如何在 MacOS Objective C / C++ 中将 UUID 转换为 16 字节的 UInt8 数组

Question

I can get UUID string using below code ..

CFUUIDRef theUUID = CFUUIDCreate(NULL);
CFStringRef string = CFUUIDCreateString(NULL, theUUID);

Or I can get bytes using below code

CFUUIDRef theUUID = CFUUIDCreate(NULL);
CFUUIDBytes bytes = CFUUIDGetUUIDBytes(theUUID);

But I would like to make an array of UInt8 and as the UUID is 16 bytes, so the output array should be in 16 bytes.

Answer 1

By examining the CFUUIDBytes typedef you can see how to access each byte:

CFUUIDRef theUUID = CFUUIDCreate(NULL);
CFUUIDBytes bytes = CFUUIDGetUUIDBytes(theUUID);

UInt8 rawData[16];
rawData[0] = bytes.byte0;
rawData[1] = bytes.byte1;
...
rawData[15] = bytes.byte15;