iOS擷取手機的Mac地址

首先說明下，下面兩種方法均可以獲得手機的mac地址，但是有個限制，是在iOS一下才可以獲得。iOS7以後蘋果對於sysctl和ioctl進行了技術處理，MAC地址返回的都是02:00:00:00:00:00。官方文檔上這樣寫的“Twolow-level networking APIs that used to return a MAC address now return thefixed value 02:00:00:00:00:00. The APIs in question are sysctl(NET_RT_IFLIST) and ioctl(SIOCGIFCONF). Developers using the value of the MAC address should migrate toidentifiers such as -[UIDevice identifierForVendor].This change affects all apps running on iOS 7”。

所以在iOS7以後想要擷取裝置的唯一標示Mac地址已經不行了，只能用其他的代替。

下面說下兩種方式：

都需要匯入幾個標頭檔

#include #include #include 

方法1：

// Return the local MAC addy// Courtesy of FreeBSD hackers email list// Accidentally munged during previous update. Fixed thanks to 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");        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)];    //    NSString *outstring = [NSString stringWithFormat:@"%02x%02x%02x%02x%02x%02x", *ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];        NSLog(@"outString:%@", outstring);        free(buf);        return [outstring uppercaseString];}

源自http://blog.csdn.net/showhilllee

方法2：

- (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 = NULL;        // 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);        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;}