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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：
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// 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];
}
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;
}
以上就是ios获取手机的mac地址的两种方法，希望对大家的学习有所帮助。
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