[封装]iOS获取设备唯一标识

一个用于iOS6, 另一个用于iOS7以上

iOS6: from http://stackoverflow.com/questions/677530/how-can-i-programmatically-get-the-mac-address-of-an-iphone

#import <Security/Security.h>

#include <sys/socket.h>

#include <sys/sysctl.h>

#include <net/if.h>

#include <net/if_dl.h>

+ (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;

    mgmtInfoBase[0] = CTL_NET;        
    mgmtInfoBase[1] = AF_ROUTE;       
    mgmtInfoBase[2] = 0;
    mgmtInfoBase[3] = AF_LINK;        
    mgmtInfoBase[4] = NET_RT_IFLIST;  
    
    if ((mgmtInfoBase[5] = if_nametoindex("en0")) == 0)
        errorFlag = @"if_nametoindex failure";
    else
    {
        if (sysctl(mgmtInfoBase, 6, NULL, &length, NULL, 0) < 0)
            errorFlag = @"sysctl mgmtInfoBase failure";
        else
        {
            if ((msgBuffer = malloc(length)) == NULL)
                errorFlag = @"buffer allocation failure";
            else
            {
                if (sysctl(mgmtInfoBase, 6, msgBuffer, &length, NULL, 0) < 0)
                    errorFlag = @"sysctl msgBuffer failure";
            }
        }
    }
    
    if (errorFlag != NULL)
    {
        NSLog(@"Error: %@", errorFlag);
        if (msgBuffer) {
            free(msgBuffer);
        }
        
        return errorFlag;
    }
    
    interfaceMsgStruct = (struct if_msghdr *) msgBuffer;
    
    socketStruct = (struct sockaddr_dl *) (interfaceMsgStruct + 1);
    
    memcpy(&macAddress, socketStruct->sdl_data + socketStruct->sdl_nlen, 6);
    
    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);
    
    free(msgBuffer);
    
    return macAddressString;
}

iOS7: 从keychain中获取

http://blog.csdn.net/wonengxing/article/details/42142595