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Receiving NSData as _data, containing an encoded UTF-8 string as bytes, I ended up doing this to get back the original string:

decoded_data = bytearray(base64.b16decode(str(ObjCInstance(_data).CKUppercaseHexStringWithoutSpaces()))).decode()

I.e.:

• Convert to hex string (uppercase for b16decode)
• Convert to Python string
• Decode back to bytes
• Create a bytearray object
• Finally decode as UTF-8 string

There must be a simpler way?

How about something like this:

decoded_data = str(NSString.alloc().init(data=_data, encoding=NSUTF8StringEncoding))

@omz, thanks.

For completeness sake, I’ll include the option I found reading the manual, of all things:

decoded_data = objc_util.nsdata_to_bytes(ObjCInstance(_data)).decode()

Maybe more readable but less efficient than the direct ObjC UTF-decoding.

@mikael Ah, that's much better actually. Forget my solution, I somehow forgot that function existed.