iOS获取手机的Mac地址

首先说明下，下面两种方法均可以获得手机的mac地址，但是有个限制，是在iOS7以下才可以获得。iOS7以后苹果对于sysctl和ioctl进行了技术处理，MAC地址返回的都是02:00:00:00:00:00。官方文档上这样写的“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以后想要获取设备的唯一标示Mac地址已经不行了，只能用其他的代替。

下面说下两种方式：

都需要导入几个头文件

#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>

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 subsystemmgmtInfoBase[1] = AF_ROUTE;       // Routing table infomgmtInfoBase[2] = 0;mgmtInfoBase[3] = AF_LINK;        // Request link layer informationmgmtInfoBase[4] = NET_RT_IFLIST;  // Request all configured interfaces// With all configured interfaces requested, get handle indexif ((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 callif ((msgBuffer = malloc(length)) == NULL)errorFlag = @"buffer allocation failure";else{// Get system information, store in bufferif (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 structureinterfaceMsgStruct = (struct if_msghdr *) msgBuffer;// Map to link-level socket structuresocketStruct = (struct sockaddr_dl *) (interfaceMsgStruct + 1);// Copy link layer address data in socket structure to an arraymemcpy(&macAddress, socketStruct->sdl_data + socketStruct->sdl_nlen, 6);// Read from char array into a string object, into traditional Mac address formatNSString *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 memoryfree(msgBuffer);return macAddressString;
}

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