*)udid
{
    NSMutableDictionary *dictForAdd = [[NSMutableDictionary alloc] init];

    [dictForAdd setValue:(id)kSecClassGenericPassword forKey:(id)kSecClass];
    [dictForAdd setValue:[NSString stringWithUTF8String:kKeychainUDIDItemIdentifier] forKey:(NSString *)kSecAttrDescription];

    [dictForAdd setValue:@"UUID" forKey:(id)kSecAttrGeneric];

    // Default attributes for keychain item.
    [dictForAdd setObject:@"" forKey:(id)kSecAttrAccount];
    [dictForAdd setObject:@"" forKey:(id)kSecAttrLabel];


    // The keychain access group attribute determines if this item can be shared
    // amongst multiple apps whose code signing entitlements contain the same keychain access group.
    NSString *accessGroup = [NSString stringWithUTF8String:kKeyChainUDIDAccessGroup];
    if (accessGroup != nil)
    {
#if TARGET_IPHONE_SIMULATOR
        // Ignore the access group if running on the iPhone simulator.
        //
        // Apps that are built for the simulator aren't signed, so there's no keychain access group
        // for the simulator to check. This means that all apps can see all keychain items when run
        // on the simulator.
        //
        // If a SecItem contains an access group attribute, SecItemAdd and SecItemUpdate on the
        // simulator will return -25243 (errSecNoAccessForItem).
#else
        [dictForAdd setObject:accessGroup forKey:(id)kSecAttrAccessGroup];
#endif
    }

    const char *udidStr = [udid UTF8String];
    NSData *keyChainItemValue = [NSData dataWithBytes:udidStr length:strlen(udidStr)];
    [dictForAdd setValue:keyChainItemValue forKey:(id)kSecValueData];

    OSStatus writeErr = noErr;
    if ([SvUDIDTools getUDIDFromKeyChain]) {        // there is item in keychain
        [SvUDIDTools updateUDIDInKeyChain:udid];
        return YES;
    }
    else {          // add item to keychain
        writeErr = SecItemAdd((CFDictionaryRef)dictForAdd, NULL);
        if (writeErr != errSecSuccess) {
            NSLog(@"Add KeyChain Item Error!!! Error Code:%d", writeErr);

            return NO;
        }
        else {
            NSLog(@"Add KeyChain Item Success!!!");
            return YES;
        }
    }

    return NO;
}

+ (BOOL)removeUDIDFromKeyChain
{
    NSMutableDictionary *dictToDelete = [[NSMutableDictionary alloc] init];

    [dictToDelete setValue:(id)kSecClassGenericPassword forKey:(id)kSecClass];

    NSData *keyChainItemID = [NSData dataWithBytes:kKeychainUDIDItemIdentifier length:strlen(kKeychainUDIDItemIdentifier)];
    [dictToDelete setValue:keyChainItemID forKey:(id)kSecAttrGeneric];

    OSStatus deleteErr = noErr;
    deleteErr = SecItemDelete((CFDictionaryRef)dictToDelete);
    if (deleteErr != errSecSuccess) {
        NSLog(@"delete UUID from KeyChain Error!!! Error code:%d", deleteErr);
        return NO;
    }
    else {
        NSLog(@"delete success!!!");
    }

    return YES;
}

+ (BOOL)updateUDIDInKeyChain:(NSString*)newUDID
{

    NSMutableDictionary *dictForQuery = [[NSMutableDictionary alloc] init];

    [dictForQuery setValue:(id)kSecClassGenericPassword forKey:(id)kSecClass];

    NSData *keychainItemID = [NSData dataWithBytes:kKeychainUDIDItemIdentifier
                                            length:strlen(kKeychainUDIDItemIdentifier)];
    [dictForQuery setValue:keychainItemID forKey:(id)kSecAttrGeneric];
    [dictForQuery setValue:(id)kCFBooleanTrue forKey:(id)kSecMatchCaseInsensitive];
    [dictForQuery setValue:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];
    [dictForQuery setValue:(id)kCFBooleanTrue forKey:(id)kSecReturnAttributes];

    NSDictionary *queryResult = nil;
    CFTypeRef typeQuery = (__bridge CFTypeRef)queryResult;
    SecItemCopyMatching((CFDictionaryRef)dictForQuery, &typeQuery);
    if (queryResult) {

        NSMutableDictionary *dictForUpdate = [[NSMutableDictionary alloc] init];
        [dictForUpdate setValue:[NSString stringWithUTF8String:kKeychainUDIDItemIdentifier] forKey:(NSString *)kSecAttrDescription];
        [dictForUpdate setValue:keychainItemID forKey:(id)kSecAttrGeneric];

        const char *udidStr = [newUDID UTF8String];
        NSData *keyChainItemValue = [NSData dataWithBytes:udidStr length:strlen(udidStr)];
        [dictForUpdate setValue:keyChainItemValue forKey:(id)kSecValueData];

        OSStatus updateErr = noErr;

        // First we need the attributes from the Keychain.
        NSMutableDictionary *updateItem = [NSMutableDictionary dictionaryWithDictionary:queryResult];

        // Second we need to add the appropriate search key/values.
        // set kSecClass is Very important
        [updateItem setObject:(id)kSecClassGenericPassword forKey:(id)kSecClass];

        updateErr = SecItemUpdate((CFDictionaryRef)updateItem, (CFDictionaryRef)dictForUpdate);
        if (updateErr != errSecSuccess) {
            NSLog(@"Update KeyChain Item Error!!! Error Code:%d", updateErr);

            return NO;
        }
        else {
            NSLog(@"Update KeyChain Item Success!!!");
            return YES;
        }
    }
    return NO;
}