- (NSString *)createUUID

{

  // Create universally unique identifier (object)

  CFUUIDRef uuidObject = CFUUIDCreate(kCFAllocatorDefault);

 

  // Get the string representation of CFUUID object.

  NSString *uuidStr = [(NSString *)CFUUIDCreateString(kCFAllocatorDefault, uuidObject) autorelease];

 

  // If needed, here is how to get a representation in bytes, returned as a structure

  // typedef struct {

  //   UInt8 byte0;

  //   UInt8 byte1;

  //   ...

  //   UInt8 byte15;

  // } CFUUIDBytes;

  CFUUIDBytes bytes = CFUUIDGetUUIDBytes(uuidObject);

 

  CFRelease(uuidObject);

 

  return uuidStr;

}