Alternative iOS device unique identifier

UIDevice+HostUUID.h

#import <UIKit/UIKit.h>

@interface UIDevice (HostUUID)

- (NSString *) xcd_uniqueIdentifier;

@end

UIDevice+HostUUID.m

#import "UIDevice+HostUUID.h"

@implementation UIDevice (HostUUID)

- (NSString *) xcd_uniqueIdentifier
{
	CFUUIDBytes uuidBytes;
	gethostuuid((unsigned char *)&uuidBytes, &(const struct timespec){0, 0});
	CFUUIDRef uuid = CFUUIDCreateFromUUIDBytes(kCFAllocatorDefault, uuidBytes);
	CFStringRef uuidString = CFUUIDCreateString(kCFAllocatorDefault, uuid);
	CFRelease(uuid);
	return [CFBridgingRelease(uuidString) lowercaseString];
}

@end