iOS5中加类UUID
在ios5中，UUID已不再被推荐使用，在将来的版本中，这个功能可能会消失。所以我们得探寻它的取代方法，能唯一标识设备的东西。往往硬件上有唯一标识，所以我们可以用硬件上的信息来取代UUID, 硬件上的MAC地址就能达到这样的目的。
下面的函数就可以返回XX:XX:XX:XX:XX:XX类型的字符串(12个16进制数)
#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 *inte易做图ceMsgStruct;
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 inte易做图ces
// With all configured inte易做图ces 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 inte易做图ce message structure
inte易做图ceMsgStruct = (struct if_msghdr *) msgBuffer;
// Map to link-level socket structure
socketStruct = (struct sockaddr_dl *) (inte易做图ceMsgStruct + 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;
}
源码来自：http://iphonedevelopertips.com/device/determine-mac-address.html
系统SKD也提供了一种方法得到标识字符串，如下：
[[UIDevice currentDevice] uniqueIdentifier]
UUID在iOS5中也可以用，但不能保证在以后的系统升级后（iOS6 , 7）还能用。
在此也随便把得到UUID的方法以写出来：
-(NSString*) uuid
{
CFUUIDRef puuid = CFUUIDCreate( nil );
CFStringRef uuidString = CFUUIDCreateString( nil, puuid );
NSString * result = (NSString *)CFStringCreateCopy( NULL, uuidString);
CFRelease(puuid);
CFRelease(uuidString);
return [result autorelease];
}
目前我知道的就是用这些方法来唯一标识设备，如果你有更好的方法，也希望你能与大家分享。
摘自 开心程序
补充：综合编程 , 其他综合 ,
