问题
Swift offers both Data and [UInt8] types, which do a very similar thing.
- What are the differences between the two?
- When designing new API's, what's the preferred type?
回答1:
[UInt8] is essentially a byte array, a byte (as I'm sure you know), is comprised of 8 bits. Whilst NSData isn't simply a byte array, deep down it's underlying structure is based off one. You can easily convert between them using methods such as data.bytes, for example.
In terms of designing APIs, I would personally recommend you design them with NSData simply because of all the extra functionality it offers over a simple byte array. Apple has already done a lot of the legwork for you, so why do it again yourself?
来源：https://stackoverflow.com/questions/39873282/data-vs-uint8