【IOS工具类】获得设备唯一标识（兼容IOS5，6，7）

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UIDevice+IdentifierAddition.h：

#import <Foundation/Foundation.h>@interface UIDevice (IdentifierAddition)- (NSString *) uniqueDeviceIdentifier;@end

UIDevice+IdentifierAddition.m

#import "UIDevice+IdentifierAddition.h"#import "NSString+MD5.h"#import "EnvConstant.h"#include <sys/socket.h>#include <sys/sysctl.h>#include <net/if.h>#include <net/if_dl.h>#define IS_IOS_7 ([[[UIDevice currentDevice] systemVersion] floatValue] >=7.0 ? YES : NO)@interface UIDevice(Private)- (NSString *) macaddress;@end@implementation UIDevice (IdentifierAddition)#pragma mark - Private Methods// Return the local MAC addy// Courtesy of FreeBSD hackers email list// Accidentally munged during previous update. Fixed thanks to erica sadun & mlamb.- (NSString *) macaddress{        int                 mib[6];    size_t              len;    char                *buf;    unsigned char       *ptr;    struct if_msghdr    *ifm;    struct sockaddr_dl  *sdl;        mib[0] = CTL_NET;    mib[1] = AF_ROUTE;    mib[2] = 0;    mib[3] = AF_LINK;    mib[4] = NET_RT_IFLIST;        if ((mib[5] = if_nametoindex("en0")) == 0) {        printf("Error: if_nametoindex error\n");        return NULL;    }        if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {        printf("Error: sysctl, take 1\n");        return NULL;    }        if ((buf = malloc(len)) == NULL) {        printf("Could not allocate memory. error!\n");        return NULL;    }        if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {        printf("Error: sysctl, take 2");        free(buf);        return NULL;    }        ifm = (struct if_msghdr *)buf;    sdl = (struct sockaddr_dl *)(ifm + 1);    ptr = (unsigned char *)LLADDR(sdl);    NSString *outstring = [NSString stringWithFormat:@"%02X:%02X:%02X:%02X:%02X:%02X",                            *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];    free(buf);        return outstring;}#pragma mark - uniqueDeviceIdentifier- (NSString *) uniqueDeviceIdentifier{    if(IS_IOS_7){        NSString *identifierForVendor = [NSString stringWithFormat:@"%@",[[[UIDevice currentDevice]identifierForVendor]UUIDString]];        NSLog(@"identifierForVendor=%@",identifierForVendor);        NSString *stringToHash = [NSString stringWithFormat:@"%@%@",identifierForVendor,DEVICE_TOKEN_PASS];        NSLog(@"stringToHash = %@",stringToHash);        NSString *result = [NSString md5:stringToHash];        NSLog(@"result = %@",result);        return result;    }else{        NSString *macaddress = [[UIDevice currentDevice] macaddress];        NSLog(@"macaddress = %@",macaddress);        NSString *stringToHash = [NSString stringWithFormat:@"%@%@",macaddress,DEVICE_TOKEN_PASS];        NSLog(@"stringToHash = %@",stringToHash);        NSString *result = [NSString md5:stringToHash];        NSLog(@"result = %@",result);        return result;    }}@end

NSString+MD5.h：

#import <Foundation/Foundation.h>@interface NSString (MD5)+(NSString *)md5:(NSString *)str;@end

NSString+MD5.m：

#import "NSString+MD5.h"#import <CommonCrypto/CommonDigest.h> // Need to import for CC_MD5 access@implementation NSString (MD5)+(NSString *)md5:(NSString *)str{    const char *cStr = [str UTF8String];    unsigned char result[16];    CC_MD5(cStr, strlen(cStr), result); // This is the md5 call    return [NSString stringWithFormat:            @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",            result[0], result[1], result[2], result[3],            result[4], result[5], result[6], result[7],            result[8], result[9], result[10], result[11],            result[12], result[13], result[14], result[15]            ]; }@end

使用方法：

[[UIDevice currentDevice]uniqueDeviceIdentifier];

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